JP2005221565A - Voice data file storing method and sound-recording processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently divide and store digital voice data. <P>SOLUTION: A sound-recording processor (100) is equipped with a voice processing part (17) which converts an input voice into a digital signal, a control part (18) which performs sound-recording processing for generating digital voice data based upon the converted digital signal and stores the generated voice data, and an operation part (13) which generates an event based upon user's operation. The control part generates a management files each time a start event of sound-recording processing is generated, generates a data file storing voice data each time the sound-recording processing starts, and records additional information regarding a data file being generated in the management file. Further, a voiceless section is detected from a digital signal corresponding to an input voice and when the voiceless section is detected, the sound-recording processing is stopped; when a voiced sound is detected from the digital signal after the sound-recording processing is stopped, sound-recording processing using a new data file is started. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for storing a data file of audio data in digital recording processing.

  2. Description of the Related Art Conventionally, a technique has been proposed in which audio data is divided into a plurality of files and stored so that the user can easily select audio data that the user wants to reproduce from digitally recorded audio data. As this type of technology, for example, there is one described in Patent Document 1 described later. The method of Patent Document 1 is to detect a silent section from existing speech data such as a language teaching material, and to set a boundary in the silent section, thereby dividing a series of data for each sentence.

In recent years, so-called IC recorder devices for digitally recording audio in conferences and performances have become widespread. However, even when a series of audio data is to be divided and stored in this device, silent sections are used. It is conceivable to use a conventional method that utilizes the above.
JP 2003-307997 A

  However, in order to use the above-described conventional method, an editing operation for separately performing the above-described division processing after acquiring a series of audio data by recording processing is required. In addition, it is possible to interrupt the recording by manual operation of the user at an arbitrary time point during the recording, thereby saving the audio data in small pieces, but such work is performed by the user participating in the conference etc. Is bothersome and inconvenient.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a method capable of efficiently dividing and storing audio data generated by a recording process.

  The audio data file storage method according to the present invention creates a management file and a data file for storing audio data when a recording process start event for generating digital audio data based on input audio is detected, and adds the data file. Information is recorded in the management file, and when the silent section of the input voice is detected after the recording process is started, the recording process is stopped, and when sound is detected after the stop, the recording process using a new data file is started. At the same time, new additional information relating to the new data file is recorded in the management file.

  A recording processing apparatus according to the present invention includes a sound processing unit that converts input sound into a digital signal, a control unit that performs recording processing for generating digital sound data based on the converted digital signal, and stores the generated sound data; An operation unit for generating an event based on a user operation, the control unit creating a management file for each occurrence of a recording process start event, and a data file for storing audio data for each start of a recording process Recording means, means for recording additional information relating to the data file being created in the management file, and means for detecting a silent section from a digital signal corresponding to the input voice, and recording when a silent section is detected. Stops processing, and when sound is detected from the digital signal after the stop, recording processing using a new data file is started. .

  According to the present invention, since the additional information of the data file is recorded each time in parallel with the intermittent recording process using the detection of the silent period, without performing the editing operation of the audio data separately, Audio data can be divided and stored efficiently.

[Example]
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of a recording processing apparatus according to the present invention. The recording processing apparatus according to the embodiment is a mobile phone 100 having a wireless communication function. As shown in FIG. 1, an antenna 10 and a wireless unit 11 that transmits and receives radio waves to a base station (not shown) via the antenna 10. A display unit 12 for displaying a screen, an operation unit 13 for user operation, a speaker 14 and a receiver 15 as sound output means, a microphone 16 as sound input means, and a sound for performing sound input / output processing. The processing part 17 and the control part 18 which controls operation | movement of the mobile telephone 100 by CPU18a and the memory 18b are provided.

  When the mobile phone 100 performs a wireless communication function, the wireless unit 11 selects a signal frequency to be received from the signal received by the antenna 10, performs frequency conversion and amplification, demodulates the signal, and demodulates the received data. Generate and output to the control unit 18. The control unit 18 processes the received data and outputs an audio signal to the audio processing unit 17. The audio processing unit 17 causes the receiver 15 to output audio by changing the received audio signal to an analog signal. The voice input from the microphone 16 during a call is converted into a digital signal by the voice processing unit 17, and the control unit 18 processes the signal into transmission data, which is modulated by the radio unit 11 and specified. The signal is amplified as a frequency carrier wave and transmitted from the antenna 10.

