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WO2016157388A1 - Mobile terminal, server, method for providing sound field data, and program - Google Patents

Mobile terminal, server, method for providing sound field data, and program Download PDF

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Publication number
WO2016157388A1
WO2016157388A1 PCT/JP2015/060008 JP2015060008W WO2016157388A1 WO 2016157388 A1 WO2016157388 A1 WO 2016157388A1 JP 2015060008 W JP2015060008 W JP 2015060008W WO 2016157388 A1 WO2016157388 A1 WO 2016157388A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
sound field
measurement data
vehicle type
server
Prior art date
Application number
PCT/JP2015/060008
Other languages
French (fr)
Japanese (ja)
Inventor
克仁 石岡
啓太郎 菅原
Original Assignee
パイオニア株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by パイオニア株式会社 filed Critical パイオニア株式会社
Priority to PCT/JP2015/060008 priority Critical patent/WO2016157388A1/en
Publication of WO2016157388A1 publication Critical patent/WO2016157388A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K15/00—Acoustics not otherwise provided for
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response

Definitions

  • the present invention relates to a method for correcting a sound field characteristic in a vehicle.
  • Patent Document 1 describes a technique of using a built-in microphone of a mobile phone as a microphone for measuring a sound field in an audio system having a sound field correction function.
  • correction data is generated by synchronously adding a large number of measurement data obtained indoors, so that it takes a long time, for example, 7 to 8 minutes to measure the sound field.
  • the user since a relatively high level of test sound is output in the room during that time, the user generally needs to leave the room during sound field measurement.
  • An object of this invention is to provide the terminal device which can measure a sound field easily and can correct the sound field characteristic of a compartment.
  • the invention according to claim 1 is a portable terminal capable of communicating with a server that generates vehicle-specific sound field correction data using a plurality of uploaded vehicle-specific sound field measurement data, and the sound of the first vehicle Measuring means for measuring a field to generate first sound field measurement data; acquisition means for acquiring vehicle type information of the vehicle that is the object of measurement; the first sound field measurement data and the vehicle type information; Is generated by measuring the sound field of the second vehicle which is a vehicle different from the first vehicle and is the vehicle type.
  • Receiving means for receiving, from the server, vehicle type sound field correction data corresponding to the vehicle type information generated based on the second sound field measurement data.
  • a sound field measurement data providing method executed by a portable terminal capable of communicating with a server that generates vehicle-specific sound field correction data using a plurality of uploaded vehicle-specific sound field measurement data.
  • a measurement step of measuring a sound field of a first vehicle to generate first sound field measurement data, an acquisition step of acquiring vehicle type information of the vehicle subjected to the measurement, and the first A transmission step of transmitting the sound field measurement data and the vehicle type information to the server, the first sound field measurement data, and the first vehicle being a vehicle different from the first vehicle.
  • the invention according to claim 5 is a program executed by a portable terminal having a computer and capable of communicating with a server that generates a vehicle-specific sound field correction data using a plurality of uploaded vehicle-specific sound field measurement data.
  • the measuring means for measuring the sound field of the first vehicle to generate the first sound field measurement data
  • the acquiring means for acquiring the vehicle type information of the vehicle to be measured
  • the first sound Transmitting means for transmitting the field measurement data and the vehicle type information to the server; the first sound field measurement data; and the sound of the second vehicle which is a vehicle different from the first vehicle and which is the vehicle type.
  • the second sound field measurement data generated by measuring the field, and the vehicle type sound field correction data corresponding to the vehicle type information generated on the basis of the second sound field measurement data from the server.
  • the invention according to claim 7 is a server communicable with a portable terminal, and sound field measurement data which is data obtained by measuring vehicle type information and a sound field of the vehicle from a plurality of portable terminals.
  • 1 shows a configuration of a sound field correction system according to an embodiment. It is a block diagram which shows the structure of a server. An example of correction data is shown. It is a block diagram which shows the structure of the portable terminal and vehicle equipment in a vehicle interior. It is a flowchart of the correction data provision process by 1st Example. The example of the sample number according to the measurement item in 2nd Example is shown. It is a flowchart of the correction data provision process by 2nd Example. The example of the model evaluation of the portable terminal in 3rd Example is shown. It is a flowchart of the correction data provision process by 3rd Example. The example of the correction data in 4th Example is shown. It is a flowchart of the correction data provision process by 4th Example. The example of the correction data provision process by 4th Example. The example of the correction data in 5th Example is shown. It is a flowchart of the correction data provision process by 5th Example.
  • a portable terminal capable of communicating with a server that generates vehicle-specific sound field correction data using a plurality of uploaded vehicle-specific sound field measurement data uses the sound field of the first vehicle.
  • Measuring means for measuring and generating first sound field measurement data acquisition means for acquiring vehicle type information of the vehicle subjected to the measurement, the first sound field measurement data and the vehicle type information
  • the transmission means for transmitting to the server, the first sound field measurement data, and the first vehicle generated by measuring the sound field of the second vehicle which is a vehicle different from the first vehicle and which is the vehicle type.
  • Receiving means for receiving, from the server, vehicle type sound field correction data corresponding to the vehicle type information generated based on the sound field measurement data.
  • the above mobile terminal is used in the vehicle cabin.
  • the portable terminal measures the sound field characteristics of the first vehicle to generate first sound field measurement data, and acquires the vehicle type information of the vehicle to be measured based on user input and the like.
  • a portable terminal transmits 1st sound field measurement data and vehicle type information to a server.
  • the server receives the first sound field measurement data from the first vehicle, is a vehicle different from the first vehicle, and is a second vehicle from the second vehicle that is the same vehicle type as the first vehicle. Receive sound field measurement data.
  • a server produces
  • the server can collect sound field measurement data from a plurality of portable terminals and generate and provide sound field correction data for each vehicle type.
  • the measurement unit includes an output unit that outputs a test signal to the vehicle-mounted device attached to the vehicle, and the vehicle-mounted device reproduces the test signal in the vehicle compartment of the vehicle.
  • Sound collecting means for collecting the output test sound and generating the sound field measurement data.
  • sound field correction data can be generated by outputting a test signal to the vehicle-mounted device and collecting the test sound reproduced by the vehicle-mounted device in the vehicle interior by the sound collecting means of the mobile terminal.
  • the portable terminal includes transmission means for transmitting the vehicle-specific sound field correction data to a playback device mounted on the first vehicle.
  • the sound field in the vehicle of a 1st vehicle can be correct
  • sound field measurement data executed by a portable terminal capable of communicating with a server that generates vehicle type sound field correction data using a plurality of uploaded vehicle type sound field measurement data.
  • the providing method includes a measurement step of measuring a sound field of the first vehicle to generate first sound field measurement data, an acquisition step of acquiring vehicle type information of the vehicle that is the measurement target, and the first A transmission step of transmitting the sound field measurement data and the vehicle type information to the server, the first sound field measurement data, and the first vehicle being a vehicle different from the first vehicle.
  • the server can collect sound field measurement data from a plurality of portable terminals, and generate and provide sound field correction data for each vehicle type.
  • a portable terminal having a computer and capable of communicating with a server that generates vehicle type sound field correction data using a plurality of uploaded vehicle type sound field measurement data.
  • the program for measuring the sound field of the first vehicle and generating first sound field measurement data the acquisition means for acquiring the vehicle type information of the vehicle that is the object of measurement, the first sound Transmitting means for transmitting the field measurement data and the vehicle type information to the server; the first sound field measurement data; and the sound of the second vehicle which is a vehicle different from the first vehicle and which is the vehicle type.
  • the server can collect sound field measurement data from a plurality of portable terminals and generate and provide sound field correction data for each vehicle type.
  • This program can be stored and handled in a storage medium.
  • the server capable of communicating with the mobile terminal is a sound field measurement data which is data obtained by measuring the vehicle type information of the vehicle and the sound field of the vehicle from a plurality of mobile terminals.
  • a generation unit configured to generate type correction data; and a transmission unit configured to transmit the vehicle type correction data to the portable terminal that transmitted the vehicle type information.
  • the server can collect sound field measurement data from a plurality of portable terminals, and generate and provide sound field correction data for each vehicle type.
  • FIG. 1 shows the overall configuration of the sound field correction system according to the first embodiment.
  • the server 10 and the mobile terminal 20 used in the vehicle 7 can communicate with each other through the network 5.
  • a typical example of the network 5 is the Internet.
  • the server 10 receives in-vehicle sound field measurement data for each vehicle type from a plurality of portable terminals 20. And the server 10 produces
  • FIG. 1 A block diagram illustrating an exemplary computing environment in accordance with the present disclosure.
  • the portable terminal 20 is connected to the vehicle-mounted device 30 that is an acoustic device.
  • the portable terminal 20 transmits the measurement data of the sound field characteristics of the passenger compartment to the server 10.
  • the mobile terminal 20 receives the sound field correction data from the server 10 and transfers it to the vehicle-mounted device 30.
  • the transferred sound field correction data is set in the vehicle-mounted device 30.
  • FIG. 2 shows the internal configuration of the server 10.
  • the server 10 includes a communication unit 11, a control unit 12, a storage unit 13, and a correction data DB (database) 14.
  • the communication unit 11 is a unit for communicating with the mobile terminal 20 via the network 5.
  • the control unit 12 controls the entire server 10.
  • the control unit 12 includes a computer such as a CPU, and performs various controls by executing a program prepared in advance.
  • the storage unit 13 includes a ROM, a RAM, a hard disk, and the like, and stores various programs executed by the control unit 12.
  • the storage unit 13 also functions as a work memory when the control unit 12 performs various processes.
  • the correction data DB 14 stores sound field correction data (hereinafter simply referred to as “correction data”) for each vehicle type.
  • the correction data is data for correcting the sound field characteristics in the vehicle when the audio device reproduces music in the vehicle, which is set in the audio device mounted on the vehicle 7.
  • FIG. 3 shows an example of the contents stored in the correction data DB 14.
  • the correction data DB 14 stores correction data for performing appropriate sound field correction in the vehicle compartment of each vehicle type.
  • the “vehicle type” information includes “year” in addition to “vehicle type name”.
  • FIG. 4 shows the configuration of the mobile terminal 20 and the vehicle-mounted device 30 in the vehicle 7.
  • the portable terminal 20 is connected to the vehicle-mounted device 30, and the vehicle-mounted device 30 is connected to a speaker 35 mounted on the vehicle.
  • the mobile terminal 20 and the vehicle-mounted device 30 may be wired by a cable or the like, or may be wirelessly connected by Bluetooth (registered trademark) or the like.
  • the mobile terminal 20 includes a communication unit 21, a control unit 22, a storage unit 23, a touch panel 24, a microphone 25, and an output unit 26.
  • the communication unit 21 is a unit for communicating with the server 10 via the network 5.
  • the control unit 22 controls the entire mobile terminal 20.
  • the control unit 22 is configured by a computer such as a CPU, and performs various types of control, particularly correction data provision processing described later, by executing a program prepared in advance.
  • the storage unit 23 includes a ROM, a RAM, a hard disk, and the like, and stores various programs executed by the control unit 22.
  • the control unit 22 also functions as a work memory when performing various processes.
  • storage part 23 has memorize
  • the test signal St is downloaded from the server 10 and stored in the storage unit 23 before the sound field is measured in the vehicle.
  • the touch panel 24 has both a display function and an input function. Information / images displayed to the user are displayed on the touch panel 24, and input performed when the user touches the touch panel with a finger or the like is acquired by the touch panel 24.
  • the microphone 25 is a microphone built in the mobile terminal 20.
  • the output unit 26 outputs a test signal St to the vehicle-mounted device 30 when the sound field measurement is performed in the vehicle 7.
  • the communication unit 21 functions as the transmission unit, reception unit, and transfer unit of the present invention
  • the control unit 22, the microphone 25, and the output unit 26 function as the measurement unit of the present invention
  • the touch panel 24 of the present invention It functions as an acquisition means.
  • the output unit 26 functions as output means of the present invention
  • the microphone 25 functions as sound collection means of the present invention.
  • the mobile terminal 20 outputs a test signal St prepared in advance to the vehicle-mounted device 30, and the vehicle-mounted device 30 reproduces the test signal St through the speaker 35 and outputs the test sound S to the vehicle interior.
  • the test signal St is a signal prepared for measuring an impulse response, a frequency characteristic, a reverberation characteristic, and the like as the sound field characteristic.
  • the test sound S output into the passenger compartment is picked up by the microphone 25 and temporarily stored in the storage unit 23.
  • the control unit 22 transmits the collected data as measurement data to the server 10 via the communication unit 21.
  • the portable terminal 20 adds the vehicle type information of the vehicle 7 when transmitting the measurement data to the server 10. That is, the measurement data is uploaded to the server 10 together with the vehicle type information of the vehicle that has performed the measurement.
  • the server 10 classifies the measurement data uploaded from the mobile terminals 20 of a plurality of vehicles for each vehicle type, and generates correction data. Specifically, the server 10 generates correction data by synchronously adding a plurality of measurement data uploaded from a plurality of portable terminals 20 for the same vehicle type. Synchronous addition emphasizes the sound field characteristics unique to the vehicle model, and smoothes the characteristics and characteristic variations of individual vehicles, and correct data that accurately represents the sound field characteristics of the vehicle cabin of the vehicle model. Is obtained.
  • the portable terminal 20 acquires one measurement data by one measurement and uploads it to the server 10, and the server 10 acquires a large number of measurement data from the plurality of portable terminals 20, Increase the number of samples for synchronous addition. This makes it possible to collect a large number of samples and generate accurate correction data for each vehicle type while preventing an excessive measurement load on each vehicle 7.
  • Examples of actual sound field correction include time alignment correction, frequency characteristic correction, reverberation characteristic correction, and the like.
  • the time alignment correction is a correction that corrects a difference in distance between a plurality of speakers mounted on the vehicle and a listening position in the passenger compartment so that sounds output from the plurality of speakers simultaneously reach the listening position.
