JP2006270474A - Handsfree telephone communication equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide handsfree telephone communication equipment which enables the telephone communication of sound quality with less echoes and noise. <P>SOLUTION: The handsfree telephone communication equipment 10 for performing handsfree telephone communication with the telephone device of an opposite party by utilizing communication equipment 30 comprises: a means for receiving voice data from the telephone device of the opposite part through the communication equipment 30; a means for outputting the received voice data from the telephone device of the communicating party to a speaker 300; a means for receiving the input of the voice data gathered by a microphone 400; a voice data processing part 100 for executing prescribed processing to the voice data received by an echo canceller 101 and a noise canceller 102 and outputting them; a means for transmitting the voice data outputted by the voice data processing part 100 to the telephone device of the opposite party; and a control part 130 for changing the setting of the echo canceller and the noise canceller. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technique for reducing echo and noise generated during communication, and more particularly to a technique of a hands-free call device for making a call without holding a communication terminal.

  2. Description of the Related Art In recent years, in-vehicle hands-free call devices for making a call without holding a mobile phone in a car have become widespread. An in-vehicle hands-free call device collects a user's voice with a microphone and transmits the collected voice to a communication partner's telephone via a mobile phone. The voice from the communication partner received by the mobile phone is output from the speaker.

  In the above-described hands-free call device, the microphone sometimes picks up the received voice from the speaker. As a result, an echo may occur and hinder the call. In addition, it has been pointed out that when a call is made during traveling, noise is generated in the voice due to noise caused by traveling of the vehicle.

  2. Description of the Related Art Conventionally, a hands-free communication device of a type having an echo canceller that cancels generated echoes is known (for example, Patent Document 1).

JP 9-289474 A

  However, Patent Document 1 has the following problems. Specifically, in Patent Document 1, the amount of echo to be canceled is obtained using a preset parameter. Moreover, the apparatus of patent document 1 cannot change the parameter freely preset by the user. In the apparatus of Patent Document 1, even if the echo is canceled with the value obtained by the set parameter, the echo may remain. As a result, in Patent Document 1, there is a case where a call with sound quality that the user can satisfy cannot be realized.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hands-free call device that realizes a call with a sound quality with less echo and noise.

  In order to solve the above-described problem, one embodiment of the present invention is applied to a hands-free communication device that is connected to a telephone device and performs a hands-free call with a destination telephone device using the telephone device. Here, the hands-free communication device is provided with a microphone and a speaker.

  The hands-free call device receives means for receiving voice data from the other party's telephone device via the telephone device, and means for outputting the received voice data from the other party's phone device to the speaker Means for receiving input of voice data collected by the microphone, voice data processing means for performing predetermined data processing on the received voice data, and outputting the voice data via the telephone device Means for transmitting the voice data output from the processing means to the other party's telephone device, and the predetermined data processing performed by the voice data processing means includes the received voice data from the other party's telephone device. Generating a pseudo echo using a preset echo parameter and generating the pseudo echo from the received voice data Using the echo cancellation processing to be subtracted, the received user's voice data, and a noise parameter for detecting preset noise, the noise contained in the voice data is detected, and the voice data is The noise canceling process for removing the detected noise further includes control means for changing the preset echo parameter and a preset value of the preset noise parameter.

  As described above, according to the present invention, the hands-free communication device is provided with the control means for changing the setting of the echo parameter used for the echo cancellation process and the noise parameter used for the noise cancellation process. That is, according to the present invention, the echo parameter and the noise parameter can be changed according to the call state. Therefore, in hands-free calling, it is possible to realize a call with sound quality with less echo and noise.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
First, a schematic configuration of an in-vehicle system to which the first embodiment of the present invention is applied will be described with reference to FIG.

  FIG. 1 is a schematic configuration diagram of an in-vehicle system to which the first embodiment of the present invention is applied.

  As shown in the figure, the in-vehicle system is connected to the hands-free call device 10, the navigation system 20 that controls the operation of the hands-free call device 10, and the hands-free call device 10, and communicates with other communication terminals. And a communication device 30 that performs the above. The present embodiment exemplifies a case where a portable wireless telephone terminal (mobile phone) is used for the communication device 30. The in-vehicle system realizes that the user makes a call with another communication terminal without having the communication device 30 by hand.

