JP2006301276A - Portable music reproducing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a music reproduction device capable of choosing a piece of music, in correspondence with a walking step which changes dynamically. <P>SOLUTION: The portable music reproducing device A comprises a search part 1 for searching a piece of music by matching rhythm information for search obtained by walking pace analysis and rhythm information of a piece of music in a music DB (1a); a music database 3 for storing pieces of music to be searched; a list of pieces of music 5 for listing a plurality of pieces of music of the rhythm close to the inputted rhythm (5a); a music reproducing part 7 for choosing a piece of music from the list and reproducing it (7a); a walking step detecting part 15 for detecting a walking step (15a); and a walking step analysis part 13 for analyzing an inputted walking step and extracting the rhythm to be searched (13a). Rhythm information 11 for search from the walking step analysis part 13 is inputted to the search part 1. Rhythm information 3a-4 for search of music data 3a is obtained by conducting music analysis 8 of the music database 3. The music data 3a comprise a music name 3a-1, name of the artist 3a-2, name of an album 3a-3, and rhythm information 3a-4 for search. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a portable music player, and more particularly to an apparatus for selecting and playing music related to walking.

  In recent years, portable music playback devices have become popular, and various convenient functions have been added. For example, the auxiliary exercise device described in Patent Document 1 calculates a walking pitch based on the physical information of the athlete and the characteristic information of the walking course, displays a list of music data that substantially matches the walking pitch, and sets the tempo. An apparatus for playing music by changing the tempo to match the calculated walking pitch is disclosed. In the musical sound generating apparatus and method described in Patent Document 2, a walking step is detected, and performance data is reproduced at a tempo corresponding to the walking step. The musical sound generating device described in Patent Literature 3 searches music data based on an input rhythm from a large number of music data recorded on a large-capacity recording medium.

JP 2004-113552 A JP 2004-240252 A International Publication WO2002 / 047066

  However, the auxiliary exercise device described in Patent Document 1 cannot select music corresponding to a dynamically changing walking step. Further, the musical sound generating device described in Patent Document 2 cannot cope with operations such as walking step change and stop during walking. In addition, since the music is played at a tempo corresponding to the walking step, the atmosphere of the music greatly changes depending on the walking step. That is, there is a problem that the dynamically changing input is not considered. The apparatus described in Patent Document 3 searches music data based on an input rhythm, and does not intend to select music corresponding to a dynamically changing walking step.

  That is, 1) The target walking pitch is calculated based on the input data, and the music that matches the actual walking pitch is not always selected. You must enter data. 2) Means for correcting the music in accordance with the detected walking step. Search from a plurality of songs is not performed, and the songs change according to the pace. 3) Does not correspond to dynamically changing walking steps. There are problems such as.

  An object of this invention is to provide the music reproduction apparatus which selects music corresponding to the walk step which changes dynamically.

  A portable music player according to the present invention includes a tempo detecting means for detecting a tempo by detecting a vibration related to walking transmitted to the apparatus body as a tempo, a tempo extracting means for extracting a tempo according to the detected vibration, and a tempo. And a means for selecting and playing a song suitable for the tempo from among a plurality of song data. For example, a vibration transmitted to the apparatus main body is detected, and a plurality of songs matching the tempo of the vibration are searched from the music DB to create a playlist and play it. Search again if the vibration rhythm changes. Note that extracting the tempo corresponding to the detected vibration means obtaining a tempo approximate to the walking step as described with reference to FIGS.

  Since the portable music player according to the present invention automatically selects music having a tempo corresponding to the user's walking tempo, it can walk music suitable for the mood reflected in the tempo related to walking. . In other words, music is linked to actual actions / situations so that music can be enjoyed happily. In addition, it is possible to reproduce the music suitable for the use scene without requiring any user operation, that is, without taking time and effort. By adding vibration of the desired tempo, there is an advantage that the music can be easily selected without any manual operation.