  • the correction of the frequency characteristic is correction for adjusting the gain for each band so that the frequency characteristic in the passenger compartment is basically flat.
  • the reverberation characteristic correction is correction for adjusting the reverberation time in the passenger compartment to an appropriate time.
  • FIG. 5 is a flowchart of the correction data providing process according to the first embodiment. This process is performed mainly by the control unit 12 of the server 10 and the control unit 22 of the mobile terminal 20 executing a prepared program.
  • the user operates the touch panel 24 to input the vehicle type information of the vehicle 7, and the mobile terminal 20 acquires this (step S11).
  • the portable terminal 20 performs the sound field measurement in the vehicle interior as described above, and generates measurement data (step S12). And the portable terminal 20 transmits vehicle type information and measurement data to the server 10 (step S13).
  • the server 10 extracts the measurement data of the same vehicle type already stored in the correction data DB 14 based on the vehicle type information, that is, the measurement data transmitted from the mobile terminal 20 of the other vehicle 7 until then. Then, using the measurement data received in step S13 and the measurement data extracted from the correction data DB 14, synchronous addition is performed as described above to generate correction data (step S14), and the correction data is transmitted to the portable terminal 20. (Step S15).
  • the mobile terminal 20 When the mobile terminal 20 receives the correction data, the mobile terminal 20 transfers the correction data to the vehicle-mounted device 30 in the vehicle 7 (step S16). Thereby, the correction data transmitted from the server 10 is set in the vehicle-mounted device 30. Therefore, the music reproduced by the vehicle-mounted device 30 is subjected to sound field correction suitable for the vehicle type based on the correction data.
  • the server 10 collects measurement data measured in the plurality of vehicles 7 from each portable terminal 20 and performs synchronous addition using measurement data of a large number of samples. To generate correction data. Therefore, the measurement time in each vehicle can be shortened, so that the user can be in the vehicle during the sound field measurement. Thus, sound field correction data suitable for the type of vehicle can be generated while reducing the measurement burden on each vehicle.
  • the vehicle type information is transmitted from the mobile terminal 20 to the server 10, and the server 10 generates correction data for each vehicle type and provides it to the mobile terminal 20.
  • information on the vehicle-mounted device used in the vehicle is also transmitted from the portable terminal 20 to the server 10, and the server 10 generates correction data for each vehicle type and each type of the vehicle-mounted device 30 to generate the portable terminal 20. May be provided.
  • the second embodiment relates to processing when there are a plurality of measurement items for sound field correction.
  • the measurement item A may be an impulse response
  • the measurement item B may be a frequency characteristic
  • the measurement item C may be a reverberation characteristic.
  • the server 10 receives measurement data from a plurality of portable terminals 20 for each vehicle type and generates correction data by synchronous addition, but the number of measurement data samples is insufficient as described above. If so, it is difficult to ensure the accuracy of the generated correction data.
  • the server 10 stores the number of measurement data samples collected for each measurement item in the storage unit 13, and the measurement item for which the number of samples is insufficient (hereinafter referred to as "sample shortage item"). To the portable terminal 20 to request measurement data for the measurement item.
  • FIG. 6 is an example of the number of samples for each measurement item stored in the storage unit 13 of the server 10.
  • the server 10 For each vehicle type, the number of measurement data samples already obtained for the measurement items A to C is stored. Assuming that the number of samples of 50 or more is necessary in order to ensure the accuracy of the correction data to be created, the measurement item having the number of samples in FIG. This is a sample shortage item. Therefore, the server 10 notifies the sample shortage item and requests transmission of measurement data for the vehicle of the vehicle type having the sample shortage item. As a result, the server 10 can facilitate the collection of measurement data for the sample shortage items and ensure the accuracy of the correction data provided to the mobile terminal 20.
  • FIG. 7 is a flowchart of the correction data providing process in the second embodiment.
  • the portable terminal 20 when a user operates the touch panel 24 and inputs the vehicle type information of the vehicle 7, the portable terminal 20 acquires this (step S21) and transmits it to the server 10 (step S22).
  • the server 10 When the server 10 receives the vehicle type information, the server 10 refers to the number of samples for each measurement item as illustrated in FIG. 6 and identifies a sample shortage item for the vehicle type (step S23). Then, the server 10 notifies the portable terminal 20 of the specified sample shortage item (step S24).
  • the mobile terminal 20 receives the notification of the sample shortage item, performs measurement on the measurement item, generates measurement data (step S25), and transmits the measurement data to the server 10 (step S26).
  • the server 10 generates correction data for the sample shortage item using the transmitted measurement data and stores it in the correction data DB 14 (step S27). Then, the server 10 acquires correction data relating to the vehicle type (in this example, correction data for the measurement items A to C) from the correction data DB 14 and transmits the correction data to the portable terminal 20 (step S28). As a result, for the sample shortage item, correction data newly created using the measurement data transmitted from the mobile terminal 20 in step S26 is transmitted to the mobile terminal 20.
  • the vehicle type in this example, correction data for the measurement items A to C
  • step S29 the portable terminal 20 will transfer to the onboard equipment 30 in the vehicle 7, if correction data are received (step S29).
  • the correction data transmitted from the server 10 is set in the vehicle-mounted device 30. Therefore, the music reproduced by the vehicle-mounted device 30 is subjected to sound field correction suitable for the vehicle type based on the correction data.
  • the server 10 not only notifies the portable terminal 20 of the sample shortage item for which the measurement data is lacking as described above, but also transmits a test sound for measuring the sample shortage item to the portable terminal 20.
  • the test sound is a signal prepared for measuring an impulse response, a frequency characteristic, a reverberation characteristic, etc. according to a sample shortage item.
  • the server 10 transmits a signal for measuring the impulse response as the test sound.
  • the sample shortage item is the measurement item B
  • the server 10 transmits a signal for measuring frequency characteristics as a test sound.
  • the server 10 notifies the portable terminal 20 of the measurement item for which the number of samples is insufficient, and promotes the collection of measurement data for the measurement item. For this reason, the server 10 can quickly collect measurement data of the number of samples necessary to ensure the accuracy of the correction data, and can quickly ensure the accuracy of the correction data provided to the mobile terminal 20. It becomes.
  • correction data is generated in consideration of the appropriateness in the measurement of the mobile terminal 20 used for the sound field measurement in the vehicle 7.
  • various portable terminals 20 are used, and the performance of the built-in microphone 25 is also different. Therefore, the measurement data measured by the portable terminal 20 including the low-performance microphone 25 may be inappropriate for creating correction data on the server 10 side.
  • the model information of the mobile terminal 20 is also transmitted.
  • the server 10 creates correction data for each vehicle type and for each model of the mobile terminal 20, and evaluates the appropriateness of each mobile terminal 20 for each vehicle type.
  • FIG. 8 shows an example of the evaluation result of the mobile terminal 20.
  • the appropriateness of the vehicle type is determined for the combination of the portable terminal 20 and the vehicle type.
  • the appropriateness for each vehicle type can be considered to indicate the compatibility between the mobile terminal 20 and the vehicle type.
  • the overall suitability for the mobile terminal 20 is determined by summing up the suitability of each vehicle type.
  • these evaluations are basically performed by generating a distribution of correction data values generated using each mobile terminal 20 and calculating a deviation value. That is, it is determined that the appropriateness is high when the value of the obtained correction data is close to the standard value, and the appropriateness is low when it is far from the standard value.
  • the correction data when performing time alignment correction as sound field correction, the correction data is given as a delay amount from the farthest speaker. Therefore, the delay amount is calculated as the correction data for each combination of the mobile terminal and the vehicle type, and the appropriateness is determined based on the distribution. In the example of FIG. 8, the appropriateness is determined in three stages of ranks A to C based on whether or not the value of the correction data is close to the standard value. The appropriateness A rank is the closest to the standard value, and the appropriateness C rank is the farthest from the standard value.
  • the server 10 calculates the appropriateness of the vehicle type and the overall appropriateness, and creates correction data to be finally stored in the correction data DB 14 in consideration of this.
  • the measurement data acquired from the mobile terminal 20 whose overall suitability is C rank is not used for generation of correction data.
  • the measurement data is used by weighting according to the total suitability. For example, the weight value “2” is assigned to the measurement data acquired from the mobile terminal 20 with the overall suitability level A rank, and the weight value “1” is assigned to the measurement data acquired from the mobile terminal 20 with the overall suitability degree B rank.
  • the correction data is generated by assigning a weight value “0.5” to the measurement data acquired from the mobile terminal 20 having the overall suitability C rank.
  • the appropriateness is evaluated for each mobile terminal 20 that uploads the measurement data, and the correction data is generated in consideration of the appropriateness, so that highly accurate correction is not affected by the performance difference of the mobile terminal 20. Data can be generated.
  • the appropriateness is set in three ranks A to C, and the weight value is set for each.
  • the appropriateness may be set as a numerical value from 0 to 1 (“0” is the lowest appropriateness, “1” is the highest appropriateness), and the value may be used as the weight value.
  • FIG. 9 is a flowchart of the correction data providing process according to the third embodiment.
  • the user operates the touch panel 24 to input the vehicle type information of the vehicle 7, and the mobile terminal 20 acquires this (step S31).
  • the mobile terminal 20 acquires model information of the mobile terminal 20 (step S32). Specifically, when model information such as the model number of the mobile terminal 20 is stored in the storage unit 23 of the mobile terminal 20, the mobile terminal 20 simply reads the model information. On the other hand, when the model information is not stored in the storage unit 23 or the like, the mobile terminal 20 requests the user to input the model information, and acquires the model information input by the user operating the touch panel 24.
  • the mobile terminal 20 performs the sound field measurement in the passenger compartment as described above, and generates measurement data (step S33). And the portable terminal 20 transmits vehicle type information, model information, and measurement data to the server 10 (step S34).
  • the server 10 extracts the measurement data of the same vehicle type already stored in the correction data DB 14 based on the vehicle type information, that is, the measurement data transmitted from the mobile terminal 20 of the other vehicle 7 until then. Then, using the measurement data received in step S34 and the measurement data extracted from the correction data DB 14, synchronous addition is performed as described above to generate correction data (step S35). At this time, as described above, the server 10 refers to the appropriateness of the mobile terminal 20 based on the received model information of the mobile terminal 20, performs necessary weighting, and generates correction data. Then, the server 10 transmits the generated correction data to the mobile terminal 20 (step S36).
  • the mobile terminal 20 When the mobile terminal 20 receives the correction data, the mobile terminal 20 transfers the correction data to the vehicle-mounted device 30 in the vehicle 7 (step S37). Thereby, the correction data transmitted from the server 10 is set in the vehicle-mounted device 30. Therefore, the music reproduced by the vehicle-mounted device 30 is subjected to sound field correction suitable for the vehicle type based on the correction data.
  • the server 10 can generate highly accurate correction data by eliminating the influence of the performance difference of the mobile terminal 20 that generates and transmits measurement data.
  • the terminal 20 can also correct the sound field in the passenger compartment based on such highly accurate correction data.
  • correction data is created according to the position in the passenger compartment when the sound field is measured by the vehicle 7.
  • the measurement position that is, the listening position
  • the measurement position is the position where the mobile terminal 20 is disposed. That is, if the mobile terminal 20 is placed in the driver's seat and the sound field is measured, the obtained data becomes measurement data with the driver's seat as the listening position, and the mobile terminal 20 is installed in the passenger seat and the sound field is measured.
  • the obtained measurement data is measurement data with the passenger seat as the listening position. Therefore, in the fourth example, when the portable terminal 20 uploads the measurement data to the server 10, it transmits the position information indicating the measurement position together.
  • the server 10 classifies the measurement data collected from the plurality of mobile terminals 20 for each measurement position, and generates correction data for each measurement position.
  • FIG. 10 shows an example of correction data stored in the correction data DB 14 when correction data is generated for each measurement position in the passenger compartment.
  • three driver positions, a passenger seat, and a rear seat (rear seat) are used as measurement positions.
  • the measurement is performed with the user sitting on these seats and holding the portable terminal 20 near the head.
  • the measurement data is uploaded from the portable terminal 20 to the server 10 for each measurement position in the vehicle interior, and the server 10 generates correction data for each measurement position, thereby taking into account the actual listening position of the user in the vehicle interior.
  • the sound field can be corrected with high accuracy.
  • the measurement positions are classified into the driver seat, the passenger seat, and the rear seat, but the application of the present invention is not limited to this.
  • the rear seat may be further divided into a rear left seat and a rear right seat.
  • the driver seat, the passenger seat, the front seat, the rear seat, and all seats may be classified.
  • “rear seat” refers to the case where the measurement position is between the rear left seat and the rear right seat.
  • All seats refers to the case where the measurement position is approximately in the center of the passenger compartment (between the front and rear seats and between the left and right seats).
  • FIG. 11 is a flowchart of correction data providing processing according to the fourth embodiment.
  • the user operates the touch panel 24 to input the vehicle type information of the vehicle 7, and the mobile terminal 20 acquires this (step S41).
  • the portable terminal 20 acquires measurement position information (step S42). Specifically, the portable terminal 20 requests the user to input a measurement position, and acquires the measurement position input by the user operating the touch panel 24 as measurement position information.
  • the portable terminal 20 performs the sound field measurement in the vehicle interior as described above, and generates measurement data (step S43). And the portable terminal 20 transmits vehicle type information, measurement position information, and measurement data to the server 10 (step S44).
  • the server 10 extracts the measurement data of the same vehicle type already stored in the correction data DB 14 based on the vehicle type information, that is, the measurement data transmitted from the mobile terminal 20 of the other vehicle 7 until then. Then, using the measurement data received in step S44 and the measurement data extracted from the correction data DB 14, synchronous addition is performed as described above to generate correction data (step S45). At this time, as described above, the server 10 generates correction data for the measurement position acquired in step S44. Then, the server 10 transmits the generated correction data to the mobile terminal 20 (step S46).
