JP2008112494A - Audio reproducing device, audio reproducing method and program, audio recording device, audio recording method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an audio reproducing device which can reproduce music with stable volume in either random play or normal play. <P>SOLUTION: The audio reproducing device is provided with; an input means for inputting a reproduction mode of audio data; and a volume correction means which automatically corrects a volume level value of output volume using a first volume correction value, when audio data in a group is determined to be reproduced at random based on an input reproduction mode and automatically corrects the volume level value of the output volume using a second volume correction value when the audio data of the group is determined to be reproduced in order. In this way, volume can be corrected by automatically changing a volume correction value in normal play and random play and music can be reproduced with a stable volume in either the random play or the normal play. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an audio playback apparatus for playing back audio data.

  In general, the volume of music or voice audio signals is corrected by the device to be played. However, there may be a difference in volume due to a difference in audio signal source or media. In Patent Document 1 shown below, a volume correction value for correcting the volume is stored for each song or for each unit including a plurality of songs such as an album, and the volume at the time of reproduction is determined using the correction value. An audio playback apparatus that adjusts the volume so as to be constant is described.

JP 2005-11432 A

  In the audio playback apparatus described in Patent Document 1, in the case of random play in which the order of songs to be played is changed at random, even if the volume is corrected for each song, no problem occurs for the listener user. . However, in the case of normal play played through an album, for example, when multiple songs are connected and played, or when the album contains quiet songs that originally had a low volume, the volume is corrected for each song. May cause a sense of discomfort to the user due to the volume difference between songs.

  Examples of problems to be solved by the present invention include the above. It is an object of the present invention to provide an audio playback apparatus that can play music with a stable volume in both random play and normal play, without the user being particularly conscious.

  The invention according to claim 1 is an audio recording apparatus, wherein the first sound volume correction value calculating means for calculating a first sound volume correction value for audio data and the audio data for each group corresponding to an audio source. Second sound volume correction value calculating means for calculating a common second sound volume correction value and the audio data are linked to the first sound volume correction value and the second sound volume correction value and recorded on a recording medium. Recording means.

  The invention according to claim 9 is an audio recording method, the first volume correction value calculating method for calculating a first volume correction value for audio data, and the group of audio data for each group corresponding to an audio source. A second volume correction value calculation method for calculating a common second volume correction value, and the audio data are linked to the first volume correction value and the second volume correction value and recorded on a recording medium. A recording method.

  The invention according to claim 10 is an audio recording program executed by a computer, and corresponds to a first volume correction value calculation means for calculating a first volume correction value for audio data, and the audio data corresponds to an audio source. Second volume correction value calculation means for calculating a second volume correction value common to each group to be recorded, and the recording medium by linking the first volume correction value and the second volume correction value for the audio data The computer is caused to function as recording means for recording in

  According to an eleventh aspect of the present invention, audio data is reproduced from a recording medium in which a first volume correction value and a second volume correction value common to each group corresponding to the audio source are recorded. An audio playback device that determines whether the audio data of the group is played back randomly based on the input means for inputting the playback mode of the audio data and the input playback mode. When the volume level value of the output volume is automatically corrected using the first volume correction value and it is determined that the audio data of the group is reproduced in order, the second volume level is determined. Volume correction means for automatically correcting the volume level value of the output volume using the correction value.

  According to a twelfth aspect of the present invention, audio data is reproduced from a recording medium in which a first volume correction value and a second volume correction value common to a group for each audio source are recorded. When it is determined that the audio data of the group is to be reproduced at random based on the input method for inputting the reproduction mode of the audio data and the input reproduction mode, When the first volume correction value is used to automatically correct the volume level value of the output volume, and it is determined that the audio data of the group is reproduced in order, the second volume correction value And a volume correction means for automatically correcting the volume level value of the output volume.

  The invention according to claim 13 reproduces the audio data from the recording medium in which the first sound volume correction value and the second sound volume correction value common to the group for each audio source are recorded. An audio reproduction program executed by a computer, wherein the audio data of the group is determined to be randomly reproduced based on the input means for inputting the reproduction mode of the audio data and the inputted reproduction mode In this case, the volume level value of the output volume is automatically corrected using the first volume correction value, and if it is determined that the audio data of the group is reproduced in order, the first volume correction value is The computer functions as a volume correction means for automatically correcting the volume level value of the output volume using the volume correction value of 2. To.