  In this specification, the music suitable for the extracted tempo means a music having the same or approximate tempo as the tempo of the walking step. Basically, one step of the walking step is set to one tempo, but one step of the walking step may be set to n tempo or 1 / n tempo (n is a positive integer).

  Hereinafter, a portable music player according to an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are functional block diagrams showing a configuration example of a portable music player according to the present embodiment. As shown in FIG. 1, the portable music player A according to the present embodiment is, for example, attached to a user's waist or legs or put in a jacket or trouser pocket. Then, the portable music playback device A includes a search unit 1 that performs search (1a) of music by matching rhythm information for search obtained by pace analysis and rhythm information of music in the music DB, and a search target. A music database 3 for storing the music, a plurality of music with a rhythm close to the input rhythm (5a), a music list 5, a music from the list to be played back (7a), a music playback unit 7, and a walking step It has a walking step detector 15 for sensing (15a) and a walking step analyzer 13 for analyzing the input walking step and extracting a rhythm to be searched (13a). The search rhythm information 11 from the walking step analysis unit 13 is input to the search unit 1. The search rhythm information 3a-4 of the music data 3a is obtained as a result of music analysis 8 of the music database 3. The music data 3a includes a music name 3a-1, an artist name 3a-2, an album name 3a-3, and search rhythm information 3a-4. The search rhythm information may be stored in the DB in advance, or the rhythm information may be extracted from the DB. When the list reproduction is not performed, the music list 5 may be omitted, and the music searched by the search unit 1 is reproduced as it is by the music reproduction unit 7.

  FIG. 2 is a diagram showing an example of the overall configuration of the portable music player according to the present embodiment. As shown in FIG. 2, the portable music player according to the present embodiment includes a control unit 21 that controls the entire apparatus, a storage unit 22 that stores music data and search rhythm data, and playback that plays back music. An operation unit 23 such as a button, a detection device 24 that senses a walking step, a display unit 25 that displays music information, an audio output unit 26 that outputs music, and past walking step information are stored, a control program, etc. And a memory 27 for storing search rhythm data and storing search results (music list). The storage unit 22 performs music search / list extraction with the control unit 21, performs music analysis, extracts search rhythm data, and stores them. The detection device 24 performs walking step analysis and extraction of a search rhythm.

  Next, an analysis method based on the walking step will be described. 3, 4, and 5, the horizontal axis is time, and the vertical axis is tempo.

  As shown in FIG. 3, when the pause state related to the tempo continues for a certain time (threshold) or more, it is regarded as a stop and the music list is updated. As shown in FIG. 4, when the interval between walking steps exceeds a preset upper limit value and falls below a lower limit value, it is considered that the user is not walking. In this case, the search input tempo data is determined based on only a portion that is regarded as a pause and is not regarded as a pause.

  FIG. 5 is a diagram illustrating an example of a change in walking tempo during walking, the number of steps, time, and the magnitude relationship between the steps. As shown in FIG. 5, the tempos A_1, A_2, and A_3 represent walking times of predetermined times T_1, T_2, T_3, and the number of steps P_1, P_2, P_3, respectively. An example of determining the search input tempo data will be described with reference to FIG.

  An example of determining search input tempo data based on the number of steps will be described. In this case, the tempo having the largest number of steps in the past fixed period is set as the search input tempo data. In the example of FIG. 5, since P_1 is the maximum tempo, the song with the tempo A_1 is selected. In this way, a pedestrian can select a tempo without any special operation and select a song that matches the pace.

  Next, an example of determining the search input tempo data according to time will be described. In this case, the longest walking tempo in the past fixed period is set as the search input tempo data. In the example of FIG. 5, since T_3 is the largest, the song of tempo A_3 is selected.

It is also possible to determine the search input tempo data based on the average tempo of a certain past period. The average tempo in the past fixed period is calculated by the number of steps and time in the past fixed period. Between tempo A, number of steps P, time T, for example,
P = AT
In this case, the average tempo is (P_1 + P_2 + P_3) / (T_1 + T_2 + T_3).