  • the portable terminal 20 When receiving the correction data, the portable terminal 20 transfers the correction data to the vehicle-mounted device 30 in the vehicle 7 (step S47). Thereby, the correction data transmitted from the server 10 is set in the vehicle-mounted device 30. Therefore, the music reproduced by the vehicle-mounted device 30 is subjected to sound field correction suitable for the vehicle type based on the correction data.
  • the server 10 can generate and provide correction data for each measurement position, so that the optimum sound field correction is performed according to the listening position in the passenger compartment. Can do.
  • the server 10 when the number of measurement data samples when the correction data is created in the server 10 is insufficient, the server 10 first creates correction data with the insufficient number and provides the correction data to the portable terminal 20. Thereafter, when the necessary number of samples is obtained, correction data is generated again and transmitted to the portable terminal 20.
  • the accuracy of the correction data generated by the server 10 can be ensured.
  • the accuracy of the correction data generated is ensured. Difficult to do.
  • the server 10 does not provide the correction data until a sufficient number of samples of measurement data are obtained, the user provides the correction data even though the user has performed the sound field measurement and uploaded the measurement data to the server 10. Will not be accepted, and willingness to upload measurement data will be reduced.
  • the server 10 first generates correction data and provides it to the portable terminal 20 even when the number of samples is insufficient.
  • the correction data provided at that time is not necessarily accurate enough, so when a sufficient number of samples are obtained and high-precision correction data can be generated, the high-precision correction data is renewed.
  • the mobile terminal 20 Provides to the mobile terminal 20. In this way, collection of measurement data from the user is facilitated, and correction data with high accuracy can be provided from the server 10 at an early stage.
  • FIG. 12 is an example of data stored in the correction data DB 14 of the server 10 in the fifth embodiment.
  • the correction data generated at that time is stored in association with the vehicle type, and the number of samples of measurement data used when the correction data is generated is stored. Now, it is assumed that the number of measurement data samples necessary to generate correction data with sufficient accuracy is “50”. That is, when the number of measurement data samples is 50 or less, the number of samples is insufficient (in FIG. 12, the number of samples in the insufficient state is underlined). Therefore, correction data generated in a state where the number of samples is insufficient (hereinafter referred to as “sample shortage correction data”) is stored in association with the terminal ID of the mobile terminal 20 that provided the correction data. . In the example of FIG.
  • the number of measurement data samples is “15”, and the correction data is insufficient sample number correction data.
  • the terminal ID of the provision destination is stored. Then, when the number of measurement data samples exceeds “50” and correction data with a certain level of accuracy can be generated, the correction data is provided again to the portable terminal 20 stored as the provision destination terminal ID.
  • FIG. 13 is a flowchart of the correction data providing process according to the fifth embodiment.
  • the user operates the touch panel 24 to input the vehicle type information of the vehicle 7, and the mobile terminal 20 acquires this (step S51).
  • the portable terminal 20 performs the sound field measurement in the vehicle interior as described above, and generates measurement data (step S52). And the portable terminal 20 transmits vehicle type information and measurement data to the server 10 (step S53).
  • the server 10 extracts the measurement data of the same vehicle type already stored in the correction data DB 14 based on the vehicle type information, that is, the measurement data transmitted from the mobile terminal 20 of the other vehicle 7 until then. Then, using the measurement data received in step S53 and the measurement data extracted from the correction data DB 14, synchronous addition is performed as described above to generate correction data (step S54). At this time, the server 10 refers to the number of samples of the measurement data used to create the correction data, and determines whether the number of samples is sufficient, that is, whether the generated correction data corresponds to the insufficient sample number correction data. (Step S55).
  • step S55: Yes If the sample number deficiency correction data is satisfied (step S55: Yes), the server 10 stores the terminal ID of the portable terminal 20 at that time in the correction data DB 14 as illustrated in FIG. 12 (step S56). On the other hand, when the sample number deficiency correction data is not applicable (step S55: No), the process of step S56 is not performed. Then, the server 10 transmits the generated correction data to the mobile terminal 20 (step S57).
  • the portable terminal 20 transfers the correction data to the vehicle-mounted device 30 in the vehicle 7 (step S58).
  • the correction data transmitted from the server 10 is set in the vehicle-mounted device 30. Therefore, when the sample number shortage correction data is transmitted from the server 10, the correction data is set in the vehicle-mounted device 30, so that the accuracy of the sound field correction in the passenger compartment is not necessarily sufficient.
  • the server 10 when the number of samples of the measurement data of the same vehicle type increases in the server 10 after that and reaches a sufficient number of samples, the server 10 generates highly accurate correction data and refers to the correction data DB 14 in the past. High-precision correction data is transmitted to the portable terminal 20 that has transmitted the shortage correction data. Therefore, the portable terminal 20 receives the high-accuracy correction data, transfers it to the vehicle-mounted device 30, and sets it, thereby enabling high-accuracy sound field correction.
  • the server 10 may notify the user of the mobile terminal 20 by transmitting a message to that effect. For example, “The correction data to be sent this time was generated with an insufficient number of samples. When the number of samples becomes sufficient later, we will send more accurate correction data.” May be sent. This allows the user to wait for highly accurate correction data even if the sound field correction by the correction data transmitted first is somewhat unsatisfactory.
  • the present invention can be used in a system for playing music in a passenger compartment.

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  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
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Abstract

This mobile terminal, which is used in the interior of a vehicle, measures the sound field of the vehicle to generate sound field measurement data and, on the basis of user input etc., acquires vehicle type information for the vehicle to be measured. The mobile terminal transmits the sound field measurement data and the vehicle type information to a server. The server gathers sound field measurement data from a plurality of mobile terminals and generates sound field calibration data for each vehicle type. The generated sound field calibration data is transmitted to the mobile terminal of the user and is set in an on-board device.

Description

携帯端末、サーバ、音場測定データ提供方法、及び、プログラムMobile terminal, server, sound field measurement data providing method, and program
　本発明は、車内の音場特性を補正する手法に関する。 The present invention relates to a method for correcting a sound field characteristic in a vehicle.
　ＡＶシステムによりリスニングルームなどの音場特性を補正する方法が知られている。例えば、特許文献１は、音場補正機能を有するオーディオシステムにおいて、音場測定用のマイクロホンとして携帯電話機の内蔵マイクロホンを利用する手法を記載している。 A method of correcting the sound field characteristics such as a listening room by an AV system is known. For example, Patent Document 1 describes a technique of using a built-in microphone of a mobile phone as a microphone for measuring a sound field in an audio system having a sound field correction function.
特開２００７－２５９３９１号公報JP 2007-259391 A
　従来の音場補正手法では、室内で得られた多数の測定データを同期加算することにより補正データを生成しているため、音場測定に例えば７～８分という長い時間を要する。また、その間に室内には比較的高いレベルのテスト音が出力されるため、一般的に、ユーザは音場測定中に部屋から出る必要がある。 In the conventional sound field correction method, correction data is generated by synchronously adding a large number of measurement data obtained indoors, so that it takes a long time, for example, 7 to 8 minutes to measure the sound field. In addition, since a relatively high level of test sound is output in the room during that time, the user generally needs to leave the room during sound field measurement.
　一方、車室の音場特性を補正する機能を備える車載機器も存在するが、測定用マイクを機器に接続するのが手間である、音場測定を行う時間が長いなどの理由により、音場補正機能が有効に用いられていなかった。 On the other hand, there are in-vehicle devices that have a function to correct the sound field characteristics of the passenger compartment, but it is troublesome to connect the measurement microphone to the device, and the sound field measurement is long because of the long time for measuring the sound field. The correction function was not used effectively.
　本発明が解決しようとする課題としては、上記のものが例として挙げられる。本発明は、簡単に音場測定を行い、車室の音場特性を補正することが可能な端末装置を提供することを目的とする。 The above are examples of problems to be solved by the present invention. An object of this invention is to provide the terminal device which can measure a sound field easily and can correct the sound field characteristic of a compartment.
　請求項１に記載の発明は、アップロードされた車種別の音場測定データを複数個用いて車種別音場補正データを生成するサーバと通信可能な携帯端末であって、第１の車両の音場を測定して第１の音場測定データを生成する測定手段と、前記測定の対象となった車両の車種情報を取得する取得手段と、前記第１の音場測定データと前記車種情報とを前記サーバに送信する送信手段と、前記第１の音場測定データと、前記第１の車両とは異なる車両であり、かつ前記車種である第２の車両の音場を測定して生成された第２の音場測定データと、に基づき生成された前記車種情報に対応する車種別音場補正データを、前記サーバから受信する受信手段と、を備えることを特徴とする。 The invention according to claim 1 is a portable terminal capable of communicating with a server that generates vehicle-specific sound field correction data using a plurality of uploaded vehicle-specific sound field measurement data, and the sound of the first vehicle Measuring means for measuring a field to generate first sound field measurement data; acquisition means for acquiring vehicle type information of the vehicle that is the object of measurement; the first sound field measurement data and the vehicle type information; Is generated by measuring the sound field of the second vehicle which is a vehicle different from the first vehicle and is the vehicle type. Receiving means for receiving, from the server, vehicle type sound field correction data corresponding to the vehicle type information generated based on the second sound field measurement data.
　請求項４に記載の発明は、アップロードされた車種別の音場測定データを複数個用いて車種別音場補正データを生成するサーバと通信可能な携帯端末によって実行される音場測定データ提供方法であって、第１の車両の音場を測定して第１の音場測定データを生成する測定工程と、前記測定の対象となった車両の車種情報を取得する取得工程と、前記第１の音場測定データと前記車種情報とを前記サーバに送信する送信工程と、前記第１の音場測定データと、前記第１の車両とは異なる車両であり、かつ前記車種である第２の車両の音場を測定して生成された第２の音場測定データと、に基づき生成された前記車種情報に対応する車種別音場補正データを、前記サーバから受信する受信工程と、を備えることを特徴とする。 According to a fourth aspect of the present invention, there is provided a sound field measurement data providing method executed by a portable terminal capable of communicating with a server that generates vehicle-specific sound field correction data using a plurality of uploaded vehicle-specific sound field measurement data. A measurement step of measuring a sound field of a first vehicle to generate first sound field measurement data, an acquisition step of acquiring vehicle type information of the vehicle subjected to the measurement, and the first A transmission step of transmitting the sound field measurement data and the vehicle type information to the server, the first sound field measurement data, and the first vehicle being a vehicle different from the first vehicle. A second sound field measurement data generated by measuring the sound field of the vehicle, and a reception step of receiving vehicle type sound field correction data corresponding to the vehicle type information generated based on the vehicle type information from the server. It is characterized by that.
　請求項５に記載の発明は、コンピュータを有し、アップロードされた車種別の音場測定データを複数個用いて車種別音場補正データを生成するサーバと通信可能な携帯端末によって実行されるプログラムであって、第１の車両の音場を測定して第１の音場測定データを生成する測定手段、前記測定の対象となった車両の車種情報を取得する取得手段、前記第１の音場測定データと前記車種情報とを前記サーバに送信する送信手段、前記第１の音場測定データと、前記第１の車両とは異なる車両であり、かつ前記車種である第２の車両の音場を測定して生成された第２の音場測定データと、に基づき生成された前記車種情報に対応する車種別音場補正データを、前記サーバから受信する受信手段、として前記携帯端末を機能させることを特徴とする。 The invention according to claim 5 is a program executed by a portable terminal having a computer and capable of communicating with a server that generates a vehicle-specific sound field correction data using a plurality of uploaded vehicle-specific sound field measurement data. The measuring means for measuring the sound field of the first vehicle to generate the first sound field measurement data, the acquiring means for acquiring the vehicle type information of the vehicle to be measured, the first sound Transmitting means for transmitting the field measurement data and the vehicle type information to the server; the first sound field measurement data; and the sound of the second vehicle which is a vehicle different from the first vehicle and which is the vehicle type. And the second sound field measurement data generated by measuring the field, and the vehicle type sound field correction data corresponding to the vehicle type information generated on the basis of the second sound field measurement data from the server. Features that let you To.
　請求項７に記載の発明は、携帯端末と通信可能なサーバであって、複数の携帯端末から、車両の車種情報と当該車両の音場を測定して得られたデータである音場測定データをと受信する受信手段と、前記車種情報に基づき、前記音場測定データを車種別に分類する分類手段と、前記車種別に分類された複数の音場測定データに基づき、前記車種情報に対応する車種別補正データを生成する生成手段と、前記車種別補正データを当該車種情報を送信した携帯端末に対して送信する送信手段と、を有することを特徴とする。 The invention according to claim 7 is a server communicable with a portable terminal, and sound field measurement data which is data obtained by measuring vehicle type information and a sound field of the vehicle from a plurality of portable terminals. Receiving means, classification means for classifying the sound field measurement data into vehicle types based on the vehicle type information, and a vehicle corresponding to the vehicle type information based on a plurality of sound field measurement data classified into the vehicle types. It comprises generation means for generating type correction data, and transmission means for transmitting the vehicle type correction data to the portable terminal that has transmitted the vehicle type information.
実施例に係る音場補正システムの構成を示す。1 shows a configuration of a sound field correction system according to an embodiment. サーバの構成を示すブロック図である。It is a block diagram which shows the structure of a server. 補正データの例を示す。An example of correction data is shown. 車室内の携帯端末及び車載器の構成を示すブロック図である。It is a block diagram which shows the structure of the portable terminal and vehicle equipment in a vehicle interior. 第１実施例による補正データ提供処理のフローチャートである。It is a flowchart of the correction data provision process by 1st Example. 第２実施例における測定項目別サンプル数の例を示す。The example of the sample number according to the measurement item in 2nd Example is shown. 第２実施例による補正データ提供処理のフローチャートである。It is a flowchart of the correction data provision process by 2nd Example. 第３実施例における携帯端末の機種評価の例を示す。The example of the model evaluation of the portable terminal in 3rd Example is shown. 第３実施例による補正データ提供処理のフローチャートである。It is a flowchart of the correction data provision process by 3rd Example. 第４実施例における補正データの例を示す。The example of the correction data in 4th Example is shown. 第４実施例による補正データ提供処理のフローチャートである。It is a flowchart of the correction data provision process by 4th Example. 第５実施例における補正データの例を示す。The example of the correction data in 5th Example is shown. 第５実施例による補正データ提供処理のフローチャートである。It is a flowchart of the correction data provision process by 5th Example.