  In one aspect of the present invention, the audio recording apparatus includes a first sound volume correction value calculating unit that calculates a first sound volume correction value for audio data, and a first common sound volume for each group corresponding to an audio source for the audio data. Second sound volume correction value calculating means for calculating a sound volume correction value of 2, and recording means for linking the first sound volume correction value and the second sound volume correction value and recording them on a recording medium for the audio data .

  The audio recording apparatus includes first volume correction value calculation means, second volume correction value calculation means, and recording means. The first sound volume correction value calculating means calculates a first sound volume correction value for the audio data. The second sound volume correction value calculating means calculates a second sound volume correction value common to each group corresponding to an audio source for the audio data. The recording means links the first sound volume correction value and the second sound volume correction value and records the audio data on a recording medium. In this way, the audio data can be recorded by linking different audio volume correction values depending on the reproduction mode.

  Another aspect of the above audio recording apparatus further includes means for recording the identification number of the group, and the second volume correction value calculating means records audio data of a predetermined audio source on the recording medium. In this case, based on the identification number of the predetermined audio source and the identification number of the group, it is determined whether or not the audio data of the predetermined audio source exists in the recording medium. The first sound volume correction value for the first audio data of the predetermined audio source is set as the second sound volume correction value for the first audio data, The recording means records the first audio data on a recording medium by linking the first volume correction value and the second volume correction value. To. Thus, when the audio data of the predetermined audio source is recorded on the recording medium for the first time, the first sound volume correction value and the second volume of the audio data of the predetermined audio source to be recorded are recorded. Volume correction values can be linked and recorded.

  In another aspect of the audio recording device, the second sound volume correction value calculating unit determines that the audio data of the predetermined audio source is present in the recording medium. The second volume correction value of the audio data of the group corresponding to the predetermined audio source already recorded on the second audio data and the second audio data recorded in addition to the recording medium of the predetermined audio source The second sound volume correction value is set to a common value, and the recording means uses the first sound volume correction value and the second sound volume correction value, which are the common value, for the second audio data. The audio data of the group corresponding to the predetermined audio source recorded on the recording medium is set to a common value while being linked and recorded on the recording medium. To link the serial second volume correction value is recorded. In this way, in the case where the audio data of the predetermined audio source is recorded on the recording medium for the second time or later, the first volume correction value for the audio data of the predetermined audio source to be recorded, and The second volume correction value can be linked and recorded.

  In a preferred embodiment of the above audio recording apparatus, the second volume correction value calculating means obtains an average volume level value of the entire group corresponding to the audio source, and the average volume level value and the volume level of the output volume are obtained. The difference from the value is calculated as the second sound volume correction value.

  In a preferred embodiment of the above audio recording apparatus, the second volume correction value calculating means obtains an average of average volume level values for each of the audio data of the group corresponding to the audio source, and the average and the output volume Is calculated as the second sound volume correction value.

  In a preferred embodiment of the audio recording apparatus, the second volume correction value calculating means calculates an average of the first volume correction values of the audio data of the group corresponding to the audio source as the second volume correction. Calculate as a value.

  In a preferred embodiment of the above audio recording apparatus, the second sound volume correction value calculating means calculates a minimum value of the first sound volume correction value of the audio data of the group corresponding to the audio source as the second sound volume. Calculated as a correction value. Thereby, the magnitude of the second volume correction value can be minimized.

  In a preferred embodiment of the above audio recording apparatus, the second sound volume correction value calculating means is configured such that the first sound volume correction value of the second audio data is recorded on the recording medium. If it is smaller than the second volume correction value common to a plurality of audio data included in the group corresponding to the source, the first volume correction value of the second audio data is set to the second audio data. The second volume correction value for the data and the audio data of the group corresponding to the predetermined audio source already recorded on the recording medium is used.

  In another aspect of the present invention, an audio recording method includes a first sound volume correction value calculation method for calculating a first sound volume correction value for audio data, and a common first sound volume correction value calculation method for each group corresponding to an audio source for the audio data. A second volume correction value calculating method for calculating a volume correction value of 2, and a recording method for recording the audio data on a recording medium by linking the first volume correction value and the second volume correction value. . Also with this method, the audio data can be recorded by linking different audio volume correction values depending on the playback mode.