  Specifically, the hands-free call device 10 includes a voice data processing unit 100, a D / A converter 110, an A / D converter 120, a control unit 130, a codec 140, a speaker 300, and a microphone 400.

  The microphone 400 collects user voice data (transmitted voice). The A / D converter 120 converts analog audio data collected by the microphone 400 into digital audio data and outputs the digital audio data to the audio data processing unit 100. The voice data processing unit 100 includes an echo canceller 100 and a noise canceller 102, performs echo cancellation processing and noise cancellation processing on the user's voice data (transmitted voice), and outputs the result to the codec 140. Note that the audio data processing unit 100 is realized by a dedicated circuit provided with an echo canceller 101 and a noise canceller 102.

  The codec 140 converts the digital voice data (transmitted voice) received from the voice data processing unit 100 into analog voice data, and transmits the analog voice data to the communication terminal of the other party via the communication device 30. The codec 140 accepts input of voice data (received voice) received from the communication terminal of the other party received by the communication apparatus 30, converts the received analog voice data into digital voice data, and the voice data processing unit 100. Output to. The audio data processing unit 100 outputs the audio data received from the codec 140 from the other communication terminal to the echo canceller 101 and the D / A converter 110. The D / A converter 110 converts digital audio data output from the audio data processing unit 100 into analog audio data and outputs the analog audio data to the speaker 300. The speaker 300 outputs the voice data (received voice) received from the D / A converter 110 as voice.

  Here, the configurations of the echo canceller 101 and the noise canceller 102 will be described. The echo canceller 101 is provided with a parameter holding unit 103 for setting parameters (echo parameters) used for echo cancellation processing. The echo canceller 101 generates a pseudo echo using voice data (received voice) from a communication terminal (telephone) of a communication partner output by the codec 140 and echo parameters set in the parameter holding unit 103. . The echo canceller 101 then collects the sound collected by the microphone 400 input from the A / D converter 120 (user's voice data (speech voice), voice data from the communication partner output from the speaker, noise, and the like. Etc.) is subtracted from the generated pseudo echo. The generation of the pseudo echo is assumed to be realized by the prior art.

  The noise canceller 102 is provided with a parameter holding unit 104 for setting parameters (noise parameters) used for noise cancellation processing. The noise canceller 102 receives audio data output from the echo canceller 103. The noise canceller 102 detects the noise included in the received audio data using the received audio data and the noise parameter set in the parameter holding unit 104, and removes the detected noise from the audio data. . The audio data processing unit 100 according to the present embodiment performs echo cancellation processing and then performs noise cancellation processing. However, the present invention is not particularly limited to this. The noise cancellation process may be performed first, and then the echo cancellation process may be performed. When the noise canceling process is performed first, the noise canceller 102 cancels noise with respect to the sound collected by the microphone 400 (user voice data, voice data from the communication partner output from the speaker, noise, etc.). Apply processing.

  Next, functions of the control unit 130 will be described. The control unit 130 controls the operation of the entire hands-free call device 10. Specifically, the control unit 130 displays a reception screen for receiving various requests from the user on the display device 202 of the navigation system 20 to be described later, and receives various requests from the user via the input device 201. Accept. For example, when the request from the user is an instruction to make a call to the communication terminal of the other party, a line connection is made with the designated communication terminal of the other party via the communication device 30.

  Further, the control unit 130 receives “data indicating that the noise is large” or “data indicating that the echo is large” via the input device 201. Then, the control unit 130 transmits the received “data indicating that the noise is large” or “data indicating that the echo is large” to the other communication terminal via the communication device 30.

  Further, the control unit 130 receives “data indicating that the noise is large” or “data indicating that the echo is large” transmitted from the communication terminal of the other party via the communication device 30. When the control unit 130 receives “data indicating that the noise is large” from the communication terminal of the other party, the control unit 130 changes the setting value of the noise parameter set in the noise canceller 102. In addition, when receiving “data indicating that the echo is large” from the communication terminal of the other party, the control unit 130 changes the setting value of the echo parameter set in the echo canceller 101.

  The control unit 130 transmits and receives data between a CPU (Central Processing Unit), a memory that stores programs executed by the CPU and various data, and external devices such as the communication device 30 and the navigation system 20. And an I / O interface for controlling the. And the function which the control part 130 performs is implement | achieved when CPU runs the program memorize | stored in memory.