　本発明の好適な実施形態では、アップロードされた車種別の音場測定データを複数個用いて車種別音場補正データを生成するサーバと通信可能な携帯端末は、第１の車両の音場を測定して第１の音場測定データを生成する測定手段と、前記測定の対象となった車両の車種情報を取得する取得手段と、前記第１の音場測定データと前記車種情報とを前記サーバに送信する送信手段と、前記第１の音場測定データと、前記第１の車両とは異なる車両であり、かつ前記車種である第２の車両の音場を測定して生成された第２の音場測定データと、に基づき生成された前記車種情報に対応する車種別音場補正データを、前記サーバから受信する受信手段と、を備える。 In a preferred embodiment of the present invention, a portable terminal capable of communicating with a server that generates vehicle-specific sound field correction data using a plurality of uploaded vehicle-specific sound field measurement data uses the sound field of the first vehicle. Measuring means for measuring and generating first sound field measurement data, acquisition means for acquiring vehicle type information of the vehicle subjected to the measurement, the first sound field measurement data and the vehicle type information The transmission means for transmitting to the server, the first sound field measurement data, and the first vehicle generated by measuring the sound field of the second vehicle which is a vehicle different from the first vehicle and which is the vehicle type. Receiving means for receiving, from the server, vehicle type sound field correction data corresponding to the vehicle type information generated based on the sound field measurement data.
　上記の携帯端末は車両の車室内において使用される。携帯端末は、第１の車両の音場特性を測定して第１の音場測定データを生成するとともに、ユーザの入力などに基づいて、測定の対象となった車両の車種情報を取得する。そして、携帯端末は、第１の音場測定データと車種情報とをサーバに送信する。サーバは、第１の車両から第１の音場測定データと受信するとともに、第１の車両とは異なる車両であり、かつ、第１の車両と同じ車種である第２の車両から第２の音場測定データを受信する。そして、サーバは、第１の音場測定データと第２の音場測定データとに基づいて、当該車種情報に対応する車種別音場補正データを生成し、携帯端末へ送信する。こうして、サーバは、複数の携帯端末から音場測定データを収集し、車種別に音場補正データを生成して提供することができる。 The above mobile terminal is used in the vehicle cabin. The portable terminal measures the sound field characteristics of the first vehicle to generate first sound field measurement data, and acquires the vehicle type information of the vehicle to be measured based on user input and the like. And a portable terminal transmits 1st sound field measurement data and vehicle type information to a server. The server receives the first sound field measurement data from the first vehicle, is a vehicle different from the first vehicle, and is a second vehicle from the second vehicle that is the same vehicle type as the first vehicle. Receive sound field measurement data. And a server produces | generates the vehicle classification sound field correction data corresponding to the said vehicle type information based on the 1st sound field measurement data and the 2nd sound field measurement data, and transmits to a portable terminal. In this way, the server can collect sound field measurement data from a plurality of portable terminals and generate and provide sound field correction data for each vehicle type.
　上記の携帯端末の一態様では、前記測定手段は、前記車両に取り付けられた車載器にテスト信号を出力する出力手段と、前記車載器が前記テスト信号を再生することにより前記車両の車室に出力されたテスト音を収音して前記音場測定データを生成する収音手段と、を備える。この態様では、テスト信号を車載機に出力し、車載器が車室内で再生したテスト音を携帯端末の収音手段で収音することにより、音場補正データを生成することができる。 In one aspect of the portable terminal, the measurement unit includes an output unit that outputs a test signal to the vehicle-mounted device attached to the vehicle, and the vehicle-mounted device reproduces the test signal in the vehicle compartment of the vehicle. Sound collecting means for collecting the output test sound and generating the sound field measurement data. In this aspect, sound field correction data can be generated by outputting a test signal to the vehicle-mounted device and collecting the test sound reproduced by the vehicle-mounted device in the vehicle interior by the sound collecting means of the mobile terminal.
　上記の携帯端末の他の一態様では、前記車種別音場補正データを、前記第１の車両に搭載された再生装置へ送信する送信手段を有する。これにより、第１の車両の車内の音場を適切に補正することができる。 In another aspect of the portable terminal described above, the portable terminal includes transmission means for transmitting the vehicle-specific sound field correction data to a playback device mounted on the first vehicle. Thereby, the sound field in the vehicle of a 1st vehicle can be correct | amended appropriately.
　本発明の他の好適な実施形態では、アップロードされた車種別の音場測定データを複数個用いて車種別音場補正データを生成するサーバと通信可能な携帯端末によって実行される音場測定データ提供方法は、第１の車両の音場を測定して第１の音場測定データを生成する測定工程と、前記測定の対象となった車両の車種情報を取得する取得工程と、前記第１の音場測定データと前記車種情報とを前記サーバに送信する送信工程と、前記第１の音場測定データと、前記第１の車両とは異なる車両であり、かつ前記車種である第２の車両の音場を測定して生成された第２の音場測定データと、に基づき生成された前記車種情報に対応する車種別音場補正データを、前記サーバから受信する受信工程と、を備える。この方法により、サーバは複数の携帯端末から音場測定データを収集し、車種別に音場補正データを生成して提供することができる。 In another preferred embodiment of the present invention, sound field measurement data executed by a portable terminal capable of communicating with a server that generates vehicle type sound field correction data using a plurality of uploaded vehicle type sound field measurement data. The providing method includes a measurement step of measuring a sound field of the first vehicle to generate first sound field measurement data, an acquisition step of acquiring vehicle type information of the vehicle that is the measurement target, and the first A transmission step of transmitting the sound field measurement data and the vehicle type information to the server, the first sound field measurement data, and the first vehicle being a vehicle different from the first vehicle. A second sound field measurement data generated by measuring the sound field of the vehicle, and a reception step of receiving vehicle type sound field correction data corresponding to the vehicle type information generated based on the vehicle type information from the server. . With this method, the server can collect sound field measurement data from a plurality of portable terminals, and generate and provide sound field correction data for each vehicle type.
　本発明の他の好適な実施形態では、コンピュータを有し、アップロードされた車種別の音場測定データを複数個用いて車種別音場補正データを生成するサーバと通信可能な携帯端末によって実行されるプログラムは、第１の車両の音場を測定して第１の音場測定データを生成する測定手段、前記測定の対象となった車両の車種情報を取得する取得手段、前記第１の音場測定データと前記車種情報とを前記サーバに送信する送信手段、前記第１の音場測定データと、前記第１の車両とは異なる車両であり、かつ前記車種である第２の車両の音場を測定して生成された第２の音場測定データと、に基づき生成された前記車種情報に対応する車種別音場補正データを、前記サーバから受信する受信手段、として前記携帯端末を機能させる。このプログラムを実行することにより、サーバは複数の携帯端末から音場測定データを収集し、車種別に音場補正データを生成して提供することができる。このプログラムは、記憶媒体に記憶して取り扱うことができる。 In another preferred embodiment of the present invention, it is executed by a portable terminal having a computer and capable of communicating with a server that generates vehicle type sound field correction data using a plurality of uploaded vehicle type sound field measurement data. The program for measuring the sound field of the first vehicle and generating first sound field measurement data, the acquisition means for acquiring the vehicle type information of the vehicle that is the object of measurement, the first sound Transmitting means for transmitting the field measurement data and the vehicle type information to the server; the first sound field measurement data; and the sound of the second vehicle which is a vehicle different from the first vehicle and which is the vehicle type. And the second sound field measurement data generated by measuring the field, and the vehicle type sound field correction data corresponding to the vehicle type information generated on the basis of the second sound field measurement data from the server. Let By executing this program, the server can collect sound field measurement data from a plurality of portable terminals and generate and provide sound field correction data for each vehicle type. This program can be stored and handled in a storage medium.
　本発明の他の好適な実施形態では、携帯端末と通信可能なサーバは、複数の携帯端末から、車両の車種情報と当該車両の音場を測定して得られたデータである音場測定データをと受信する受信手段と、前記車種情報に基づき、前記音場測定データを車種別に分類する分類手段と、前記車種別に分類された複数の音場測定データに基づき、前記車種情報に対応する車種別補正データを生成する生成手段と、前記車種別補正データを当該車種情報を送信した携帯端末に対して送信する送信手段と、を有する。これにより、サーバは複数の携帯端末から音場測定データを収集し、車種別に音場補正データを生成して提供することができる。 In another preferred embodiment of the present invention, the server capable of communicating with the mobile terminal is a sound field measurement data which is data obtained by measuring the vehicle type information of the vehicle and the sound field of the vehicle from a plurality of mobile terminals. Receiving means, classification means for classifying the sound field measurement data into vehicle types based on the vehicle type information, and a vehicle corresponding to the vehicle type information based on a plurality of sound field measurement data classified into the vehicle types. A generation unit configured to generate type correction data; and a transmission unit configured to transmit the vehicle type correction data to the portable terminal that transmitted the vehicle type information. Accordingly, the server can collect sound field measurement data from a plurality of portable terminals, and generate and provide sound field correction data for each vehicle type.
　以下、図面を参照して本発明の好適な実施例について説明する。 Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
　［第１実施例］
　（構成）
　図１は、第１実施例に係る音場補正システムの全体構成を示す。サーバ１０と、車両７において使用される携帯端末２０とはネットワーク５を通じて通信可能となっている。ネットワーク５の典型的な例はインターネットである。 [First embodiment]
(Constitution)
FIG. 1 shows the overall configuration of the sound field correction system according to the first embodiment. The server 10 and the mobile terminal 20 used in the vehicle 7 can communicate with each other through the network 5. A typical example of the network 5 is the Internet.
　サーバ１０は、複数の携帯端末２０から車種別に車内音場の測定データを受信する。そして、サーバ１０は、車種ごとに車室用の音場補正データを生成して記憶し、車両７の携帯端末２０にその車両の音場補正データを送信する。 The server 10 receives in-vehicle sound field measurement data for each vehicle type from a plurality of portable terminals 20. And the server 10 produces | generates and memorize | stores the sound field correction data for vehicle interior for every vehicle type, and transmits the sound field correction data of the vehicle to the portable terminal 20 of the vehicle 7. FIG.
　車両７において、携帯端末２０は、音響機器である車載器３０に接続されている。携帯端末２０は、車室の音場特性の測定データをサーバ１０へ送信する。また、携帯端末２０はサーバ１０から音場補正データを受信し、車載器３０に転送する。転送された音場補正データは車載器３０に設定される。こうして、車載器３０により音楽を再生する際には、設定された音場補正データに基づいた音場補正が行われる。 In the vehicle 7, the portable terminal 20 is connected to the vehicle-mounted device 30 that is an acoustic device. The portable terminal 20 transmits the measurement data of the sound field characteristics of the passenger compartment to the server 10. In addition, the mobile terminal 20 receives the sound field correction data from the server 10 and transfers it to the vehicle-mounted device 30. The transferred sound field correction data is set in the vehicle-mounted device 30. Thus, when music is played by the vehicle-mounted device 30, sound field correction based on the set sound field correction data is performed.
　次に、サーバ１０について詳しく説明する。図２は、サーバ１０の内部構成を示す。サーバ１０は、通信部１１と、制御部１２と、記憶部１３と、補正データＤＢ（データベース）１４とを備える。 Next, the server 10 will be described in detail. FIG. 2 shows the internal configuration of the server 10. The server 10 includes a communication unit 11, a control unit 12, a storage unit 13, and a correction data DB (database) 14.
　通信部１１は、ネットワーク５を介して携帯端末２０と通信するためのユニットである。制御部１２は、サーバ１０の全体を制御する。制御部１２はＣＰＵなどのコンピュータにより構成され、予め用意されたプログラムを実行することにより各種の制御を行う。 The communication unit 11 is a unit for communicating with the mobile terminal 20 via the network 5. The control unit 12 controls the entire server 10. The control unit 12 includes a computer such as a CPU, and performs various controls by executing a program prepared in advance.
　記憶部１３は、ＲＯＭ、ＲＡＭ、ハードディスクなどにより構成され、制御部１２により実行される各種のプログラムを記憶している。また、記憶部１３は、制御部１２が各種の処理を行う際のワークメモリとしても機能する。 The storage unit 13 includes a ROM, a RAM, a hard disk, and the like, and stores various programs executed by the control unit 12. The storage unit 13 also functions as a work memory when the control unit 12 performs various processes.
　補正データＤＢ１４は、車両の車種ごとに音場補正データ（以下、単に「補正データ」と呼ぶ。）を記憶している。補正データは、車両７に搭載された音響機器に設定され、車内で音響機器が音楽を再生する際の車内の音場特性を補正するためのデータである。 The correction data DB 14 stores sound field correction data (hereinafter simply referred to as “correction data”) for each vehicle type. The correction data is data for correcting the sound field characteristics in the vehicle when the audio device reproduces music in the vehicle, which is set in the audio device mounted on the vehicle 7.
　図３は、補正データＤＢ１４の記憶内容の一例を示す。補正データＤＢ１４は、車種ごとに、その車両の車室において適切な音場補正を行うための補正データを記憶している。なお、好ましくは「車種」の情報には「車種名」に加えて「年式」も含まれる。 FIG. 3 shows an example of the contents stored in the correction data DB 14. The correction data DB 14 stores correction data for performing appropriate sound field correction in the vehicle compartment of each vehicle type. Preferably, the “vehicle type” information includes “year” in addition to “vehicle type name”.