  In still another aspect of the present invention, an audio recording program executed by a computer corresponds to a first volume correction value calculation unit that calculates a first volume correction value for audio data, and an audio source for the audio data. A second volume correction value calculating means for calculating a second volume correction value common to each group; the audio data is linked to the recording medium by linking the first volume correction value and the second volume correction value; The computer is caused to function as recording means for recording. Also with this recording program, the audio data can be recorded by linking different volume correction values depending on the playback mode.

  In still another aspect of the present invention, the audio data is recorded from a recording medium in which a first volume correction value and a second volume correction value common to each group corresponding to the audio source are recorded. The audio playback device to play back, when it is determined that the audio data of the group is played back randomly based on the input means for inputting the playback mode of the audio data and the input playback mode, The volume level value of the output volume is automatically corrected using the first volume correction value, and if it is determined that the audio data of the group is reproduced in order, the second volume correction is performed. Volume correction means for automatically correcting the volume level value of the output volume using the value. In this way, the volume correction value can be automatically switched between normal play and random play to perform volume correction, and music can be played at a stable volume in both random play and normal play. it can.

  In still another aspect of the present invention, audio data is reproduced from a recording medium in which a first volume correction value and a second volume correction value common to a group for each audio source are recorded. When the audio playback method determines that the audio data of the group is played back at random based on the input method for inputting the playback mode of the audio data and the input playback mode, the audio playback method When the volume level value of the output volume is automatically corrected using the volume level correction value of 1 and it is determined that the audio data of the group is reproduced in order, the second volume level correction value is set. And a volume correction method for automatically correcting the volume level value of the output volume. According to this method, the volume correction value can be automatically switched between normal play and random play to perform volume correction, and music can be reproduced at a stable volume in both random play and normal play.

  In still another aspect of the present invention, audio data is reproduced from a recording medium in which a first volume correction value and a second volume correction value common to a group for each audio source are recorded. When the audio playback program executed by the computer determines that the audio data of the group is played back at random based on the input means for inputting the playback mode of the audio data and the input playback mode In this case, the volume level value of the output volume is automatically corrected using the first volume correction value, and if it is determined that the audio data of the group is reproduced in order, the second volume level is corrected. The computer is made to function as volume correction means for automatically correcting the volume level value of the output volume using the volume correction value of . According to this program, the volume correction value can be automatically switched between normal play and random play to perform volume correction, and music can be reproduced at a stable volume in both random play and normal play. The audio reproduction program can be handled in a state stored in a storage medium.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

(Configuration of audio playback / recording device)
FIG. 1 shows the configuration of an audio playback / recording apparatus 100 according to this embodiment. In FIG. 1, an audio playback / recording apparatus 100 includes an audio recording apparatus 100a and an audio playback apparatus 100b.

  The audio recording device 100a includes an audio source 10, an audio source reading unit 11, a volume correction value calculation unit 12, an encoder 13, a data writing unit 14, a correction value reading unit 8, and a recording medium 15. Here, the volume correction value calculation unit 12, the data writing unit 14, and the correction value reading unit 8 are functions realized by the control unit 16 executing a program recorded in, for example, a memory. Here, the control unit 16 is, for example, a DSP (Digital Signal Processor). The control unit 16 receives a recording or reproduction instruction from the user via the operation unit 9 as a signal.

  The audio source 10 is a recording medium such as a CD (Compact Disc) in which music and audio audio signals that have not been subjected to volume correction are recorded. The audio source reading unit 11 reads audio data from the audio source 10. The volume correction value calculation unit 12 calculates a volume correction value for the audio data. The encoder 13 encodes and compresses audio data. The correction value reading unit 8 reads the volume correction value from the volume correction value calculation unit 12. The data writing unit 14 links the encoded audio data and the volume correction value read by the correction value reading unit 8 and records them in the recording medium 15. The volume correction value calculation unit 12 functions as a first volume correction value calculation unit and a second volume correction value calculation unit in the present invention, and the data writing unit 14 functions as a recording unit in the present invention.

  The audio playback device 100b includes a data reading unit 17, a volume correction value setting unit 18, a decoder 19, a volume correction unit 20, and a main volume 21. Here, the data reading unit 17, the volume correction value setting unit 18, and the volume correction unit 20 are functions realized when the control unit 16 executes a program recorded in, for example, a memory. The volume correction value setting unit 18 here functions as a volume correction value setting unit in the present invention, and the volume correction unit 20 functions as a volume correction unit in the present invention.