  Next, the navigation system 20 will be described. The navigation system 20 obtains the current position of the vehicle, generates a screen on which a mark indicating the current position is superimposed on a map and displays the screen on the display device 202, searches for a route to the destination, Processing such as guiding to the ground. Specifically, the navigation system 20 includes a navigation device body 200, an input device 201 that accepts various requests from a user, and a display device 202 that displays image data. As the display device 202, for example, a liquid crystal display can be used. The input device 201 is configured by a hard switch such as a scroll key or a scale change key, a joystick, a touch panel provided on the display device 202, and the like.

  The navigation device main body 200 includes an arithmetic processing unit having a CPU and a memory, a storage device in which map data and the like are stored, various sensors (for example, a wheel speed sensor, a geomagnetic sensor, and a gyro), and GPS (Global Positioning System) reception. Device. Then, the arithmetic processing unit detects the current position based on information output from various sensors and a GPS receiver. The arithmetic processing unit reads map data around the detected current position from the storage device, and displays a screen in which a mark indicating the current position is superimposed on the read map data on the display device 202. In addition, the arithmetic processing unit searches for a recommended route to the destination and guides the user to reach the destination.

  Further, the navigation device body 200 controls the operation of the hands-free call device 10. When the navigation apparatus main body 200 receives an instruction to make a call from the user, the navigation apparatus main body 200 controls the hands-free call device 10 to establish a line connection with the communication terminal of the other party designated by the user via the communication device 30. . When communication device 30 starts communication with an external communication terminal, hands-free call device 10 requests navigation device body 200 to display an acceptance screen. When the navigation apparatus body 200 receives a request to display the above reception screen, the navigation apparatus body 200 displays a reception screen (for example, the screen shown in FIG. 3) on the display device 202.

  Then, according to the reception screen displayed on the display device 202 by the user, various data (in the example of FIG. 3, “data indicating that the noise is large” or “data indicating that the echo is large”). Is input via the input device 201. In this case, the navigation device body 200 receives various data input via the input device 201 and outputs the received data to the hands-free call device 10.

  Next, processing for changing the settings of the echo canceller 101 and the noise canceller 102 performed by the in-vehicle system according to the first embodiment will be described with reference to FIGS. 2 and 3.

  FIG. 2 is a diagram for explaining processing for changing the settings of the echo canceller 101 and the noise canceller 102 performed by the in-vehicle system according to the first embodiment. FIG. 3 is a diagram illustrating a reception screen displayed by the in-vehicle system according to the first embodiment. In FIG. 2, the above-described in-vehicle system having the configuration of FIG. 1 is mounted in each of the A car and the B car. The in-vehicle system mounted in the A car and the in-vehicle system mounted in the B car. As an example, the communication is performed between and.

  First, when communication is established between the in-vehicle system communication device 30 installed in the A car and the in-vehicle system communication device 30 installed in the B car, the in-vehicle system installed in the A car. Displays the reception screen 1000 illustrated in FIG. 3 on the display device 202 (S100). Similarly, when communication is established between the in-vehicle system communication device 30 installed in the A car and the in-vehicle system communication device 30 installed in the B car, the in-vehicle system installed in the B car. The system displays the reception screen 1000 illustrated in FIG. 3 on the display device 202 (S200).

  As shown in the figure, the reception screen 1000 receives an input of an echo switch (echo SW) 1100 for receiving “data indicating that the generated echo is large” and “data indicating that noise is large”. A noise switch (noise SW) 1200 is provided. When the user feels that the echo is large during a call, the user selects the echo SW 1100 via the input device 201. Further, when the user feels that the noise is large during the call, the user selects the noise SW 1200 via the input device 201. For example, when joystick is used for the input device 201, a cursor is displayed on the reception screen 1000, and the selection of the echo SW 1100 (or noise SW 1200) is accepted by the cursor. The navigation apparatus main body 200 receives an input of “data indicating that the echo (or noise) is large” from the user by selecting the echo SW 1100 (or the noise SW 1200). In the following, an example will be described in which an echo (or noise) generated by the user of the B car is felt to be large and the echo SW 1100 (or noise SW) is selected via the input device 201.