　次に、車両７における構成について説明する。図４は、車両７における携帯端末２０及び車載器３０の構成を示す。携帯端末２０は車載器３０に接続されており、車載器３０は車両に搭載されたスピーカ３５に接続されている。なお、携帯端末２０と車載器３０はケーブルなどにより有線接続されていてもよく、Ｂｌｕｅｔｏｏｔｈ（登録商標）などにより無線接続されていてもよい。 Next, the configuration of the vehicle 7 will be described. FIG. 4 shows the configuration of the mobile terminal 20 and the vehicle-mounted device 30 in the vehicle 7. The portable terminal 20 is connected to the vehicle-mounted device 30, and the vehicle-mounted device 30 is connected to a speaker 35 mounted on the vehicle. Note that the mobile terminal 20 and the vehicle-mounted device 30 may be wired by a cable or the like, or may be wirelessly connected by Bluetooth (registered trademark) or the like.
　携帯端末２０は、通信部２１と、制御部２２と、記憶部２３と、タッチパネル２４と、マイク２５と、出力部２６とを備える。 The mobile terminal 20 includes a communication unit 21, a control unit 22, a storage unit 23, a touch panel 24, a microphone 25, and an output unit 26.
　通信部２１は、ネットワーク５を介してサーバ１０と通信するためのユニットである。制御部２２は、携帯端末２０の全体を制御する。制御部２２は、ＣＰＵなどのコンピュータにより構成され、予め用意されたプログラムを実行することにより各種の制御、特に後述する補正データ提供処理を行う。 The communication unit 21 is a unit for communicating with the server 10 via the network 5. The control unit 22 controls the entire mobile terminal 20. The control unit 22 is configured by a computer such as a CPU, and performs various types of control, particularly correction data provision processing described later, by executing a program prepared in advance.
　記憶部２３は、ＲＯＭ、ＲＡＭ、ハードディスクなどにより構成され、制御部２２により実行される各種のプログラムを記憶している。また、制御部２２は各種の処理を行う際のワークメモリとしても機能する。さらに、記憶部２３は、車内での音場測定に使用するテスト信号を記憶している。テスト信号Ｓｔは車内で音場測定を行う前にサーバ１０からダウンロードされ、記憶部２３に記憶されている。 The storage unit 23 includes a ROM, a RAM, a hard disk, and the like, and stores various programs executed by the control unit 22. The control unit 22 also functions as a work memory when performing various processes. Furthermore, the memory | storage part 23 has memorize | stored the test signal used for the sound field measurement in a vehicle. The test signal St is downloaded from the server 10 and stored in the storage unit 23 before the sound field is measured in the vehicle.
　タッチパネル２４は表示機能と入力機能とを併せ持つ。ユーザに対して表示される情報・画像はタッチパネル２４に表示され、ユーザがタッチパネルに指などでタッチすることにより行われる入力はタッチパネル２４により取得される。 The touch panel 24 has both a display function and an input function. Information / images displayed to the user are displayed on the touch panel 24, and input performed when the user touches the touch panel with a finger or the like is acquired by the touch panel 24.
　マイク２５は携帯端末２０に内蔵されているマイクである。また、出力部２６は、車両７において音場測定を行う際に、テスト信号Ｓｔを車載器３０に出力する。 The microphone 25 is a microphone built in the mobile terminal 20. The output unit 26 outputs a test signal St to the vehicle-mounted device 30 when the sound field measurement is performed in the vehicle 7.
　上記の構成において、通信部２１は本発明の送信手段、受信手段及び転送手段として機能し、制御部２２、マイク２５及び出力部２６は本発明の測定手段として機能し、タッチパネル２４は本発明の取得手段として機能する。また、出力部２６は本発明の出力手段として機能し、マイク２５は本発明の収音手段として機能する。 In the above configuration, the communication unit 21 functions as the transmission unit, reception unit, and transfer unit of the present invention, the control unit 22, the microphone 25, and the output unit 26 function as the measurement unit of the present invention, and the touch panel 24 of the present invention. It functions as an acquisition means. The output unit 26 functions as output means of the present invention, and the microphone 25 functions as sound collection means of the present invention.
　（音場測定の方法）
　次に、車両７の車内で行われる音場測定について説明する。音場測定においては、携帯端末２０は予め用意されたテスト信号Ｓｔを車載器３０に出力し、車載器３０はスピーカ３５によりテスト信号Ｓｔを再生して車室内にテスト音Ｓを出力する。なお、テスト信号Ｓｔは、音場特性として、インパルス応答、周波数特性、残響特性などを測定するために用意される信号である。 (Sound field measurement method)
Next, the sound field measurement performed inside the vehicle 7 will be described. In the sound field measurement, the mobile terminal 20 outputs a test signal St prepared in advance to the vehicle-mounted device 30, and the vehicle-mounted device 30 reproduces the test signal St through the speaker 35 and outputs the test sound S to the vehicle interior. Note that the test signal St is a signal prepared for measuring an impulse response, a frequency characteristic, a reverberation characteristic, and the like as the sound field characteristic.
　車室内に出力されたテスト音Ｓはマイク２５により収音され、一時的に記憶部２３に記憶される。制御部２２は、収音されたデータを測定データとして通信部２１を介してサーバ１０へ送信する。なお、携帯端末２０は、測定データをサーバ１０へ送信する際、車両７の車種情報を付加する。即ち、測定データは、その測定を行った車両の車種情報とともにサーバ１０にアップロードされる。 The test sound S output into the passenger compartment is picked up by the microphone 25 and temporarily stored in the storage unit 23. The control unit 22 transmits the collected data as measurement data to the server 10 via the communication unit 21. The portable terminal 20 adds the vehicle type information of the vehicle 7 when transmitting the measurement data to the server 10. That is, the measurement data is uploaded to the server 10 together with the vehicle type information of the vehicle that has performed the measurement.
　（補正データの生成方法）
　次に、サーバ１０において補正データを生成する方法について説明する。上記のように、複数の携帯端末２０が測定データをサーバ１０にアップロードすることにより、サーバ１０には多数の測定データが集められる。サーバ１０は、複数の車両の携帯端末２０からアップロードされた測定データを車種ごとに分類し、補正データを生成する。具体的には、サーバ１０は、同一の車種について複数の携帯端末２０からアップロードされた複数の測定データを同期加算することにより補正データを生成する。同期加算により、その車種に固有の音場特性が強調されるとともに、個々の車両における固有の特性や特性のバラツキは平滑化され、その車種の車室の音場特性を的確に表した補正データが得られる。 (Correction data generation method)
Next, a method for generating correction data in the server 10 will be described. As described above, when a plurality of portable terminals 20 upload measurement data to the server 10, a large number of measurement data is collected in the server 10. The server 10 classifies the measurement data uploaded from the mobile terminals 20 of a plurality of vehicles for each vehicle type, and generates correction data. Specifically, the server 10 generates correction data by synchronously adding a plurality of measurement data uploaded from a plurality of portable terminals 20 for the same vehicle type. Synchronous addition emphasizes the sound field characteristics unique to the vehicle model, and smoothes the characteristics and characteristic variations of individual vehicles, and correct data that accurately represents the sound field characteristics of the vehicle cabin of the vehicle model. Is obtained.
　基本的に、同期加算の対象とする測定データの数（以下、「サンプル数」とも呼ぶ。）が多いほど、正確な補正データを作成することができる。一方で、各車両７において、測定を繰り返し行ったり、長時間の測定を行うのはユーザの負担が大きい。そこで、各車両７では携帯端末２０は１回の測定により１つの測定データを取得してサーバ１０へアップロードすることとし、サーバ１０は複数の携帯端末２０から多数の測定データを取得することにより、同期加算の対象とするサンプル数を増加させる。これにより、各車両７における測定の負荷が過大となることと防止しつつ、多数のサンプルを収集して車種ごとに的確な補正データを生成することが可能となる。 Basically, as the number of measurement data to be subjected to synchronous addition (hereinafter also referred to as “number of samples”) increases, more accurate correction data can be created. On the other hand, in each vehicle 7, it is burdensome for the user to repeat the measurement or perform the measurement for a long time. Therefore, in each vehicle 7, the portable terminal 20 acquires one measurement data by one measurement and uploads it to the server 10, and the server 10 acquires a large number of measurement data from the plurality of portable terminals 20, Increase the number of samples for synchronous addition. This makes it possible to collect a large number of samples and generate accurate correction data for each vehicle type while preventing an excessive measurement load on each vehicle 7.
　なお、実際の音場補正の例としては、例えばタイムアライメント補正、周波数特性の補正、残響特性の補正などが挙げられる。タイムアライメント補正とは、車両に搭載された複数のスピーカと、車室における聴取位置との距離差を補正し、複数のスピーカから出力された音が同時に聴取位置に到達するようにする補正である。周波数特性の補正とは、基本的に車室内における周波数特性がフラットになるように、帯域毎のゲインを調整する補正である。残響特性の補正とは、車室における残響時間を適切な時間となるように調整する補正である。 Note that examples of actual sound field correction include time alignment correction, frequency characteristic correction, reverberation characteristic correction, and the like. The time alignment correction is a correction that corrects a difference in distance between a plurality of speakers mounted on the vehicle and a listening position in the passenger compartment so that sounds output from the plurality of speakers simultaneously reach the listening position. . The correction of the frequency characteristic is correction for adjusting the gain for each band so that the frequency characteristic in the passenger compartment is basically flat. The reverberation characteristic correction is correction for adjusting the reverberation time in the passenger compartment to an appropriate time.
　（補正データ提供処理）
　次に、補正データ提供処理について説明する。図５は第１実施例による補正データ提供処理のフローチャートである。この処理は、主としてサーバ１０の制御部１２と携帯端末２０の制御部２２が予め用意されたプログラムを実行することにより行われる。 (Correction data provision process)
Next, the correction data providing process will be described. FIG. 5 is a flowchart of the correction data providing process according to the first embodiment. This process is performed mainly by the control unit 12 of the server 10 and the control unit 22 of the mobile terminal 20 executing a prepared program.
　まず、携帯端末２０において、ユーザがタッチパネル２４を操作して車両７の車種情報を入力し、携帯端末２０はこれを取得する（ステップＳ１１）。次に、携帯端末２０は、車室内で上述のように音場測定を行い、測定データを生成する（ステップＳ１２）。そして、携帯端末２０は、車種情報と測定データをサーバ１０へ送信する（ステップＳ１３）。 First, in the mobile terminal 20, the user operates the touch panel 24 to input the vehicle type information of the vehicle 7, and the mobile terminal 20 acquires this (step S11). Next, the portable terminal 20 performs the sound field measurement in the vehicle interior as described above, and generates measurement data (step S12). And the portable terminal 20 transmits vehicle type information and measurement data to the server 10 (step S13).
　サーバ１０は、車種情報に基づいて、補正データＤＢ１４に既に記憶されている同一車種の測定データ、即ち、それまでに他の車両７の携帯端末２０から送信された測定データを抽出する。そして、ステップＳ１３で受信した測定データと補正データＤＢ１４から抽出した測定データを利用して上述のように同期加算を行って補正データを生成し（ステップＳ１４）、その補正データを携帯端末２０へ送信する（ステップＳ１５）。 The server 10 extracts the measurement data of the same vehicle type already stored in the correction data DB 14 based on the vehicle type information, that is, the measurement data transmitted from the mobile terminal 20 of the other vehicle 7 until then. Then, using the measurement data received in step S13 and the measurement data extracted from the correction data DB 14, synchronous addition is performed as described above to generate correction data (step S14), and the correction data is transmitted to the portable terminal 20. (Step S15).
　携帯端末２０は、補正データを受信すると、車両７内の車載器３０へ転送する（ステップＳ１６）。これにより、車載器３０には、サーバ１０から送信された補正データが設定される。よって、車載器３０により再生される音楽は、補正データに基づいてその車種に適した音場補正がなされたものとなる。 When the mobile terminal 20 receives the correction data, the mobile terminal 20 transfers the correction data to the vehicle-mounted device 30 in the vehicle 7 (step S16). Thereby, the correction data transmitted from the server 10 is set in the vehicle-mounted device 30. Therefore, the music reproduced by the vehicle-mounted device 30 is subjected to sound field correction suitable for the vehicle type based on the correction data.
　以上のように、第１実施例によれば、サーバ１０は、複数の車両７において測定された測定データを各携帯端末２０から収集し、多数のサンプル数の測定データを使用して同期加算を行って補正データを生成する。よって、各車両における測定時間を短くすることができ、そのためユーザは音場測定中に車内にいることできる。こうして、各車両における測定の負担を軽減しつつ、車両の種類に適合した音場補正データを生成することができる。 As described above, according to the first embodiment, the server 10 collects measurement data measured in the plurality of vehicles 7 from each portable terminal 20 and performs synchronous addition using measurement data of a large number of samples. To generate correction data. Therefore, the measurement time in each vehicle can be shortened, so that the user can be in the vehicle during the sound field measurement. Thus, sound field correction data suitable for the type of vehicle can be generated while reducing the measurement burden on each vehicle.
　（変形例）
　上記の例では、携帯端末２０から車種情報をサーバ１０へ送信し、サーバ１０は車種ごとに補正データを生成して携帯端末２０に提供している。これに加えて、車両で使用されている車載器の情報も携帯端末２０からサーバ１０へ送信し、サーバ１０は車種ごと、かつ、車載器３０の種類ごとに補正データを生成して携帯端末２０へ提供してもよい。 (Modification)
In the above example, the vehicle type information is transmitted from the mobile terminal 20 to the server 10, and the server 10 generates correction data for each vehicle type and provides it to the mobile terminal 20. In addition to this, information on the vehicle-mounted device used in the vehicle is also transmitted from the portable terminal 20 to the server 10, and the server 10 generates correction data for each vehicle type and each type of the vehicle-mounted device 30 to generate the portable terminal 20. May be provided.