  On the other hand, when the mobile phone 100 performs the sound recording function, the control unit 18 starts the recording process by detecting the recording start event emitted from the operation unit 13, and then detects the recording end event. To complete the recording process. Each event from the operation unit 13 is generated, for example, when a user performs a predetermined key operation on the mobile phone 100. In the recording process, the voice processing unit 17 converts the voice input from the microphone 16 into a digital signal. The control unit 18 converts the digital signal according to a predetermined voice data coding method until a certain silent section is detected, thereby creating voice data. Further, the created audio data and additional information described later are stored in a predetermined file in the memory 18b.

  The basic procedure of the recording process controlled by the control unit 18 will be described with reference to FIG. First, triggered by the occurrence of the recording start event EV1 from the operation unit 13, the microphone 16 is turned on to start the voice data recording process. After the start, the voice data A is sequentially stored in the voice data file a1. When the silent section of the audio data is detected for a certain time, the recording operation is temporarily stopped and the audio data file a1 is closed. Thereafter, when the sound level is detected, the sound data B is stored in the new sound data file a2 until the silent section of the sound data is detected.

  Next, after the audio data C is stored in the audio data file a3 in the same procedure, when the audio data D is recorded, the operation unit 13 issues a file save event EV2, that is, a divided save instruction by a user operation, at that time The previous audio data D is stored in the audio data file a4, and the subsequent audio data E is sequentially stored in the new audio data file a5. Then, triggered by the recording stop event EV3 from the operation unit 13, the microphone 16 is turned off to stop the audio data recording process and close the audio data file a5.

  In this way, each time a silent section of the voice is detected, the voice data is divided into new voice data files and stored, so that the file can be divided in parallel with the recording process, thereby completing the recording. Later, skip playback (cue playback) can be performed in units of data files.

  FIG. 3 shows the file structure of the memory 18b. The cellular phone 100 according to the embodiment has a tree-type file structure, and stores an audio data directory 102 in the root directory 101 and an audio data subdirectory 103 in the audio data directory 102 as shown in FIG. Store. The audio data subdirectory 103 stores audio data of a series of recording processes from the start to the end of recording instructed by a user operation. Therefore, for example, after the audio data subdirectory 103 (001) is completed, when a recording start instruction is given separately from the user, a new audio data subdirectory 103 (ZZZ) is created.

  The audio data subdirectory 103 includes a playlist management file 104, a track management file 105, and an audio data file 106 (a1,..., An) as described with reference to FIG.

  FIG. 4 shows a configuration example of the playlist management file 104. The playlist management file 104 stores a list of audio data files 106 to be divided and stored, and information for associating each file 106, that is, information for identifying the creation order of each file. In the illustrated example, the identification code of each audio data file 106, the count value when recording of the audio data is started, and the count value at the end of recording are recorded. The count value is provided by a timer mechanism (not shown) of the control unit 18. The information shown in FIG. 4 indicates the recording of each audio data file 106 (a1 to a5) in the basic procedure described with reference to FIG. 3. As the latest recording, a new audio data file ( A state in which the audio data E is being stored is shown in a5).

  The playlist management file 104 described above corresponds to the management file according to the present invention, and the recorded information shown in FIG. 4 corresponds to the additional information according to the present invention. By creating this additional information, it is possible to record which audio data file 106 exists in the audio data subdirectory 103 and in what order they are created. The example shown in FIG. 4 records the recording start and end count values for each audio data file 106. However, the information can be a list of each file and identify the creation order thereof. For example, the additional information according to the present invention is not limited to the illustrated information.

  FIG. 5 shows a configuration example of the track management file 105 of the audio data subdirectory 103. The track management file 105 stores information to be referred to when audio data corresponding to the audio data subdirectory 103 is reproduced. For example, the file storage format, the audio data coding type, and the audio data collection cycle The sampling rate etc. which are are stored. In the example shown in the figure, it is shown that audio data encoded by the PCM method at a sampling period of 22 kHz is stored in a conventionally known WAVE format.