  The data reading unit 17 reads the audio data and the sound volume correction value recorded on the recording medium 15. At this stage, the read audio data is encoded. The decoder 19 decodes this audio data. The volume correction value setting unit 18 sets the volume correction value to the corresponding audio data. The main volume 21 is for manually adjusting the volume level value of the output volume output from a speaker (not shown) of the audio playback device 100b. By adjusting the main volume 21, the user can set the volume level value of the output volume to a desired value. The volume correction unit 20 corrects the volume level value of the output volume with a volume correction value corresponding to the audio data to be reproduced. Here, the encoder 13 may also encode and compress the volume correction value. In this case, the decoder 19 also decodes the sound volume correction value. In the following description, as an example, the audio data is assumed to be music audio data.

(Audio data recording process)
Next, audio data recording processing will be described. FIG. 2 shows a flowchart of the audio data recording process.

  The volume correction value calculation unit 12 reads the audio data from the audio source 10 and calculates a volume correction value for the audio data for each song (step S101). Also, the volume correction value calculation unit 12 calculates a volume correction value for the audio data for each album (step S102). In the following description, the volume correction value for audio data for each song is referred to as a first volume correction value, and the volume correction value for audio data for each album is referred to as a second volume correction value. A specific method for calculating the first sound volume correction value and the second sound volume correction value will be described in detail later.

  The encoder 13 encodes audio data (step S103). The data writing unit 14 links the encoded audio data and the first and second volume correction values read by the correction value reading unit 8 and records them in the recording medium 15 (step S104).

  FIG. 3 is a schematic diagram showing a state of linking audio data and first and second volume correction values. In the example illustrated in FIG. 3A, it is assumed that audio data of three songs of music data A, music data B, and music data C in the album Y is read as audio data read from the audio source 10.

  Here, the first volume correction value for music data A is a volume correction value a, the first volume correction value for music data B is a volume correction value b, and the first volume correction value for music data C is the first volume correction value. Is a volume correction value c. Further, the second volume correction value of the album in which the music data A, B, and C are collected is set as a volume correction value y. In this case, as shown in FIG. 3A, the first sound volume correction value and the second sound volume correction value are linked to one piece of music data. For example, volume correction value a and volume correction value y are linked to music data A, volume correction value b and volume correction value y are linked to music data B, and volume correction value c is linked to music data C. And the volume correction value y are linked.

  The audio source 10 is not limited to an album composed of a plurality of audio data. Instead, for example, a single composed of a single audio data may be used. The example shown in FIG. 3B shows a case where music data G in single X and one music data E in album Z are read. Here, the first volume correction value for the music data G is a volume correction value g, and the second volume correction value is a volume correction value x. Further, the first volume correction value for the music data E is set as a volume correction value e, and the second volume correction value is set as a volume correction value z. Even in this case, the music data G is linked with the volume correction value g and the volume correction value x, and the music data E is linked with the volume correction value e and the volume correction value z.

  That is, for audio data such as music data recorded on a recording medium, a common second volume correction value is linked for each group corresponding to an audio source such as single X, album Y, and Z.

  Furthermore, as shown in FIG. 3C, the volume correction value y as the second volume correction value may be directly provided as the attribute value for each of the music data A, B, and C.

  As shown in FIG. 4, the audio data such as the music data described above includes, as identification information, first and second volume correction values to be linked, second volume correction value, TOC (Table of Contents) information, Date information such as recording date is recorded. This TOC information functions as identification information for identifying a group corresponding to the audio source.

  The volume correction value calculation unit 12 can determine whether the audio data of the audio source 10 has already been recorded on the recording medium 15 by using the identification information such as the TOC information.

  Specifically, when the audio data of the audio source 10 is recorded on the recording medium 15, the volume correction value calculation unit 12 determines the audio source 10 based on the identification number of the audio source 10 and the group identification number. It is determined whether or not the audio data exists in the recording medium 15. If it is determined that the audio data does not exist, the value of the first sound volume correction value for the audio data of the audio source 10 is set as the audio source 10. The data writing unit 14 links the first sound volume correction value and the second sound volume correction value with respect to the audio data of the audio source 10 and records the recording medium. Record in 15. Thus, when the audio data of the audio source 10 is recorded on the recording medium 15 for the first time, the first sound volume correction value and the second sound volume correction are performed on the audio data of the audio source 10 to be recorded. Values can be linked and recorded. Accordingly, the audio data of the audio source 10 at this time corresponds to the first audio data in the present invention.