　［第２実施例］
　第２実施例は、音場補正のために複数の測定項目がある場合の処理に関するものである。いま、音場補正のための測定項目として測定項目Ａ～Ｃの３つがあるとする。例えば、測定項目Ａはインパルス応答、測定項目Ｂは周波数特性、測定項目Ｃは残響特性としてもよい。この場合、サーバ１０は、各測定項目について、車種ごとに複数の携帯端末２０から測定データを受信して同期加算により補正データを生成するのであるが、前述のように測定データのサンプル数が不足していると、生成される補正データの精度を確保することが難しい。そこで、サーバ１０は、測定項目ごとに、収集できた測定データのサンプル数を記憶部１３に記憶しておき、サンプル数が不足している測定項目（以下、「サンプル不足項目」と呼ぶ。）を携帯端末２０に通知してその測定項目についての測定データを要求する。 [Second Embodiment]
The second embodiment relates to processing when there are a plurality of measurement items for sound field correction. Assume that there are three measurement items A to C as measurement items for sound field correction. For example, the measurement item A may be an impulse response, the measurement item B may be a frequency characteristic, and the measurement item C may be a reverberation characteristic. In this case, for each measurement item, the server 10 receives measurement data from a plurality of portable terminals 20 for each vehicle type and generates correction data by synchronous addition, but the number of measurement data samples is insufficient as described above. If so, it is difficult to ensure the accuracy of the generated correction data. Therefore, the server 10 stores the number of measurement data samples collected for each measurement item in the storage unit 13, and the measurement item for which the number of samples is insufficient (hereinafter referred to as "sample shortage item"). To the portable terminal 20 to request measurement data for the measurement item.
　図６は、サーバ１０の記憶部１３に記憶される測定項目別のサンプル数の例である。車種ごとに、測定項目Ａ～Ｃについて既に得られている測定データのサンプル数が記憶されている。いま、作成される補正データの精度を確保するために５０以上のサンプル数が必要であると仮定すると、図６中のサンプル数が５０未満である測定項目（数値に下線を伏して示す）はサンプル不足項目となる。よって、サーバ１０は、サンプル不足項目を有する車種の車両について、サンプル不足項目を通知して測定データの送信を要求する。これにより、サーバ１０は、サンプル不足項目について測定データの収集を促進し、携帯端末２０に提供する補正データの精度を確保することが可能となる。 FIG. 6 is an example of the number of samples for each measurement item stored in the storage unit 13 of the server 10. For each vehicle type, the number of measurement data samples already obtained for the measurement items A to C is stored. Assuming that the number of samples of 50 or more is necessary in order to ensure the accuracy of the correction data to be created, the measurement item having the number of samples in FIG. This is a sample shortage item. Therefore, the server 10 notifies the sample shortage item and requests transmission of measurement data for the vehicle of the vehicle type having the sample shortage item. As a result, the server 10 can facilitate the collection of measurement data for the sample shortage items and ensure the accuracy of the correction data provided to the mobile terminal 20.
　図７は、第２実施例における補正データ提供処理のフローチャートである。まず、携帯端末２０において、ユーザがタッチパネル２４を操作して車両７の車種情報を入力すると、携帯端末２０はこれを取得し（ステップＳ２１）、サーバ１０へ送信する（ステップＳ２２）。 FIG. 7 is a flowchart of the correction data providing process in the second embodiment. First, in the portable terminal 20, when a user operates the touch panel 24 and inputs the vehicle type information of the vehicle 7, the portable terminal 20 acquires this (step S21) and transmits it to the server 10 (step S22).
　サーバ１０は、車種情報を受信すると、図６に例示したような測定項目別のサンプル数を参照し、その車種についてのサンプル不足項目を特定する（ステップＳ２３）。そして、サーバ１０は、特定したサンプル不足項目を携帯端末２０に通知する（ステップＳ２４）。 When the server 10 receives the vehicle type information, the server 10 refers to the number of samples for each measurement item as illustrated in FIG. 6 and identifies a sample shortage item for the vehicle type (step S23). Then, the server 10 notifies the portable terminal 20 of the specified sample shortage item (step S24).
　携帯端末２０は、サンプル不足項目の通知を受け取り、その測定項目について測定を行って測定データを生成し（ステップＳ２５）、サーバ１０へ送信する（ステップＳ２６）。 The mobile terminal 20 receives the notification of the sample shortage item, performs measurement on the measurement item, generates measurement data (step S25), and transmits the measurement data to the server 10 (step S26).
　サーバ１０は、送信された測定データを使用して当該サンプル不足項目についての補正データを生成して補正データＤＢ１４に記憶する（ステップＳ２７）。そして、サーバ１０は、その車種に関する補正データ（本例では測定項目Ａ～Ｃについての補正データ）を補正データＤＢ１４から取得し、携帯端末２０へ送信する（ステップＳ２８）。これにより、サンプル不足項目については、ステップＳ２６で携帯端末２０から送信された測定データを利用して新たに作成された補正データが携帯端末２０へ送信されることになる。 The server 10 generates correction data for the sample shortage item using the transmitted measurement data and stores it in the correction data DB 14 (step S27). Then, the server 10 acquires correction data relating to the vehicle type (in this example, correction data for the measurement items A to C) from the correction data DB 14 and transmits the correction data to the portable terminal 20 (step S28). As a result, for the sample shortage item, correction data newly created using the measurement data transmitted from the mobile terminal 20 in step S26 is transmitted to the mobile terminal 20.
　そして、携帯端末２０は、補正データを受信すると、車両７内の車載器３０へ転送する（ステップＳ２９）。これにより、車載器３０には、サーバ１０から送信された補正データが設定される。よって、車載器３０により再生される音楽は、補正データに基づいてその車種に適した音場補正がなされたものとなる。 And the portable terminal 20 will transfer to the onboard equipment 30 in the vehicle 7, if correction data are received (step S29). Thereby, the correction data transmitted from the server 10 is set in the vehicle-mounted device 30. Therefore, the music reproduced by the vehicle-mounted device 30 is subjected to sound field correction suitable for the vehicle type based on the correction data.
　なお、サーバ１０は上記のように測定データが不足しているサンプル不足項目を携帯端末２０に通知するだけでなく、このサンプル不足項目を測定するためのテスト音を携帯端末２０に送信してもよい。テスト音はサンプル不足項目に応じて、インパルス応答、周波数特性、残響特性などを測定するために用意された信号とする。例えば、サンプル不足項目が測定項目Ａである場合は、サーバ１０は、テスト音としてインパルス応答を測定するための信号を送信する。同様に、サンプル不足項目が測定項目Ｂである場合は、サーバ１０は、テスト音として周波数特性を測定するための信号を送信する。 Note that the server 10 not only notifies the portable terminal 20 of the sample shortage item for which the measurement data is lacking as described above, but also transmits a test sound for measuring the sample shortage item to the portable terminal 20. Good. The test sound is a signal prepared for measuring an impulse response, a frequency characteristic, a reverberation characteristic, etc. according to a sample shortage item. For example, when the sample shortage item is the measurement item A, the server 10 transmits a signal for measuring the impulse response as the test sound. Similarly, when the sample shortage item is the measurement item B, the server 10 transmits a signal for measuring frequency characteristics as a test sound.
　以上のように、第２実施例によれば、サーバ１０は、サンプル数が不足している測定項目を携帯端末２０に通知して、その測定項目についての測定データの収集を促進する。このため、サーバ１０は補正データの精度を確保するために必要なサンプル数の測定データを迅速に収集することができ、携帯端末２０に提供される補正データの精度を迅速に確保することが可能となる。 As described above, according to the second embodiment, the server 10 notifies the portable terminal 20 of the measurement item for which the number of samples is insufficient, and promotes the collection of measurement data for the measurement item. For this reason, the server 10 can quickly collect measurement data of the number of samples necessary to ensure the accuracy of the correction data, and can quickly ensure the accuracy of the correction data provided to the mobile terminal 20. It becomes.
　［第３実施例］
　第３実施例は、車両７で音場測定に使用される携帯端末２０の測定における適正度を考慮して補正データを作成するものである。車両７では多種の携帯端末２０が使用され、内蔵するマイク２５の性能も異なる。よって、性能の低いマイク２５を備える携帯端末２０で測定された測定データは、サーバ１０側での補正データ作成に不適当なこともある。 [Third embodiment]
In the third embodiment, correction data is generated in consideration of the appropriateness in the measurement of the mobile terminal 20 used for the sound field measurement in the vehicle 7. In the vehicle 7, various portable terminals 20 are used, and the performance of the built-in microphone 25 is also different. Therefore, the measurement data measured by the portable terminal 20 including the low-performance microphone 25 may be inappropriate for creating correction data on the server 10 side.
　そこで、第３実施例では、携帯端末２０が測定データをサーバ１０へアップロードする際、その携帯端末２０の機種情報も送信する。サーバ１０では、車種ごと、かつ、携帯端末２０の機種毎に補正データを作成し、各車種について各携帯端末２０の適正度を評価する。 Therefore, in the third embodiment, when the mobile terminal 20 uploads the measurement data to the server 10, the model information of the mobile terminal 20 is also transmitted. The server 10 creates correction data for each vehicle type and for each model of the mobile terminal 20, and evaluates the appropriateness of each mobile terminal 20 for each vehicle type.
　図８は、携帯端末２０の評価結果の一例を示す。携帯端末２０と車種との組合せに対して車種別適正度が決定される。車種別適正度は、その携帯端末２０と車種との相性を示すものと考えることもできる。そして、全ての車種についての車種別適正度を総合して、その携帯端末２０に対する総合適正度が決定される。なお、これらの評価は、基本的には各携帯端末２０を用いて生成された補正データの値の分布を生成し、偏差値を算出することにより行われる。即ち、得られた補正データの値が標準値に近い場合には適正度は高く、標準値から遠い場合には適正度は低いと判定される。例えば、音場補正としてタイムアライメントの補正を行う際、補正データは最も遠いスピーカからの遅延量で与えられる。よって、各携帯端末と車種との組合せについて補正データとして遅延量を算出し、その分布に基づいて適正度を決定する。図８の例では、補正データの値が標準値に近いか否かに基づいて、適正度をＡ～Ｃランクの３段階で決定している。なお、適正度Ａランクが最も標準値に近く、適正度Ｃランクは最も標準値から遠いものとする。 FIG. 8 shows an example of the evaluation result of the mobile terminal 20. The appropriateness of the vehicle type is determined for the combination of the portable terminal 20 and the vehicle type. The appropriateness for each vehicle type can be considered to indicate the compatibility between the mobile terminal 20 and the vehicle type. Then, the overall suitability for the mobile terminal 20 is determined by summing up the suitability of each vehicle type. Note that these evaluations are basically performed by generating a distribution of correction data values generated using each mobile terminal 20 and calculating a deviation value. That is, it is determined that the appropriateness is high when the value of the obtained correction data is close to the standard value, and the appropriateness is low when it is far from the standard value. For example, when performing time alignment correction as sound field correction, the correction data is given as a delay amount from the farthest speaker. Therefore, the delay amount is calculated as the correction data for each combination of the mobile terminal and the vehicle type, and the appropriateness is determined based on the distribution. In the example of FIG. 8, the appropriateness is determined in three stages of ranks A to C based on whether or not the value of the correction data is close to the standard value. The appropriateness A rank is the closest to the standard value, and the appropriateness C rank is the farthest from the standard value.
　サーバ１０は、車種別適正度及び総合適正度を算出し、これを考慮して最終的に補正データＤＢ１４に記憶する補正データを作成する。一例では、総合適正度がＣランクである携帯端末２０から取得した測定データは、補正データの生成に使用しないこととする。他の例では、総合適正度に応じて重み付けをして測定データを使用する。例えば、総合適正度がＡランクの携帯端末２０から取得した測定データには重み値「２」を付与し、総合適正度がＢランクの携帯端末２０から取得した測定データには重み値「１」を付与し、総合適正度がＣランクの携帯端末２０から取得した測定データには重み値「０．５」を付与して補正データを生成する。このように、測定データをアップロードする携帯端末２０毎に適正度を評価し、適正度を考慮して補正データを生成することにより、携帯端末２０の性能差の影響を受けずに精度の高い補正データを生成することが可能となる。 The server 10 calculates the appropriateness of the vehicle type and the overall appropriateness, and creates correction data to be finally stored in the correction data DB 14 in consideration of this. In one example, the measurement data acquired from the mobile terminal 20 whose overall suitability is C rank is not used for generation of correction data. In another example, the measurement data is used by weighting according to the total suitability. For example, the weight value “2” is assigned to the measurement data acquired from the mobile terminal 20 with the overall suitability level A rank, and the weight value “1” is assigned to the measurement data acquired from the mobile terminal 20 with the overall suitability degree B rank. And the correction data is generated by assigning a weight value “0.5” to the measurement data acquired from the mobile terminal 20 having the overall suitability C rank. As described above, the appropriateness is evaluated for each mobile terminal 20 that uploads the measurement data, and the correction data is generated in consideration of the appropriateness, so that highly accurate correction is not affected by the performance difference of the mobile terminal 20. Data can be generated.
　なお、上記の例では、適正度をＡ～Ｃの３ランクで設定し、それぞれに重み値を設定しているが、本発明の適用はこれには限られない。代わりに、例えば適正度を０～１の数値で設定し（「０」は適正度が最低、「１」は適正度が最高）、その値を重み値として使用してもよい。 In the above example, the appropriateness is set in three ranks A to C, and the weight value is set for each. However, the application of the present invention is not limited to this. Instead, for example, the appropriateness may be set as a numerical value from 0 to 1 (“0” is the lowest appropriateness, “1” is the highest appropriateness), and the value may be used as the weight value.
　図９は第３実施例による補正データ提供処理のフローチャートである。まず、携帯端末２０において、ユーザがタッチパネル２４を操作して車両７の車種情報を入力し、携帯端末２０はこれを取得する（ステップＳ３１）。次に、携帯端末２０は、携帯端末２０の機種情報を取得する（ステップＳ３２）。具体的には、携帯端末２０の記憶部２３にその携帯端末２０の型番などの機種情報が記憶されている場合には、携帯端末２０は単にその機種情報を読み出せばよい。一方、記憶部２３などに機種情報が記憶されていない場合には、携帯端末２０はユーザに機種情報の入力を要求し、ユーザがタッチパネル２４を操作して入力した機種情報を取得する。 FIG. 9 is a flowchart of the correction data providing process according to the third embodiment. First, in the mobile terminal 20, the user operates the touch panel 24 to input the vehicle type information of the vehicle 7, and the mobile terminal 20 acquires this (step S31). Next, the mobile terminal 20 acquires model information of the mobile terminal 20 (step S32). Specifically, when model information such as the model number of the mobile terminal 20 is stored in the storage unit 23 of the mobile terminal 20, the mobile terminal 20 simply reads the model information. On the other hand, when the model information is not stored in the storage unit 23 or the like, the mobile terminal 20 requests the user to input the model information, and acquires the model information input by the user operating the touch panel 24.