  A procedure for carrying out the audio data file storage method of the present invention by the cellular phone 100 will be described with reference to the flowchart of FIG. First, when the recording start event EV1 of the operation unit 13 occurs (step S1: Yes), the control unit 18 plays the playlist management file 104 and the track management file 105, which are files including additional information, and the audio after starting recording. An audio data file 106 (a1) for storing data is created (step S2). Thereby, the audio data sub-directory 103 is formed.

  Next, the count value at the start of recording as shown in FIG. 4 is recorded in the playlist management file 104, and the created voice data file 106 (a1) is opened (step S3), and the voice input from the microphone 16 is digitally recorded. It is converted into a signal and buffered by a predetermined amount (step S4), converted into audio data, and sequentially stored in the audio data file 106 (a1) in the memory 18b (step S5).

  When the control unit 18 detects a silent section for a certain period of time from the created audio data or detects the occurrence of a file storage event EV2 from the operation unit 13 (step S6: Yes), the control unit 18 The recording process is stopped and the audio data file 106 (a1) is closed (step S7). At this time, the recording end count value as shown in FIG. 4 is recorded in the playlist management file 104.

  Thereafter, when the sound level is detected in the input value from the microphone 16 (step S8: Yes), a new audio data file 106 (a2) is created (step S9), and the playlist management file is created for this new file. Additional information is recorded in 104 (step S10). Thereafter, the procedure from step S4 is repeated, and additional information about the audio data file 106 (a3,..., An) is sequentially recorded in the playlist management file 104 in accordance with the recording process to be executed.

  Note that after the recording process is stopped by detecting the silent section, no sound is detected (step S8: No), and when the recording stop event EV3 is issued (step S11: Yes), the microphone 16 is turned off. Turn OFF to end the recording process. Further, when there is no silent section detection or file saving event EV2 during the recording process, that is, while the recording process is continuing (step S6: No), there is a recording stop event EV3 from the operation unit 13 (step S12: Yes). The audio data file 106 is closed (step S13), the end of recording is recorded in the playlist management file 104 (step S14), the microphone 16 is turned off, and the recording process is ended.

  As described above, according to the cellular phone 100 of the embodiment, the audio data is divided and stored and the additional information is updated in parallel with the recording process from the ON to the OFF of the microphone 16. It is possible to record efficiently. As a result, the audio data can be selectively reproduced immediately after the recording operation without performing another editing operation.

[Other embodiments]
In the embodiment described above, the voice data is divided by creating a new voice data file 106 every time a silent section is detected. However, in the present invention, the voice data is further divided by another method described below. Division can be achieved. The method will be described below with reference to FIGS.

  In the method shown in FIG. 7, when a predetermined keyword such as “but”, “in short”, “according” or the like is included in the voice input from the microphone 16 during the recording process, for example, a new keyword is added at that time. The sound data file 106 is switched to. In order to realize this method, the predetermined keyword as described above is input through the operation unit 13 and registered in the memory 18b before the start of recording of the audio data.

  When the voice input from the microphone 16 is converted into a digital signal by the voice processing unit 17, the control unit 18 compares the signal with a keyword registered in the memory 18 b in advance, and if both match, A sound data file 106 is created. Then, audio data corresponding to the keyword is stored in this file, and subsequent audio data is sequentially stored until a new keyword is detected thereafter. In this way, by dividing the voice data using keywords such as the above-mentioned conjunctions, it is possible to divide and record for each purpose of the conversation.

  In addition, according to the present invention, a new audio data file 106 can be automatically created when a predetermined period has elapsed. In that case, before starting the recording of the audio data, a time interval for storing the audio data divided into a plurality of files is set in a timer mechanism (not shown) of the control unit 18. This time interval is set with respect to the absolute time including the silent period after the start of recording, or the cumulative total of the recording time excluding the silent period, and a new audio data file 106 is created when the period elapses. .