  It should be noted that weighting can be applied to the method for determining the search input tempo data. An example of this case will be described with reference to FIG. The example shown in FIG. 6 is a diagram showing an example in which weighting processing is added to the method for determining search input tempo data based on the number of steps.

In the upper part of FIG. 6, the horizontal axis represents time and the vertical axis represents tempo, and the black dots on the horizontal axis represent walking steps. In the lower part of FIG. 6, the horizontal axis represents time, the vertical axis represents weight, and the black dots represent the step timing of the walking step. For example, in FIG. 6, the value obtained by adding the weight W ′ at that time to a certain walking step p_3 ′ is
p_3 '× w'
It becomes.

  This value is calculated for each walking step at each tempo, and the tempo having the maximum sum is determined as the search input tempo data. This makes it possible to determine search input tempo data that emphasizes recent walking steps.

  Note that the weighting function is not limited to the shape shown in the upper diagram of FIG. 6 and may be changed as appropriate according to the application. In addition, as in the above example, time weighting may be added to the number of steps, weighting may be performed on time or a specific tempo, or weighting may be performed depending on the strength of steps. Good.

  FIG. 7 is a diagram showing a flow of music selection processing in the portable music player according to the present embodiment. As shown in FIG. 7, first, processing is started in step S1, and a search input tempo is determined from walking step information for a predetermined period in the past in step S2. In step S3, the search input tempo determined in step S2 is compared with the previous search input tempo. If the tempos are the same, the process proceeds to step S5 to select a song from the previous list. If the tempos are different or there is no previous search input tempo, the process proceeds to step S4.

  In step S4, the music DB is searched based on the input tempo for search, and songs having a tempo close to the input tempo are listed. Next, in step S5, the music is selected from the list. The music selected in step S6 is reproduced. If a song change input operation such as cueing or list updating is performed during playback in step S7, the process returns to step S2. If there is an end command by the input operation, the process ends in S10. When the reproduction of the music is finished without any input operation, the process returns to step S2, and the search input tempo is determined again. If the list reproduction is not performed, steps S3 and S5 may be passed. In this case, in step S4, a song close to the search input tempo is selected from the song database.

  FIG. 8 is a diagram showing the flow of another music selection process in the portable music player according to the present embodiment. As shown in FIG. 8, first, in step S11, the process is started, and in step S12, a search input tempo is determined from information on a past walking step for a certain period. In step S13, the search input tempo determined in step S12 is compared with the previous search input tempo. If the tempos are the same, the process proceeds to step S15 to select a song from the previous list. If the tempos are different or there is no previous search input tempo, the process proceeds to step S14. In step S14, the music DB is searched based on the input tempo for search, and songs having a tempo close to the input tempo are listed.

  Next, in step S15, the music is selected from the list. The music selected in step S16 is reproduced. If a list update command is issued in step S17, the process returns to step S12, and the search input tempo is determined again. In step 18, when a re-selection command such as cueing is issued, the process returns to step S15, and re-selection is performed from the music list. If an end command is issued in step S19, the process ends in step S21. If there is no input operation, the music continues to be played back, and if playback ends in step S20, the process returns to step S15 to re-select the music from the list.

  As described above, according to the portable music playback device of the present embodiment, the walking step is detected based on the vibration transmitted to the device main body by the detection device, and the walking step for a past period is stored in the memory. . The control unit analyzes a walking step during a certain period in the past, and generates a search input tempo. Several tunes having a tempo that matches the generated input tempo for search are listed from a plurality of tunes stored in the storage unit. The music to be reproduced next is selected from the listed music. The selected music is output by the audio output unit, and the information of the selected music is displayed by the display unit.