  Specifically, the navigation apparatus main body 200 of the in-vehicle system on which the vehicle B is mounted receives an input of “data indicating that echo (or noise) is large” from the user via the input device 201 ( S210). When the navigation apparatus body 200 receives an input of “data indicating that echo (noise) is large” from the user, the navigation apparatus body 200 outputs the data to the control unit 130 of the hands-free call device 10.

  When the control unit 130 of the hands-free communication device 10 mounted on the B vehicle receives “data indicating that the echo (or noise) is large”, the control unit 130 generates a control signal indicating the fact and transmits the control signal via the communication device 30. Then, the data is transmitted to the communication device 30 mounted on the A car (S220). The specific configuration of the control signal is not particularly limited. For example, a DTMF (Dial Tone Multi Frequency) signal that can be transmitted from a mobile phone may be used as the control signal.

  The communication device 30 mounted on the A vehicle receives a control signal indicating that “the echo (or noise) is large” from the communication device 30 mounted on the B vehicle, and uses the received control signal as a hands-free communication device. To 10 control units 130. Then, the control unit 130 of the hands-free communication device 10 mounted on the A vehicle changes the setting of the echo canceller 101 when the control signal from the communication device 30 is “a signal indicating that the echo is large” (S120). Specifically, the control unit 130 changes the set value of the echo parameter set in the parameter holding unit 103 so that the amount of pseudo echo canceled by the echo canceller 101 is increased. When the control signal from the communication device 30 is “a signal indicating that the noise is large”, the setting of the noise canceller 102 is changed. Specifically, the control unit 130 changes the setting value of the noise parameter set in the parameter holding unit 104 so that the amount of noise canceled by the noise canceller 102 increases.

  Then, after the processing of S120, the hands-free call device 10 mounted on the A car performs echo cancellation processing (noise cancellation processing) on the voice data (sending voice) using the changed echo parameter (noise parameter). The voice data is transmitted to the communication device 30 of the B car via the communication device 30.

As described above, according to the hands-free call device 10 of the present embodiment, when the user is concerned about echo (noise) during a call, the user can use the displayed reception screen (see FIG. 3). By performing the process of selecting the echo SW 1100 (noise SW 1200), it is possible to change the setting of the echo canceller 101 (noise canceller 102) of the other party who is talking. That is, according to the present embodiment, a configuration is adopted in which settings of the echo canceller and noise canceller at the other end can be changed even when echo or noise remains in the voice data processed by the other party's system. Therefore, according to the hands-free call device 10 of the present embodiment, it is possible to realize a call with a sound quality with less echo and noise.
<Second Embodiment>
Next, a second embodiment of the present invention will be described. In the second embodiment, the function of the hands-free call device 10 of the first embodiment is partially changed. In the second embodiment, the hands-free communication device 10 is provided with a function of accepting a setting change of the echo canceller 101 and the noise canceller 102 according to a request from the user. Specifically, in the second embodiment, the settings of the echo canceller and noise canceller of the hands-free call device 10 used by the user can be changed by the user's operation (the first embodiment is , Configured to change the settings of the echo canceller and noise canceller of the destination system).

  Therefore, when the user of the in-vehicle system according to the second embodiment hears “the echo (or noise) is large” from the other party, the user can change the setting of the echo canceller (or noise canceller) himself. The reason for this configuration is that there is a case where the communication device of the other party on the call may not be provided with a function of transmitting a control signal indicating that “echo (or noise) is large”. Furthermore, the hands-free call device 10 of the second embodiment can adjust the volume of audio data transmitted to the other party upon request from the user.

  In the description of the second embodiment, the same reference numerals are used for the same configurations as in the first embodiment (the same reference numerals are used except that the control unit is set to “130b”). Further, the description of the second embodiment will be made with a focus on differences from the first embodiment.

  First, the configuration of the in-vehicle system according to the second embodiment will be described. The configuration of the in-vehicle system of the second embodiment is the same as that described in FIG. 1 except that some of the functions of the audio data processing unit 100 and the control unit 130 are different. Specifically, in addition to the configuration of the first embodiment, the voice data processing unit 100 of the second embodiment further adjusts the volume of the user's voice data (transmitted voice) output to the communication device 30. A volume adjustment unit (not shown) is included. Then, the volume adjusting unit adjusts the volume of the voice data of the user output to the communication device 30 according to the instruction from the control unit 130b.