　次に、携帯端末２０は、車室内で上述のように音場測定を行い、測定データを生成する（ステップＳ３３）。そして、携帯端末２０は、車種情報と、機種情報と、測定データとをサーバ１０へ送信する（ステップＳ３４）。 Next, the mobile terminal 20 performs the sound field measurement in the passenger compartment as described above, and generates measurement data (step S33). And the portable terminal 20 transmits vehicle type information, model information, and measurement data to the server 10 (step S34).
　サーバ１０は、車種情報に基づいて、補正データＤＢ１４に既に記憶されている同一車種の測定データ、即ち、それまでに他の車両７の携帯端末２０から送信された測定データを抽出する。そして、ステップＳ３４で受信した測定データと補正データＤＢ１４から抽出した測定データを利用して上述のように同期加算を行って補正データを生成する（ステップＳ３５）。この際、サーバ１０は上述のように、受信した携帯端末２０の機種情報に基づいてその携帯端末２０の適正度を参照し、必要な重み付けなどを行って補正データを生成する。そして、サーバ１０は、生成した補正データを携帯端末２０へ送信する（ステップＳ３６）。 The server 10 extracts the measurement data of the same vehicle type already stored in the correction data DB 14 based on the vehicle type information, that is, the measurement data transmitted from the mobile terminal 20 of the other vehicle 7 until then. Then, using the measurement data received in step S34 and the measurement data extracted from the correction data DB 14, synchronous addition is performed as described above to generate correction data (step S35). At this time, as described above, the server 10 refers to the appropriateness of the mobile terminal 20 based on the received model information of the mobile terminal 20, performs necessary weighting, and generates correction data. Then, the server 10 transmits the generated correction data to the mobile terminal 20 (step S36).
　携帯端末２０は、補正データを受信すると、車両７内の車載器３０へ転送する（ステップＳ３７）。これにより、車載器３０には、サーバ１０から送信された補正データが設定される。よって、車載器３０により再生される音楽は、補正データに基づいてその車種に適した音場補正がなされたものとなる。 When the mobile terminal 20 receives the correction data, the mobile terminal 20 transfers the correction data to the vehicle-mounted device 30 in the vehicle 7 (step S37). Thereby, the correction data transmitted from the server 10 is set in the vehicle-mounted device 30. Therefore, the music reproduced by the vehicle-mounted device 30 is subjected to sound field correction suitable for the vehicle type based on the correction data.
　以上のように、第３実施例によれば、サーバ１０は、測定データを生成して送信する携帯端末２０の性能差の影響を排除して精度の高い補正データを生成することができ、携帯端末２０もそのような精度の高い補正データに基づいて車室内の音場補正を行うことができる。 As described above, according to the third embodiment, the server 10 can generate highly accurate correction data by eliminating the influence of the performance difference of the mobile terminal 20 that generates and transmits measurement data. The terminal 20 can also correct the sound field in the passenger compartment based on such highly accurate correction data.
　［第４実施例］
　第４実施例は、車両７で音場測定を行った際の車室内における位置に応じて補正データを作成するものである。車両７で音場測定を行う際、測定位置（即ち、聴取位置）は携帯端末２０を配置した位置となる。即ち、携帯端末２０を運転席に配置して音場測定を行えば、得られたデータは運転席を聴取位置とする測定データとなり、携帯端末２０を助手席に設置して音場測定を行えば、得られた測定データは助手席を聴取位置とする測定データとなる。よって、第４実施例では、携帯端末２０は測定データをサーバ１０へアップロードする際に、測定位置を示す位置情報を一緒に送信する。サーバ１０は、複数の携帯端末２０から収集した測定データを測定位置毎に分類し、測定位置毎に補正データを生成する。 [Fourth embodiment]
In the fourth embodiment, correction data is created according to the position in the passenger compartment when the sound field is measured by the vehicle 7. When the sound field measurement is performed with the vehicle 7, the measurement position (that is, the listening position) is the position where the mobile terminal 20 is disposed. That is, if the mobile terminal 20 is placed in the driver's seat and the sound field is measured, the obtained data becomes measurement data with the driver's seat as the listening position, and the mobile terminal 20 is installed in the passenger seat and the sound field is measured. For example, the obtained measurement data is measurement data with the passenger seat as the listening position. Therefore, in the fourth example, when the portable terminal 20 uploads the measurement data to the server 10, it transmits the position information indicating the measurement position together. The server 10 classifies the measurement data collected from the plurality of mobile terminals 20 for each measurement position, and generates correction data for each measurement position.
　図１０は、車室の測定位置毎に補正データを生成した場合の補正データＤＢ１４に記憶される補正データの例を示す。この例では、測定位置として、運転席、助手席、後席（後部座席）の３つを使用している。なお、実際には、ユーザがこれらの座席に座って携帯端末２０を頭部付近で保持した状態で測定を行うことになる。 FIG. 10 shows an example of correction data stored in the correction data DB 14 when correction data is generated for each measurement position in the passenger compartment. In this example, three driver positions, a passenger seat, and a rear seat (rear seat) are used as measurement positions. Actually, the measurement is performed with the user sitting on these seats and holding the portable terminal 20 near the head.
　このように、車室内の測定位置ごとに携帯端末２０からサーバ１０へ測定データをアップロードし、サーバ１０が測定位置ごとに補正データを生成することにより、車室内における実際のユーザの聴取位置を考慮した高精度な音場補正が可能となる。 In this way, the measurement data is uploaded from the portable terminal 20 to the server 10 for each measurement position in the vehicle interior, and the server 10 generates correction data for each measurement position, thereby taking into account the actual listening position of the user in the vehicle interior. The sound field can be corrected with high accuracy.
　なお、図１０の例では、測定位置を運転席、助手席、後席の３つに分類しているが、本発明の適用はこれには限られない。例えば、後席をさらに後部左座席と後部右座席に分けてもよい。また、別の分類方法として、運転席、助手席、前席、後席、全席に分類してもよい。この場合、「前席」は測定位置（＝聴取位置）が運転席と助手席の間にある場合を指し、「後席」は測定位置が後部左座席と後部右座席の間にある場合を指し、「全席」は測定位置が車室のほぼ中央（前席と後席の間、かつ、左右の座席の間）にある場合を指す。 In the example of FIG. 10, the measurement positions are classified into the driver seat, the passenger seat, and the rear seat, but the application of the present invention is not limited to this. For example, the rear seat may be further divided into a rear left seat and a rear right seat. As another classification method, the driver seat, the passenger seat, the front seat, the rear seat, and all seats may be classified. In this case, “front seat” refers to the case where the measurement position (= listening position) is between the driver seat and the passenger seat, and “rear seat” refers to the case where the measurement position is between the rear left seat and the rear right seat. “All seats” refers to the case where the measurement position is approximately in the center of the passenger compartment (between the front and rear seats and between the left and right seats).
　図１１は第４実施例による補正データ提供処理のフローチャートである。まず、携帯端末２０において、ユーザがタッチパネル２４を操作して車両７の車種情報を入力し、携帯端末２０はこれを取得する（ステップＳ４１）。次に、携帯端末２０は、測定位置情報を取得する（ステップＳ４２）。具体的には、携帯端末２０はユーザに測定位置の入力を要求し、ユーザがタッチパネル２４を操作して入力した測定位置を測定位置情報として取得する。 FIG. 11 is a flowchart of correction data providing processing according to the fourth embodiment. First, in the mobile terminal 20, the user operates the touch panel 24 to input the vehicle type information of the vehicle 7, and the mobile terminal 20 acquires this (step S41). Next, the portable terminal 20 acquires measurement position information (step S42). Specifically, the portable terminal 20 requests the user to input a measurement position, and acquires the measurement position input by the user operating the touch panel 24 as measurement position information.
　次に、携帯端末２０は、車室内で上述のように音場測定を行い、測定データを生成する（ステップＳ４３）。そして、携帯端末２０は、車種情報と、測定位置情報と、測定データとをサーバ１０へ送信する（ステップＳ４４）。 Next, the portable terminal 20 performs the sound field measurement in the vehicle interior as described above, and generates measurement data (step S43). And the portable terminal 20 transmits vehicle type information, measurement position information, and measurement data to the server 10 (step S44).
　サーバ１０は、車種情報に基づいて、補正データＤＢ１４に既に記憶されている同一車種の測定データ、即ち、それまでに他の車両７の携帯端末２０から送信された測定データを抽出する。そして、ステップＳ４４で受信した測定データと補正データＤＢ１４から抽出した測定データを利用して上述のように同期加算を行って補正データを生成する（ステップＳ４５）。この際、サーバ１０は上述のように、ステップＳ４４で取得した測定位置について、補正データを生成する。そして、サーバ１０は、生成した補正データを携帯端末２０へ送信する（ステップＳ４６）。 The server 10 extracts the measurement data of the same vehicle type already stored in the correction data DB 14 based on the vehicle type information, that is, the measurement data transmitted from the mobile terminal 20 of the other vehicle 7 until then. Then, using the measurement data received in step S44 and the measurement data extracted from the correction data DB 14, synchronous addition is performed as described above to generate correction data (step S45). At this time, as described above, the server 10 generates correction data for the measurement position acquired in step S44. Then, the server 10 transmits the generated correction data to the mobile terminal 20 (step S46).
　携帯端末２０は、補正データを受信すると、車両７内の車載器３０へ転送する（ステップＳ４７）。これにより、車載器３０には、サーバ１０から送信された補正データが設定される。よって、車載器３０により再生される音楽は、補正データに基づいてその車種に適した音場補正がなされたものとなる。 When receiving the correction data, the portable terminal 20 transfers the correction data to the vehicle-mounted device 30 in the vehicle 7 (step S47). Thereby, the correction data transmitted from the server 10 is set in the vehicle-mounted device 30. Therefore, the music reproduced by the vehicle-mounted device 30 is subjected to sound field correction suitable for the vehicle type based on the correction data.
　以上のように、第４実施例によれば、サーバ１０は、測定位置ごとに補正データを生成して提供することができるので、車室内の聴取位置に応じて最適な音場補正を行うことができる。 As described above, according to the fourth embodiment, the server 10 can generate and provide correction data for each measurement position, so that the optimum sound field correction is performed according to the listening position in the passenger compartment. Can do.
　［第５実施例］
　第５実施例は、サーバ１０で補正データを作成する際の測定データのサンプル数が不足している場合に、サーバ１０はまずその不足した数で補正データを作成して携帯端末２０に提供し、その後に必要なサンプル数が得られたときに再度補正データを作成してその携帯端末２０へ送信するものである。 [Fifth embodiment]
In the fifth embodiment, when the number of measurement data samples when the correction data is created in the server 10 is insufficient, the server 10 first creates correction data with the insufficient number and provides the correction data to the portable terminal 20. Thereafter, when the necessary number of samples is obtained, correction data is generated again and transmitted to the portable terminal 20.
　前述のように、測定データのサンプル数が十分な場合にはサーバ１０で生成される補正データの精度が確保できるが、測定データのサンプル数が少ない場合には生成される補正データの精度を確保することは難しい。しかしながら、サーバ１０が十分なサンプル数の測定データが得られるまで補正データを提供しないこととすると、ユーザ側としてはせっかく音場測定を行って測定データをサーバ１０にアップロードしたのに補正データの提供を受けられないこととなり、測定データをアップロードしようという意欲が低下してしまう。 As described above, when the number of measurement data samples is sufficient, the accuracy of the correction data generated by the server 10 can be ensured. However, when the number of measurement data samples is small, the accuracy of the correction data generated is ensured. Difficult to do. However, if the server 10 does not provide the correction data until a sufficient number of samples of measurement data are obtained, the user provides the correction data even though the user has performed the sound field measurement and uploaded the measurement data to the server 10. Will not be accepted, and willingness to upload measurement data will be reduced.
　そこで、第５実施例では、サーバ１０は、サンプル数が不足している状態であっても、まずは補正データを生成して携帯端末２０へ提供する。但し、その時点で提供した補正データは精度が必ずしも十分とは言えないので、その後に十分なサンプル数が得られて精度の高い補正データが生成できた時点で、その精度の高い補正データを改めて携帯端末２０へ提供する。こうすることにより、ユーザからの測定データの収集を促進し、サーバ１０から早期に精度の高い補正データを提供できるようにする。 Therefore, in the fifth embodiment, the server 10 first generates correction data and provides it to the portable terminal 20 even when the number of samples is insufficient. However, the correction data provided at that time is not necessarily accurate enough, so when a sufficient number of samples are obtained and high-precision correction data can be generated, the high-precision correction data is renewed. Provide to the mobile terminal 20. In this way, collection of measurement data from the user is facilitated, and correction data with high accuracy can be provided from the server 10 at an early stage.
