JP2009116938A - Reproducing device and reproduction control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce auditory difference of sound volume of voice data without promoting a user to perform complicated operation when a plurality of voice data are reproduced. <P>SOLUTION: A sound recording reproducing device 1 reproduces voice data with predetermined set sound volume V and has a sound volume adjusting switch 14 for adjusting the set sound volume. The device includes:storing a volume coefficient α prescribing the increase and the decrease of the sound volume during reproduction to the setting volume V for each of the plurality of voice data; changing the setting volume V on the basis of the sound volume coefficient α of this voice data and the set sound volume V, when the voice data are reproduced; and adjusting, when the set sound volume V is adjusted by the sound volume adjusting switch 14 while the voice data are reproduced, the value of the sound volume coefficient α corresponding to the voice data during reproduction in accordance with adjustment quantity D of the set sound volume V. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a playback apparatus and playback control method for playing back a plurality of audio data, and more particularly to a technique for suppressing variation in volume between audio data when playing back a plurality of audio data.

  In recent years, playback with a built-in relatively large capacity storage device such as an HDD, and a function for recording and playing back audio data of music recorded on a recording medium such as a CD or DVD in a storage device such as an HDD. The device is widely known. This type of playback device uses a function (so-called playlist creation function) for rearranging previously recorded music in the order desired by the user (so-called playlist creation function), and an operator such as a volume control switch for the volume of the music to be played. Some of them are equipped with a function that can be adjusted to a value desired by the user.

  By the way, for example, when the music A recorded on the recording medium K1 and the music B recorded on another recording medium K2 are recorded on the HDD and reproduced based on the same set volume, the recording medium K1 is recorded. The audible volume may greatly differ between the music A and the music B due to reasons such as the generation date and type of K2 being different. In this case, when the music A and the music B are continuously played using the playlist creation function, if the user adjusts the volume with respect to the music A, it seems that the volume suddenly changes when the music B is played. The user is forced to perform a volume adjustment operation again in accordance with the music B.

Therefore, in recent years, a reproducing apparatus having a function of analyzing sound data with a predetermined algorithm and automatically adjusting a volume during recording or reproduction has been proposed. However, the present situation is that the volume cannot be completely adjusted for the audio data of all the music pieces even with such a function. In addition, a playback device is also known in which the volume can be manually set directly for each song during recording, but there is a problem that the setting operation is complicated and difficult to use.
On the other hand, recently, the volume level at the time of reproduction is stored in association with each audio data, and the next time the audio data is reproduced, it is reproduced at the same volume level as at the time of the previous reproduction. The technique made to do is proposed (for example, refer patent document 1).
JP 2006-129223 A

  However, if the configuration is such that the volume level at the time of playback is stored in association with each audio data, for example, a song is accidentally received while the song A is being played back, or the song has a conversation with a passenger, etc. If the playback volume is greatly reduced only during the playback of A, there is a problem that when the music A is played next time, the state in which the volume is reduced is reproduced and played at an extremely low volume. As a result, in particular, when a plurality of songs are sequentially played using the playlist creation function as described above, the volume is extremely reduced only when the song A is played. An operation to increase the size is required.

  The present invention has been made in view of the above-described circumstances. When reproducing a plurality of audio data, the user is not forced to perform a complicated operation, and the volume of the audible sound during reproduction between the audio data is reduced. It is an object of the present invention to provide a playback device and a playback control method that can reduce variations.

  In order to achieve the above object, the present invention reproduces audio data at a preset set volume, and has a volume control operator for adjusting the set volume, and a plurality of the audio data And a storage means for storing a volume coefficient for defining an increase / decrease in volume during playback with respect to the set volume, and the set volume is changed based on the volume coefficient of the audio data and the set volume during playback of the audio data. And when the set volume is adjusted by the volume adjustment operator when the audio data is being reproduced, a value of a volume coefficient corresponding to the audio data being reproduced is set to the set volume. It is characterized by adjusting according to the adjustment amount.

  Further, the present invention is characterized in that, in the above playback device, the value of the volume coefficient is adjusted so that the amount of change in the volume coefficient is smaller than the amount of change in volume during playback by adjusting the set volume. .

  In the playback apparatus, when the set volume is V, the set volume adjustment amount is D, the volume coefficient is α, the volume coefficient adjustment amount is d, and the constant is X, d = D / X and D / V> d / α is satisfied.

  Further, in order to achieve the above object, the present invention provides a playback control method for a playback apparatus that plays back audio data at a preset set volume and that can adjust the set volume by operating a volume control operator. For each of the plurality of audio data, a volume coefficient that prescribes an increase / decrease in volume during playback with respect to the set volume is stored in advance, and the setting is performed based on the volume coefficient of the audio data and the set volume when reproducing the audio data When the volume is changed and the set volume is adjusted by the volume adjustment operator when the audio data is being played back, the volume coefficient value corresponding to the audio data being played back is set to the adjustment amount of the set volume. It adjusts according to.