  Further, the control unit 130b of the second embodiment changes the settings of the echo canceller 101, the noise canceller 102, and the volume adjustment unit according to data input by the user via the input device 201. Specifically, the control unit 130b displays a reception screen (for example, the screen shown in FIG. 5) that accepts the setting change of the voice data processing unit 100 on the display device 202 via the navigation device body 200. And the control part 130b receives the request | requirement of the setting change of the audio | voice data processing part 100 (Echo canceller 101, the noise canceller 102, and a sound volume adjustment part) which a user inputs according to a reception screen via the input device 201. FIG. The control unit 130b changes the setting of the audio data processing unit 100 in accordance with the received request for setting change.

  Next, a process for changing the setting of the audio data processing unit 100 performed by the in-vehicle system according to the second embodiment will be described with reference to FIGS. 4 and 5.

  FIG. 4 is a diagram for explaining processing for changing the setting of the audio data processing unit 100 performed by the in-vehicle system according to the second embodiment. FIG. 5 is a diagram illustrating a reception screen displayed by the in-vehicle system according to the second embodiment. FIG. 4 shows an example in which the in-vehicle system according to the second embodiment is installed in the A car and communication is performed between the in-vehicle system installed in the A car and the telephone C of the communication partner. I have to. The configuration of the telephone C is not particularly limited. The telephone C only needs to be able to communicate by telephone with the communication device 30 of the in-vehicle system mounted on the A car.

  First, when communication is established between the communication device 30 mounted on the A car and the telephone C, the in-vehicle system mounted on the A car displays the reception screen 2000 illustrated in FIG. Display (S300).

  As shown in the figure, the reception screen 2000 has a volume adjustment lever 2110 for adjusting the volume of the audio data transmitted to the destination telephone C, and an echo cancellation amount applied to the audio data transmitted to the telephone C. Echo adjustment lever 2120 and a noise adjustment lever 2130 for adjusting the amount of noise cancellation applied to the audio data transmitted to the telephone set C are provided. For example, the input device 201 displays a cursor on the reception screen 2000, and accepts movements of the volume adjustment lever 2110, the echo adjustment lever 2120, and the noise adjustment lever 2130 by the cursor.

  Then, the control unit 130b of the hands-free call device 10 receives an instruction for adjusting the volume of the voice data transmitted from the user to the telephone C by the volume adjustment lever 2110 via the input device 201. The control unit 130b accepts an instruction to adjust the amount of echo cancellation to be applied to the voice data transmitted from the user to the telephone C by the echo adjustment lever 2120 via the input device 201. In addition, the control unit 130b accepts an instruction to adjust the amount of noise to be cancelled to the voice data transmitted from the user to the telephone C by the noise adjustment lever 2130 via the input device 201.

  For example, when the control unit 130b receives an operation of lowering the echo lever 2120 via the input device 201 as illustrated in FIG. 5B, the control unit 130b receives an instruction to increase the amount of echo cancellation applied to the audio data. To do. In the following description, an example in which the user of the telephone C feels that the echo of the voice of the telephone call is large, and informs the user of the car using the hands-free call device 10 of the car A by voice. To. Specifically, voice data indicating that “echo (noise) is large” is output from the telephone C to the communication device 30 of the A car (S400).

  The hands-free call device 10 of car A receives voice data indicating that “the echo is large” from the telephone C via the communication device 30, and outputs the received voice data from the speaker 300 (S310).

  The user of the hands-free call device 10 of the A vehicle recognizes that the echo included in the audio data transmitted to the telephone C is large from the audio data output from the speaker 300. Then, the user of the hands-free call device 10 lowers the echo adjustment lever 2120 of the reception screen 2000 via the input device 201. That is, the user makes a request to the hands-free call device 10 to increase the amount of echo cancellation applied to the voice data transmitted to the telephone C. The control unit 130b receives a request to increase the amount of echo cancellation via the input device 201 (S320).

  Then, the control unit 130b changes the setting value of the echo parameter set in the parameter holding unit 103 so that the pseudo echo amount canceled by the echo canceller 101 increases in the same procedure as in S120 of FIG. (S330).