  In addition, as a method of generating the search input tempo from a walking step of a certain period in the past, as a paused state, when the interval of the walking step is determined to be stopped, paused, and exceeds the preset upper limit value, and the lower limit If it falls below the value, it is considered not walking. In this case, no step is detected. If the suspended state continues for a certain period of time or more, the list is considered to be suspended and the list is updated. A tempo song that does not normally become a walking step may be updated in the list.

  In addition, it is a step that is not related to the current mood, and for example, it is possible to select a song by taking a walking step in accordance with the tempo of a song that the user wants to hear next.

    The present invention can be used for a portable music player. For example, the present invention can also be applied to a dual-purpose machine such as a dedicated music playback machine, a mobile phone, and a PC.

It is a functional block diagram which shows the structural example of the portable music reproduction apparatus by one embodiment of this invention. It is a functional block diagram which shows the structural example of the portable music reproduction apparatus by one embodiment of this invention. FIG. 3 shows an analysis method based on walking steps, in which the horizontal axis represents time and the vertical axis represents tempo. FIG. 4 is an analysis method based on walking steps, in which the horizontal axis represents time and the vertical axis represents tempo. FIG. 5 is a diagram showing an example of the change in walking tempo during walking, the number of steps, time, and the magnitude relationship between them. It is a figure which shows the example in the case of performing weighting. It is a figure which shows the flow of the music selection process in the portable music reproduction apparatus by this Embodiment. It is a figure which shows the flow of the music selection process in the portable music reproduction apparatus by this Embodiment.

Explanation of symbols

A ... Portable music playback device, 1 ... Search unit, 3 ... Music database, 5 ... Music list, 7 ... Music playback unit, 11 ... Search rhythm information, 13 ... Walking step analysis unit, 15 ... Walking step detection unit, DESCRIPTION OF SYMBOLS 21 ... Control part, 22 ... Memory | storage part which stores music data, rhythm data for search, 23 ... Operation part, such as a reproduction | regeneration button which reproduces music, 24 ... Detection apparatus which detects a walk step, 25 ... Music information is displayed Display unit 26. Audio output unit for outputting music, 27. Memory.

Claims (11)

A portable music player,
A music database for storing music data;
Vibration detecting means for detecting vibration transmitted to the portable music player;
Tempo extraction means for extracting a tempo according to the detected vibration;
Based on the extracted tempo, music selection means for selecting a music suitable for the tempo extracted from a plurality of music data in the music database;
A portable music playback device comprising: playback means for playing back the music selected by the music selection means.   2. The portable music playback device according to claim 1, wherein the vibration detection means monitors a change in a tempo of vibration related to walking, and searches for music again according to the change.   The portable music player according to claim 1 or 2, wherein the vibration transmitted to the portable music player is a vibration caused by a walking step.   The portable music player according to any one of claims 1 to 3, wherein a plurality of songs suitable for the extracted tempo are listed and presented.   5. The portable music according to claim 1, wherein the tempo extracting unit updates the music selection when the vibration detection is continuously stopped for a predetermined time or more. 6. Playback device.   The portable device according to any one of claims 3 to 5, wherein when the vibration interval caused by the walking step exceeds a predetermined upper limit value or falls below a lower limit value, it is considered that the user is not walking. Music playback device.   The portable music playback device according to any one of claims 1 to 6, wherein the tempo extraction means extracts a tempo based on a characteristic relating to a preset tempo. Obtaining a walking step for a certain period in the past;
Determining a search tempo from the walking step;
Extracting music based on the search tempo;
And a step of playing back the extracted music. Obtaining a walking step for a certain period in the past;
Determining a search tempo from the walking step;
Extracting a suitable music list based on the search tempo;
And a step of selecting and reproducing a song to be reproduced based on the extracted song list.   The program for making a computer perform the step of Claim 8 or 9. A portable music player,
Vibration detecting means for detecting vibration transmitted to the portable music player;
A portable music playback device comprising music selection means for selecting a music suitable for the vibration extracted from a plurality of music data in the music database based on the extracted vibration.

Images