  When the sound volume correction value calculation unit 12 determines that the audio data of the audio source 10 exists in the recording medium 15, the volume correction value calculation unit 12 stores the audio data of the group corresponding to the audio source 10 recorded on the recording medium 15. The value of the second volume correction value and the value of the second volume correction value of the audio data of the audio source 10 are set as a common value, and the data writing unit 14 performs the first volume correction on the audio data of the audio source 10. The value and the second sound volume correction value that is the common value are linked and recorded on the recording medium 15, and the audio data of the group corresponding to the audio source 10 already recorded on the recording medium 15 is a common value. The second volume correction value is linked and recorded. Thus, when the audio data of the audio source 10 is recorded on the recording medium 15 for the second time or later, the first sound volume correction value and the second volume of the audio data of the audio source 10 to be recorded are recorded. The volume correction value can be linked and recorded. Accordingly, the audio data of the audio source 10 at this time corresponds to the second audio data recorded in addition to the recording medium in the present invention.

  As described above, in this embodiment, the audio recording apparatus has the first volume correction value calculation unit that calculates the first volume correction value for the audio data, and the group corresponding to the audio source for the audio data. Second sound volume correction value calculating means for calculating a common second sound volume correction value and recording means for linking the first sound volume correction value and the second sound volume correction value to the recording medium for the audio data. And comprising. In this way, the audio data can be recorded by linking different audio volume correction values depending on the playback mode.

(Audio data playback processing)
Next, audio data reproduction processing will be described. FIG. 5 shows a flowchart of the audio data reproduction process.

  The sound volume correction value setting unit 18 determines whether or not the playback mode is a normal play that is played back through the album based on the operation by the user (step S111), and determines that the play is a normal play (step S111). : Yes), the correction value of the volume level value of the output volume is determined as the second volume correction value (step S112). When it is determined in step S111 that the playback mode is not normal play (step S111: No), the volume correction value setting unit 18 is a random play in which the playback mode randomly changes the order of the songs to be played. If determined, the correction value of the volume level value of the output volume is determined as the first volume correction value (step S113).

  The audio data and the first and second volume correction values recorded on the recording medium 15 are read by the data reading unit 17 (step S114). The audio data is decoded by the decoder 19 (step S115). If the correction value of the volume level value of the output volume is determined to be the first correction value, the volume correction unit 20 uses the first volume correction value recorded linked to the audio data for each song. If the correction value of the volume level value of the output volume is determined to be the second correction value, playback is performed using the second volume correction value recorded linked to the audio data for each album. (Step S116). Thereafter, this process ends.

  In the example shown in FIG. 3A, the volume correction unit 20 determines the volume level value of the output volume when reproducing the music data A when the reproduction mode is determined to be random play. When the music data B is reproduced with the correction value a, the volume level value of the output volume is corrected with the volume correction value b, and when the music data C is reproduced, the volume level value of the output volume is changed to the volume correction value. Correct with c. On the other hand, when it is determined that the playback mode is normal play, the volume correction unit 20 outputs the volume level value of the output volume regardless of the music data A, B, C. Is corrected with the volume correction value y.

  As described above, in this embodiment, the audio data is recorded from the recording medium in which the first volume correction value and the second volume correction value common to each group corresponding to the audio source are recorded. An audio playback apparatus for playing back the audio data, and when it is determined that the audio data of the group is played back at random based on the input means for inputting the playback mode of the audio data and the input playback mode Automatically corrects the volume level value of the output volume using the first volume correction value, and if it is determined that the audio data of the group is played in order, the second volume correction Volume correction means for automatically correcting the volume level value of the output volume using the value. By doing in this way, the audio playback device according to the present embodiment can automatically switch the volume correction value between normal play and random play, and can perform volume correction, in both random play and normal play. Music can be played at a stable volume.