  In the above description, the case where a request for changing the setting of the echo canceller 101 is received from the user is taken as an example, but the setting change of the noise canceller 102 and the volume adjusting unit is also performed by the same procedure.

Thus, in the second embodiment of the present invention, a configuration is adopted in which settings of the echo canceller 101, the noise canceller 102, and the volume adjustment unit are changed by a user operation. Therefore, when the user of the in-vehicle system according to the second embodiment is pointed out that the voice data quality is bad (large echo, noise, etc.) from the other party who is talking, the user himself is in-vehicle. By operating the system, the quality of the call voice can be improved. That is, in the second embodiment, the quality of the call voice can be improved regardless of the function of the terminal of the other party of the call (it is sufficient if communication by telephone is possible).
<Third Embodiment>
Subsequently, a third embodiment of the present invention will be described. In the third embodiment, the function of the control unit 130b of the hands-free call device 10 of the second embodiment is partially changed. In the third embodiment, in addition to the function of changing the setting of the voice data processing unit 100 of the second embodiment described above, the hands-free call device 10 can send a message that “the echo is large” and “the noise is large” to the other party. Audio data indicating that “the volume is high” and “the volume is high”. In the description of the third embodiment, the same reference numerals are used for the same configurations as in the second embodiment (the same reference numerals are used except that the control unit is set to “130c”). Further, the third embodiment will be described with a focus on differences from the second embodiment.

  Specifically, the control unit 130c of the hands-free communication device 10 according to the third embodiment displays the reception screen 3000 illustrated in FIG. 6 on the display device 202 when communication is established with the communication terminal of the other party. indicate.

  The reception screen 3000 is provided with the “volume adjustment lever 2110”, “echo adjustment lever 2120”, and “noise adjustment lever 2130” shown in FIG. Furthermore, on the reception screen 3000, the hands-free call device 10 notifies the communication partner of "voice is large", "noise is large", and "volume is loud". 2230 are provided.

  When the user selects the voice notification buttons 2210, 2220, and 2230 on the reception screen 300, the control unit 130c sets the voice data associated with each of the voice notification buttons 2210, 2220, and 2230 to the communication partner. Send. For example, when the selection of the voice notification button 2210 is accepted, the control unit 130c transmits voice data “indicating that the echo is large” to the communication apparatus of the other party via the communication apparatus 30. Further, for example, when the control unit 130c receives selection of the voice notification button 2220, the control unit 130c transmits voice data “indicating that the noise is large” to the communication apparatus of the other party via the communication apparatus 30.

  Further, when the hands-free communication device 10 of the third embodiment receives voice data indicating that “echo (noise or volume)” from the other party is large via the communication device 30, the second embodiment The settings of the audio data processing unit 100 (echo canceller 101, noise canceller 102, volume adjustment unit) are changed by the operation from the user in the same procedure as described above.

  The present invention is not limited to the embodiment described above, and various modifications can be made within the scope of the gist of the present invention. For example, in the present embodiment, the case where the hands-free call device 10 is connected to the navigation system 20 has been described, but this is merely an example. Even if the hands-free communication device 10 is provided with a dedicated display device and input device, the same effects as in the above embodiment can be obtained.

  In the present embodiment, the codec 140 is provided in the hands-free call device 10 as an example, but the present invention is not particularly limited thereto. When the communication device 30 can communicate with the hands-free communication device 10 using digital audio data, the hands-free communication device 10 does not need to be provided with the codec 140. In that case, the communication device 30 and the audio data processing unit 100 of the hands-free device 10 directly transmit and receive digital audio data.

  In the above embodiment, the case where the hands-free communication device 10 is applied to an in-vehicle system has been described. However, the present invention is not particularly limited thereto. For example, the above-described hands-free call device may be applied to a video conference system.

  In the first embodiment, the case where the reception screen for notifying the other party of “the echo is large” and “the noise is large” is shown as an example. However, the present invention is not particularly limited to this. For example, a function of notifying a communication partner of a control signal indicating that “the volume is high” may be provided. Then, when a control signal indicating “volume is high” is received, the volume of the audio data transmitted from the volume data processing unit 100 to the other party may be automatically lowered.