  Specifically, the method using the cumulative total of the recording time described above has, as shown in FIG. 8, the recording time of the audio data B by the audio data file 106 (a2) has reached a preset upper limit period. At this time, a new audio data file 106 (a3) is created, and this file is used as a storage location of the audio data C by the subsequent recording process. Thereby, even in a situation where it is difficult for a silent section to appear in the voice, the voice data can be automatically divided when a preset period has elapsed.

  The method of dividing by a predetermined keyword as described above or dividing every predetermined period is not limited to the method of dividing every silent section as in the mobile phone 100 of the embodiment, and does not detect the silent section. You may apply to.

  In the embodiments, the example in which the present invention is applied to a mobile phone has been described. However, the present invention is not limited to this, and can be applied to, for example, an IC recorder device, a simple voice memo device, and the like.

It is a block diagram which shows the structure of the mobile telephone of the Example by this invention. It is explanatory drawing for demonstrating the basic procedure of the recording process of an Example. It is explanatory drawing for demonstrating the file structure of an Example. It is explanatory drawing for demonstrating the play list management file of an Example. It is explanatory drawing for demonstrating the track management file of an Example. It is a flowchart which shows the procedure of the audio | voice data file storage method of an Example. It is explanatory drawing for demonstrating the basic procedure of the recording process by another Example. It is explanatory drawing for demonstrating the basic procedure of the recording process by another Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Mobile phone 10 Antenna 11 Radio | wireless part 12 Operation part 13 Operation part 14 Speaker 15 Receiver 16 Microphone 17 Audio | voice processing part 18 Control part 18a CPU
18b memory

Claims (12)

  When a recording process start event for generating digital audio data based on input audio is detected, a management file and a data file for storing audio data are created, and additional information relating to the data file is recorded in the management file, and the recording process is performed. When the silent section of the input voice is detected after the start of the recording, the recording process is stopped, and when the sound is detected after the stop, the recording process using the new data file is started and a new addition regarding the new data file is started. An audio data file storage method comprising: recording information in the management file.   2. The audio data file storage method according to claim 1, wherein, after detecting the recording process start event, a recording process using a new data file is started each time a predetermined keyword is detected from the input voice.   2. The audio data file storage method according to claim 1, wherein a new data file is created every elapse of a predetermined period after detection of the recording process start event.   4. The audio data file storage method according to claim 3, wherein the progress of the predetermined period is monitored based on the total execution time of the recording process.   When a recording process start event for generating digital audio data based on input audio is detected, a management file and a data file for storing audio data are created, and additional information relating to the data file is recorded in the management file, and the recording Each time a predetermined keyword is detected from the input sound after detecting a processing start event, recording processing using a new data file is started and new additional information relating to the new data file is recorded in the management file. An audio data file storage method characterized by the above.   When a recording process start event for generating digital audio data based on input audio is detected, a management file and a data file for storing audio data are created, and additional information relating to the data file is recorded in the management file, and the recording Each time a predetermined period elapses after detection of a process start event, recording processing using a new data file is started and new additional information relating to the new data file is recorded in the management file. Audio data file storage method.   7. The audio data file storage method according to claim 1, wherein information for identifying a creation order of the data file is recorded as the additional information. An audio processing unit that converts input audio into a digital signal, a recording unit that generates digital audio data based on the converted digital signal, stores the generated audio data, and generates an event based on a user operation With an operation unit,
The control unit includes means for creating a management file for each occurrence of a recording process start event, means for creating a data file for storing audio data for each start of the recording process, and additional information regarding the data file being created. It has means for recording in the management file and means for detecting a silent section from the digital signal corresponding to the input voice. When the silent section is detected, the recording process is stopped, and then the voice is detected from the digital signal after the stop. When this is done, the recording processing apparatus starts recording processing using a new data file.   9. The control unit according to claim 8, further comprising means for detecting a predetermined keyword from a digital signal of the input voice, and starting recording processing using a new data file each time the keyword is detected. Recording processing device.   9. The recording processing apparatus according to claim 8, wherein the control unit includes means for monitoring a period after the start event of the recording process occurs, and creates a new data file every time a predetermined period elapses.   The recording processing apparatus according to claim 10, wherein the control unit monitors the elapse of the predetermined period based on a cumulative execution time of the recording process.   The recording processing apparatus according to claim 8, further comprising a wireless communication unit.

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