(Volume correction value calculation method)
Next, a method for calculating the volume correction value will be specifically described. As a method of calculating the volume correction value (first volume correction value) for the audio data for each song, (1a) obtaining the volume level value of the average volume of the entire song, and calculating the volume level value of the average volume and the output volume (2a) The volume level value of the volume for each short time is obtained, and the volume level value of the highest peak and the volume level value of the output volume are obtained. There is a method in which the difference is used as the first sound volume correction value.

  Here, as a method of measuring the volume level value of the audio data for each song, a known technique can be applied. For example, the control unit 16 converts the peak value of the signal level for each fixed time of the audio data into an 8-bit 256 level numerical value, and the average value obtained by averaging the peak values for the fixed time is used as the average value of the audio data. It can be a volume level value. Further, when the above method (2a) is used, the volume level value of the peak volume can be matched with the volume level value of the output volume for each song.

  For example, as a method of calculating the volume correction value (second volume correction value) for audio data (song) for each album corresponding to one audio source such as a music CD, (1b) the average volume level value of the entire album And (2b) calculating the average of the average volume level value for each song of the entire album, and calculating the average of the average volume level value and the difference between the volume level value of the output volume and the second volume correction value. And (3b) a method of setting the average of the first volume correction values for each song of the album as the second volume correction value. 4b) The minimum value of the first volume correction value for each song in the album is set as the second volume correction value, that is, the first volume correction value of the audio data of the song having the largest volume level value is set as the second volume correction value. There is a method of setting the volume correction value.

(Specific example of audio data recording process)
Next, a specific example of the recording process of the first and second audio data will be described with reference to the flowchart shown in FIG. In the first and second volume correction value calculation processing methods shown in the flowchart of FIG. 6, the first (1a) or (2a) method described above is used as the first volume correction value calculation method. And the second volume correction value is calculated using the method (4b) described above as a method for calculating the second volume correction value.

  Specifically, the volume correction value calculation unit 12 can determine whether the album has been recorded on the recording medium 15 based on the TOC information recorded in association with the music CD. That is, the volume correction value calculation unit 12 determines whether the audio data of the music CD exists in the recording medium 15 based on the TOC information of the music CD and the TOC information of the recorded album. If it is determined that the data has not been recorded, the first volume correction value for the audio data of the music CD is set as the second volume correction value of the audio data in the album corresponding to the music CD, and data writing is performed. The unit 14 links the first sound volume correction value and the second sound volume correction value and records them on the recording medium 15.

  When the sound volume correction value calculation unit 12 determines that the audio data of the music CD exists on the recording medium 15, the volume correction value calculation unit 12 stores the first audio data of the album corresponding to the music CD recorded on the recording medium 15. The value of the volume correction value of 2 and the value of the second volume correction value of the music CD are set as a common value, and the data writing unit 14 sets the first volume correction value and the audio data of the music CD. The second sound volume correction value, which is a common value, is linked and recorded on the recording medium 15, and the audio data of the album corresponding to the music CD recorded on the recording medium 15 is set to a common value. The second sound volume correction value is linked and recorded on the recording medium 15. Hereinafter, description will be made with reference to the flowchart shown in FIG.

  For example, when the audio source 10 is a music CD, the volume correction value calculation unit 12 determines whether or not the same music CD has already been recorded (step S121), and when it is determined that it has not been recorded (step S121: No), it proceeds to step S123.

  If it is determined that the same music CD has already been recorded (step S121: Yes), the volume correction value calculation unit 12 determines whether or not all songs have been recorded (step S122). If the volume correction value calculation unit 12 determines in step S122 that all songs have been recorded (step S122: Yes), the process is terminated, and if it is determined that all songs have not been recorded (step S122: No). ), Go to step S123.

  In step S123, the volume correction value calculation unit 12 sets 1 to the music number N. Next, the sound volume correction value calculation unit 12 determines whether or not the Nth song has been recorded (step S124). If it is determined that the recording has been recorded (step S124: Yes), the process proceeds to step S130. Specifically, the volume correction value calculation unit 12 records the track No. of the recorded song based on the TOC information recorded in association with the recorded audio data. Track number of the recorded CD song. It is possible to determine whether or not the Nth song has been recorded. This Nth piece of audio data is the second audio data in the present invention.