  In this embodiment, the reception screen is displayed on the display device to accept various requests from the user. However, a dedicated operation switch is provided, and the request from the user is received by the dedicated switch. May be accepted

1 is a schematic configuration diagram of an in-vehicle system to which a first embodiment of the present invention is applied. It is a figure for demonstrating the process which changes the setting of the echo canceller 101 and the noise canceller 102 which the vehicle-mounted system of 1st Embodiment of this invention performs. It is the figure which illustrated the reception screen which the vehicle-mounted system of 1st Embodiment of this invention displays. It is a figure for demonstrating the process which changes the setting of the audio | voice data processing part 100 which the vehicle-mounted system of 2nd Embodiment of this invention performs. It is the figure which illustrated the reception screen which the vehicle-mounted system of 2nd Embodiment of this invention displays. It is the figure which illustrated the reception screen which the vehicle-mounted system of 3rd Embodiment of this invention displays.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Hands free call apparatus, 20 ... Navigation system, 30 ... Call apparatus, 100 ... Voice data processing part, 101 ... Echo canceller, 102 ... Noise canceller, 103 ... Parameter holding part, 104 ... Parameter holding part, 110 ... D / A Converter, 120 ... A / D converter, 130 ... Control unit, 140 ... Codec, 200 ... Navigation device body, 201 ... Input device, 202 ... Display device, 300 ... Speaker, 400 ... Microphone

Claims (7)

A hands-free call device that is connected to a telephone device and makes a hands-free call with a destination phone device using the telephone device,
The hands-free call device is provided with a microphone and a speaker,
Means for receiving voice data from the other party's telephone device via the telephone device;
Means for outputting the received voice data from the destination telephone device to the speaker;
Means for receiving input of voice data collected by the microphone;
Audio data processing means for performing predetermined data processing on the received audio data and outputting;
Via the telephone device, means for transmitting the voice data output by the voice data processing means to the destination telephone device,
The predetermined data processing performed by the voice data processing means is the generation of pseudo echo using the received voice data from the destination telephone device and a preset echo parameter for generating a pseudo echo. And using the echo cancellation process for subtracting the pseudo echo from the received voice data, the received user voice data, and a noise parameter for detecting preset noise, the voice data Is a noise canceling process for detecting noise contained in the audio data and removing the detected noise from the audio data,
A hands-free communication device comprising: control means for changing set values of the preset echo parameter and the preset noise parameter. The hands-free call device according to claim 1,
Means for receiving, via the telephone device, data indicating that the echo from the destination telephone device is large, and data indicating that the noise is large;
The control means includes
When receiving data indicating that the echo is large, change the setting value of the echo parameter,
A hands-free call device that changes a setting value of the noise parameter when data indicating that the noise is large is received. The hands-free call device according to claim 1,
The echo parameter change request from the user, and input means for receiving the noise parameter change request from the user,
The control means includes
When the input means accepts the echo parameter change request, the setting value of the echo parameter is changed,
A hands-free call device that changes a set value of the noise parameter when the input means receives a request to change the noise parameter. The hands-free call device according to claim 3,
Display means for displaying image data;
Means for displaying on the display means a reception screen for receiving a change in the setting of the echo parameter and the noise parameter;
The input means includes
A hands-free call device that receives the echo parameter change request and the noise parameter change request input by a user according to the reception screen. The hands-free call device according to claim 3,
Display means for displaying image data;
Means for displaying on the display means a reception screen including an operation area for receiving data indicating that the echo being generated is large and an operation area for receiving data indicating that the noise is large;
Means for receiving data indicating that the echo input by the user according to the reception screen is large, or data indicating that the noise is large;
When the data indicating that the echo is large is received, the data indicating that the echo is large is transmitted to the destination telephone device, and when the data indicating that the noise is large is received, the data is transmitted to the destination telephone device. And a means for transmitting data indicating that the noise is large. The hands-free call device according to claim 5,
The hands-free communication device characterized in that the data indicating that the echo transmitted to the destination telephone device is large and the data indicating that the noise is large are DTMF (Dial Tone Multi Frequency) signals. The hands-free call device according to claim 5,
A hands-free call device characterized in that the data indicating that the echo transmitted to the destination telephone device is large and the data indicating that the noise is large are voice signals.

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