　図１２は、第５実施例において、サーバ１０の補正データＤＢ１４に記憶されるデータの例である。車種に対応付けて、その時点で生成されている補正データが記憶されるとともに、その補正データを生成した際に使用した測定データのサンプル数が記憶される。いま、十分な精度の補正データを生成するために必要な測定データのサンプル数を「５０」と仮定する。即ち、測定データのサンプル数が５０以下である状態はサンプル数が不足している状態となる（図１２では、不足状態のサンプル数に下線を付している）。そこで、サンプル数が不足している状態で生成された補正データ（以下、「サンプル不足補正データ」と呼ぶ。）については、それを提供した携帯端末２０の端末ＩＤを対応付けて記憶しておく。図１２の例では、車種「Ａ社ＡＡＡ　２０１２～現在」については、測定データのサンプル数が「１５」であり、その補正データはサンプル数不足補正データであるので、サーバ１０はそのサンプル数不足補正データを提供した際に提供先の端末ＩＤを記憶しておく。そして、その後に測定データのサンプル数が「５０」を超え、一定の精度が確保された補正データが生成できた際に、提供先端末ＩＤとして記憶されている携帯端末２０に改めて提供する。 FIG. 12 is an example of data stored in the correction data DB 14 of the server 10 in the fifth embodiment. The correction data generated at that time is stored in association with the vehicle type, and the number of samples of measurement data used when the correction data is generated is stored. Now, it is assumed that the number of measurement data samples necessary to generate correction data with sufficient accuracy is “50”. That is, when the number of measurement data samples is 50 or less, the number of samples is insufficient (in FIG. 12, the number of samples in the insufficient state is underlined). Therefore, correction data generated in a state where the number of samples is insufficient (hereinafter referred to as “sample shortage correction data”) is stored in association with the terminal ID of the mobile terminal 20 that provided the correction data. . In the example of FIG. 12, for the vehicle type “A company AAA 2012 to present”, the number of measurement data samples is “15”, and the correction data is insufficient sample number correction data. When the correction data is provided, the terminal ID of the provision destination is stored. Then, when the number of measurement data samples exceeds “50” and correction data with a certain level of accuracy can be generated, the correction data is provided again to the portable terminal 20 stored as the provision destination terminal ID.
　図１３は第５実施例による補正データ提供処理のフローチャートである。まず、携帯端末２０において、ユーザがタッチパネル２４を操作して車両７の車種情報を入力し、携帯端末２０はこれを取得する（ステップＳ５１）。 FIG. 13 is a flowchart of the correction data providing process according to the fifth embodiment. First, in the mobile terminal 20, the user operates the touch panel 24 to input the vehicle type information of the vehicle 7, and the mobile terminal 20 acquires this (step S51).
　次に、携帯端末２０は、車室内で上述のように音場測定を行い、測定データを生成する（ステップＳ５２）。そして、携帯端末２０は、車種情報と測定データとをサーバ１０へ送信する（ステップＳ５３）。 Next, the portable terminal 20 performs the sound field measurement in the vehicle interior as described above, and generates measurement data (step S52). And the portable terminal 20 transmits vehicle type information and measurement data to the server 10 (step S53).
　サーバ１０は、車種情報に基づいて、補正データＤＢ１４に既に記憶されている同一車種の測定データ、即ち、それまでに他の車両７の携帯端末２０から送信された測定データを抽出する。そして、ステップＳ５３で受信した測定データと補正データＤＢ１４から抽出した測定データを利用して上述のように同期加算を行って補正データを生成する（ステップＳ５４）。この際、サーバ１０は、補正データの作成に使用した測定データのサンプル数を参照し、サンプル数が足りているか、即ち、生成した補正データがサンプル数不足補正データに該当するか否かを判定する（ステップＳ５５）。 The server 10 extracts the measurement data of the same vehicle type already stored in the correction data DB 14 based on the vehicle type information, that is, the measurement data transmitted from the mobile terminal 20 of the other vehicle 7 until then. Then, using the measurement data received in step S53 and the measurement data extracted from the correction data DB 14, synchronous addition is performed as described above to generate correction data (step S54). At this time, the server 10 refers to the number of samples of the measurement data used to create the correction data, and determines whether the number of samples is sufficient, that is, whether the generated correction data corresponds to the insufficient sample number correction data. (Step S55).
　サンプル数不足補正データに該当する場合（ステップＳ５５：Ｙｅｓ）、サーバ１０は図１２に例示するように、補正データＤＢ１４にそのときの携帯端末２０の端末ＩＤを記憶する（ステップＳ５６）。一方、サンプル数不足補正データに該当しない場合（ステップＳ５５：Ｎｏ）、ステップＳ５６の処理は行われない。そして、サーバ１０は、生成した補正データを携帯端末２０へ送信する（ステップＳ５７）。 If the sample number deficiency correction data is satisfied (step S55: Yes), the server 10 stores the terminal ID of the portable terminal 20 at that time in the correction data DB 14 as illustrated in FIG. 12 (step S56). On the other hand, when the sample number deficiency correction data is not applicable (step S55: No), the process of step S56 is not performed. Then, the server 10 transmits the generated correction data to the mobile terminal 20 (step S57).
　携帯端末２０は、補正データを受信すると、車両７内の車載器３０へ転送する（ステップＳ５８）。これにより、車載器３０には、サーバ１０から送信された補正データが設定される。よって、サーバ１０からサンプル数不足補正データが送信された場合には、その補正データが車載器３０に設定されるので、車室内の音場補正の精度は必ずしも十分ではない状態となる。 When receiving the correction data, the portable terminal 20 transfers the correction data to the vehicle-mounted device 30 in the vehicle 7 (step S58). Thereby, the correction data transmitted from the server 10 is set in the vehicle-mounted device 30. Therefore, when the sample number shortage correction data is transmitted from the server 10, the correction data is set in the vehicle-mounted device 30, so that the accuracy of the sound field correction in the passenger compartment is not necessarily sufficient.
　しかし、その後にサーバ１０において同一車種の測定データのサンプル数が増加して十分なサンプル数に達した場合、サーバ１０は高精度の補正データを生成し、補正データＤＢ１４を参照して過去にサンプル数不足補正データを送信した携帯端末２０へ高精度の補正データを送信する。よって、携帯端末２０は、その高精度の補正データを受信し、車載器３０に転送して設定することにより、高精度の音場補正が可能となる。 However, when the number of samples of the measurement data of the same vehicle type increases in the server 10 after that and reaches a sufficient number of samples, the server 10 generates highly accurate correction data and refers to the correction data DB 14 in the past. High-precision correction data is transmitted to the portable terminal 20 that has transmitted the shortage correction data. Therefore, the portable terminal 20 receives the high-accuracy correction data, transfers it to the vehicle-mounted device 30, and sets it, thereby enabling high-accuracy sound field correction.
　なお、サーバ１０は、ステップＳ５７でサンプル数不足補正データを携帯端末２０へ送信する際には、その旨のメッセージなどを送信して携帯端末２０のユーザに通知してもよい。例えば、「今回送信する補正データはサンプル数が不十分な状態で生成されたものです。後日サンプル数が十分な数になった際には、より高精度の補正データをお送りします。」などのメッセージを送信してもよい。これにより、ユーザは最初に送信された補正データによる音場補正が多少満足できないものであったとしても、高精度の補正データを待つことができる。 In addition, when transmitting the sample number deficiency correction data to the mobile terminal 20 in step S57, the server 10 may notify the user of the mobile terminal 20 by transmitting a message to that effect. For example, “The correction data to be sent this time was generated with an insufficient number of samples. When the number of samples becomes sufficient later, we will send more accurate correction data.” May be sent. This allows the user to wait for highly accurate correction data even if the sound field correction by the correction data transmitted first is somewhat unsatisfactory.
　本発明は、車室内で音楽を再生するシステムに利用することができる。 The present invention can be used in a system for playing music in a passenger compartment.
　５　ネットワーク
　１０　サーバ
　１２　制御部
　１４　補正データＤＢ
　２０　端末装置
　２２　制御部
　２５　マイク
　３０　車載器
　３５　スピーカ 5 Network 10 Server 12 Control unit 14 Correction data DB
20 Terminal device 22 Control unit 25 Microphone 30 On-vehicle device 35 Speaker

Claims (7)

  1. 　アップロードされた車種別の音場測定データを複数個用いて車種別音場補正データを生成するサーバと通信可能な携帯端末であって、
    　第１の車両の音場を測定して第１の音場測定データを生成する測定手段と、
    　前記測定の対象となった車両の車種情報を取得する取得手段と、
    　前記第１の音場測定データと前記車種情報とを前記サーバに送信する送信手段と、
    　前記第１の音場測定データと、前記第１の車両とは異なる車両であり、かつ前記車種である第２の車両の音場を測定して生成された第２の音場測定データと、に基づき生成された前記車種情報に対応する車種別音場補正データを、前記サーバから受信する受信手段と、
    　を備えることを特徴とする携帯端末。     A portable terminal capable of communicating with a server that generates vehicle type sound field correction data using a plurality of uploaded vehicle type sound field measurement data,
    Measuring means for measuring the sound field of the first vehicle and generating first sound field measurement data;
    Acquisition means for acquiring vehicle type information of the vehicle that is the object of measurement;
    Transmitting means for transmitting the first sound field measurement data and the vehicle type information to the server;
    The first sound field measurement data and second sound field measurement data generated by measuring a sound field of a second vehicle which is a vehicle different from the first vehicle and is the vehicle type; Receiving means for receiving, from the server, vehicle type sound field correction data corresponding to the vehicle type information generated based on
    A portable terminal comprising:
  2. 　前記測定手段は、
    　前記車両に取り付けられた車載器にテスト信号を出力する出力手段と、
    　前記車載器が前記テスト信号を再生することにより前記車両の車室に出力されたテスト音を収音して前記音場測定データを生成する収音手段と、
    　を備えることを特徴とする請求項１に記載の携帯端末。     The measuring means includes
    Output means for outputting a test signal to the vehicle-mounted device attached to the vehicle;
    Sound collection means for collecting the test sound output to the vehicle cabin by reproducing the test signal by the vehicle-mounted device and generating the sound field measurement data;
    The mobile terminal according to claim 1, further comprising:
  3. 　前記車種別音場補正データを、前記第１の車両に搭載された再生装置へ送信する送信手段を有することを特徴とする請求項１又は２に記載の携帯端末。 The portable terminal according to claim 1 or 2, further comprising a transmission unit configured to transmit the vehicle-specific sound field correction data to a playback device mounted on the first vehicle.
  4. 　アップロードされた車種別の音場測定データを複数個用いて車種別音場補正データを生成するサーバと通信可能な携帯端末によって実行される音場測定データ提供方法であって、
    　第１の車両の音場を測定して第１の音場測定データを生成する測定工程と、
    　前記測定の対象となった車両の車種情報を取得する取得工程と、
    　前記第１の音場測定データと前記車種情報とを前記サーバに送信する送信工程と、
    　前記第１の音場測定データと、前記第１の車両とは異なる車両であり、かつ前記車種である第２の車両の音場を測定して生成された第２の音場測定データと、に基づき生成された前記車種情報に対応する車種別音場補正データを、前記サーバから受信する受信工程と、
    　を備えることを特徴とする音場測定データ提供方法。     A sound field measurement data providing method executed by a portable terminal capable of communicating with a server that generates vehicle type sound field correction data using a plurality of uploaded vehicle type sound field measurement data,
    A measurement step of measuring the sound field of the first vehicle and generating first sound field measurement data;
    An acquisition step of acquiring vehicle type information of the vehicle that is the object of the measurement;
    A transmission step of transmitting the first sound field measurement data and the vehicle type information to the server;
    The first sound field measurement data and second sound field measurement data generated by measuring a sound field of a second vehicle which is a vehicle different from the first vehicle and is the vehicle type; Receiving the vehicle type sound field correction data corresponding to the vehicle type information generated on the basis of the server,
    A method for providing sound field measurement data, comprising:
  5. 　コンピュータを有し、アップロードされた車種別の音場測定データを複数個用いて車種別音場補正データを生成するサーバと通信可能な携帯端末によって実行されるプログラムであって、
    　第１の車両の音場を測定して第１の音場測定データを生成する測定手段、
    　前記測定の対象となった車両の車種情報を取得する取得手段、
    　前記第１の音場測定データと前記車種情報とを前記サーバに送信する送信手段、
    　前記第１の音場測定データと、前記第１の車両とは異なる車両であり、かつ前記車種である第２の車両の音場を測定して生成された第２の音場測定データと、に基づき生成された前記車種情報に対応する車種別音場補正データを、前記サーバから受信する受信手段、
    　として前記携帯端末を機能させることを特徴とするプログラム。     A program executed by a portable terminal having a computer and capable of communicating with a server that generates vehicle-specific sound field correction data using a plurality of vehicle-specific sound field measurement data uploaded,
    Measuring means for measuring the sound field of the first vehicle and generating first sound field measurement data;
    Acquisition means for acquiring vehicle type information of the vehicle that is the object of the measurement;
    Transmitting means for transmitting the first sound field measurement data and the vehicle type information to the server;
    The first sound field measurement data and second sound field measurement data generated by measuring a sound field of a second vehicle which is a vehicle different from the first vehicle and is the vehicle type; Receiving means for receiving, from the server, vehicle type sound field correction data corresponding to the vehicle type information generated based on
    A program for causing the portable terminal to function as:
  6. 　請求項５に記載のプログラムを記憶したことを特徴とする記憶媒体。 A storage medium storing the program according to claim 5.
  7. 　携帯端末と通信可能なサーバであって、
    　複数の携帯端末から、車両の車種情報と当該車両の音場を測定して得られたデータである音場測定データをと受信する受信手段と、
    　前記車種情報に基づき、前記音場測定データを車種別に分類する分類手段と、
    　前記車種別に分類された複数の音場測定データに基づき、前記車種情報に対応する車種別補正データを生成する生成手段と、
    　前記車種別補正データを当該車種情報を送信した携帯端末に対して送信する送信手段と、を有することを特徴とするサーバ。     A server that can communicate with a mobile terminal,
    Receiving means for receiving the vehicle type information of the vehicle and the sound field measurement data, which is data obtained by measuring the sound field of the vehicle, from a plurality of portable terminals;
    Classification means for classifying the sound field measurement data into vehicle types based on the vehicle type information;
    Generating means for generating vehicle type correction data corresponding to the vehicle type information based on a plurality of sound field measurement data classified into the vehicle type;
    A transmission unit configured to transmit the vehicle type correction data to the mobile terminal that has transmitted the vehicle type information.
PCT/JP2015/060008 2015-03-30 2015-03-30 Mobile terminal, server, method for providing sound field data, and program WO2016157388A1 (en)

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