  If the volume correction value calculation unit 12 determines in step S124 that the Nth song has not been recorded (step S124: No), the volume correction value calculation unit 12 calculates the first volume correction value for the Nth song (step S125), and step S126. Proceed to In step S126, the volume correction value calculation unit 12 determines whether or not the Nth song is larger than 1, and if it is determined that the Nth song is not larger (No in step S126), the process proceeds to step S128 and is determined to be larger. In the case (step S126: Yes), the process proceeds to step S127.

  In step S127, the volume correction value calculation unit 12 determines whether or not the first volume correction value of the Nth song is smaller than the second volume correction value for each album (step S127), and determines that it is not smaller. In that case (step S127: No), the process proceeds to step S129. If the volume correction value calculation unit 12 determines in step S127 that the first volume correction value for the Nth song is smaller than the second volume correction value for each album (step S127: Yes), the Nth song The first volume correction value is set to the second volume correction value for each album (step S128).

  The data writing unit 14 links the audio data and the first and second sound volume correction values and records them in the recording medium 15, and also uses the common second sound volume correction value for the recorded audio data of the album. As a result, the second sound volume correction value is linked and recorded in the recording medium 15 (step S129). In step S130, the volume correction value calculation unit 12 determines whether or not recording has been completed for all songs, and if it is determined that recording has not been completed (step S130: No), after the song number N is advanced by one. (Step S131), the process returns to Step S124. If the sound volume correction value calculation unit 12 determines in step S130 that recording has been completed for all songs (step S130: Yes), the process is terminated.

  As described above, the volume correction value calculation unit 12 applies the first volume correction value of the second audio data to the plurality of audio data included in the group corresponding to the audio source 10 recorded on the recording medium 15. If it is smaller than the common second volume correction value, the minimum first volume correction value of the second audio data is used as the second audio data and the audio source 10 recorded in the recording medium 15. Is the second volume correction value for the audio data of the group corresponding to. By doing in this way, the audio recording device 100a can obtain the first sound volume correction value and the second sound volume correction value, and the second sound volume correction value by using the method (4b) described above. Can be minimized.

  In the present embodiment, the volume correction unit 20 corrects the volume level value of the output volume with the second volume correction value corresponding to the audio data to be reproduced when it is determined that the normal play is performed. However, if it is determined that the normal play is performed instead, the volume level value of the output volume may not be corrected.

  In the present embodiment, the audio data of a song is used as an example of audio data. However, the present invention is not limited to this, and it goes without saying that other types of audio data can be used instead. . For example, audio data such as voice may be used as the audio data. In the present embodiment, audio data is handled by being compressed by encoding, but the present invention is not limited to this and may be handled as uncompressed data instead.

It is a block diagram which shows schematic structure of the audio | voice reproduction | regeneration / recording apparatus by an Example. It is a flowchart of the audio data recording process by an Example. The schematic diagram which shows the link of audio data and the 1st and 2nd volume correction value. It is a schematic diagram which shows identification information. It is a flowchart of the audio data reproduction | regeneration processing by an Example. It is a flowchart which shows the example of the calculation process of the 1st and 2nd volume correction value.

Explanation of symbols

8 ... Correction value reading unit 9 ... Operation unit 10 ... Audio source 11 ... Audio source reading unit 12 ... Volume correction value calculation unit 13 ... Encoder 14 ... Data writing unit DESCRIPTION OF SYMBOLS 15 ... Recording medium 16 ... Control part 17 ... Data reading part 18 ... Volume correction value setting part 19 ... Decoder 20 ... Volume correction part 21 ... Main volume 100 ... Audio playback / recording device 100a ... Audio recording device 100b ... Audio playback device

Claims (14)

First volume correction value calculating means for calculating a first volume correction value for audio data;
Second sound volume correction value calculating means for calculating a second sound volume correction value common to each group corresponding to an audio source for the audio data;
An audio recording apparatus comprising: a recording unit that links the first sound volume correction value and the second sound volume correction value and records the audio data on a recording medium. Means for recording the identification number of the group;
The second sound volume correction value calculating means, when audio data of a predetermined audio source is recorded on the recording medium, based on the identification number of the predetermined audio source and the identification number of the group. It is determined whether the audio data of the audio source is present on the recording medium. If it is determined that the audio data is not present, the first sound volume of the first audio data of the predetermined audio source is determined. The value of the correction value is the value of the second sound volume correction value for the first audio data,
2. The audio recording according to claim 1, wherein the recording unit records the first audio data on a recording medium by linking the first volume correction value and the second volume correction value. apparatus. When the second sound volume correction value calculating unit determines that the audio data of the predetermined audio source exists on the recording medium, the second sound volume correction value calculating unit corresponds to the predetermined audio source recorded on the recording medium. A value of the second volume correction value of the audio data of the group and a value of the second volume correction value of the second audio data recorded in addition to the recording medium of the predetermined audio source are shared. Value and
The recording means links the first volume correction value and the second volume correction value, which are set to a common value, to the second audio data, and records the second audio data on the recording medium. 3. The audio recording apparatus according to claim 2, wherein the second volume correction value, which is a common value, is recorded by linking the audio data of the group corresponding to the predetermined audio source that has been completed.   The second volume correction value calculation means obtains an average volume level value of the entire group corresponding to the audio source, and calculates a difference between the average volume level value and the volume level value of the output volume as the second volume correction value. The audio recording apparatus according to claim 1, wherein   The second volume correction value calculating means obtains an average of average volume levels for each of the audio data of the group corresponding to the audio source, and calculates a difference between the average and the volume level value of the output volume. The audio recording apparatus according to claim 1, wherein the audio recording apparatus is calculated as a volume correction value.   2. The second sound volume correction value calculating means calculates an average of the first sound volume correction values of the audio data of the group corresponding to the audio source as the second sound volume correction value. The audio recording device described in 1.   The second volume correction value calculating means calculates a minimum value of the first volume correction value of the audio data of the group corresponding to the audio source as the second volume correction value. 2. The audio recording device according to 1.   The second volume correction value calculating means includes a plurality of audio data in which the first volume correction value of the second audio data is included in a group corresponding to the predetermined audio source recorded on the recording medium. Is smaller than the second volume correction value common to the second audio data, the minimum first volume correction value of the second audio data is recorded in the second audio data and the recording medium. The audio recording apparatus according to claim 3, wherein the second volume correction value for the audio data of the group corresponding to the predetermined audio source that has already been used. A first volume correction value calculation method for calculating a first volume correction value for audio data;
A second volume correction value calculation method for calculating a second volume correction value common to each group corresponding to an audio source for the audio data;
An audio recording method comprising: recording the audio data on a recording medium by linking the first sound volume correction value and the second sound volume correction value. An audio recording program executed by a computer,
First volume correction value calculating means for calculating a first volume correction value for audio data, and a second volume correction value for calculating a second volume correction value common to each group corresponding to an audio source for the audio data. An audio recording program that causes the computer to function as a calculation unit and a recording unit that links the first volume correction value and the second volume correction value and records the audio data on a recording medium. An audio playback device for playing back audio data from a recording medium in which a first volume correction value and a second volume correction value common to each group corresponding to an audio source are recorded for audio data,
Input means for inputting a playback mode of the audio data;
When it is determined that the audio data of the group is played back randomly based on the input playback mode, the volume level value of the output volume is automatically corrected using the first volume correction value. Performing volume correction means for automatically correcting the volume level value of the output volume using the second volume correction value when it is determined that the audio data of the group is reproduced in order; An audio playback apparatus comprising: An audio reproduction method for reproducing audio data from a recording medium in which a first volume correction value and a second volume correction value common to a group for each audio source are recorded for audio data,
An input method for inputting a playback mode of the audio data;
When it is determined that the audio data of the group is played back randomly based on the input playback mode, the volume level value of the output volume is automatically corrected using the first volume correction value. And a volume correction method for automatically correcting the volume level value of the output volume using the second volume correction value when it is determined that the audio data of the group is played in order, An audio playback method comprising: An audio reproduction program executed by a computer for reproducing audio data from a recording medium in which a first sound volume correction value and a second sound volume correction value common to a group for each audio source are recorded. There,
When it is determined that the audio data of the group is played back at random based on the input means for inputting the playback mode of the audio data and the input playback mode, the first volume correction value is set to The volume level value of the output volume is automatically corrected, and if it is determined that the audio data of the group is reproduced in order, the volume level of the output volume is determined using the second volume correction value. An audio reproduction program that causes the computer to function as volume correction means for automatically correcting a level value.   A recording medium on which the audio reproduction program according to claim 13 is recorded.

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