According to the present invention, for each of a plurality of audio data, a volume coefficient that regulates increase / decrease of the volume during playback relative to the set volume is stored, and is set based on the volume coefficient of the audio data and the set volume when the audio data is played back Since the volume is changed, the volume at the time of reproduction of the audio data is increased or decreased according to the volume coefficient with reference to the set volume. Thereby, compared with the structure which memorize | stores the last sound volume independently for every audio | voice data, when the several audio | voice data are reproduced | regenerated continuously, the dispersion | variation in the sound volume on hearing can be suppressed.
Furthermore, when the set volume is adjusted by the volume adjustment operator while the audio data is being played, the volume coefficient corresponding to the audio data being played is adjusted according to the amount of adjustment of the set volume. The volume that the user feels preferable can be reflected in the volume coefficient.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a functional configuration of a recording / reproducing apparatus 1 according to the present embodiment. The recording / playback apparatus 1 is configured as an in-vehicle apparatus mounted on a vehicle such as an automobile, and as shown in the figure, a control microcomputer 2, a CD player 4, a DSP (Digital Signal Processor) 6, a speaker, and the like. 8, a hard disk drive (HDD) 10, a key / display device 12, and a volume control switch 14.
The control microcomputer 2 functions as a control unit that centrally controls each unit of the recording / playback apparatus 1.
The CD player 4 reads and outputs music data from a CD (or other recording media such as a DVD) on which one or more music data as one aspect of audio data is recorded. The CD player 4 is connected to the control microcomputer 2 via a CD control / audio data bus 16, and the music data read from the CD is controlled via the CD control / audio data bus 16 under the control of the control microcomputer 2. To the control microcomputer 2.

The DSP 6 is a processor having a function of generating an analog audio signal based on music data and outputting the analog audio signal to the speaker 8 and performing various acoustic processing such as equalization processing and reproduction volume adjustment processing when generating the analog audio signal. The DSP 6 is connected to the control microcomputer 2 via the DSP control / audio data bus 18. Under the control of the control microcomputer 2, the DSP 6 receives music data via the DSP control / audio data bus 18 and performs various acoustic processing. The generated analog audio signal is generated and output to the speaker 8.
The speaker 8 is installed in the vehicle interior of the vehicle and emits sound based on the analog audio signal into the vehicle interior. Although only one speaker 8 is shown in the figure, a plurality of speakers 8 may be used to perform multi-channel reproduction.

The HDD 10 is a storage device that stores a large amount of music data by storing music data recorded on a CD. The HDD 10 is connected to the control microcomputer 2 via the HDD control / audio data bus 20 and operates under the control of the control microcomputer 2.
Specifically, the HDD 10 receives and stores music data read from the CD from the control microcomputer 2 via the HDD control / audio data bus 20 during recording of the CD, and is instructed by the control microcomputer 2 during playback. The music data is output to the control microcomputer 2 via the HDD control / audio data bus 20. Then, when the control microcomputer 2 outputs the music data received from the HDD 10 to the DSP 6, the music data stored in the HDD 10 is reproduced.
The management of each piece of music data can be uniquely identified and managed based on the label information when recording from a CD, and even when there is no label information, it is uniquely identified by the date and time when it was recorded for the first time. Can be identified and managed.

  The key / display device 12 has a plurality of operation keys and a display panel such as a liquid crystal panel, and functions as an operation unit and a display unit. The key / display device 12 includes the volume adjustment switch 14 as an operation key for adjusting the set volume. This key / display device 12 is connected to the control microcomputer 2 via a key / display control bus 22, and outputs a user operation to an operation key such as a volume control switch 14 to the control microcomputer 2. Under the control of No. 2, various information such as the title and volume of the music being played are displayed on the display panel.

In addition, the recording / playback apparatus 1 of the present embodiment has a function for reducing a volume difference in audibility for each piece of music when the music data stored in the HDD 10 is played back. A coefficient database 30, a volume change unit 32, and a volume coefficient adjustment unit 34 are provided.
The volume coefficient database 30 is stored in the HDD 10 and records the volume coefficient α for each piece of music data. The volume coefficient α prescribes an increase / decrease in volume during playback with respect to the set volume V set in the recording / playback apparatus 1, and the initial value is set to “1”.

When the music data stored in the HDD 10 is reproduced, the volume changing unit 32 reads the volume coefficient α corresponding to the music data from the volume coefficient database 30 and based on the volume coefficient α, the current set volume Is set in the DSP 6.
Specifically, when the current set volume is V, the volume changing unit 32 changes the current set volume V to a value of V × α and sets it in the DSP 6.
As a result, when the volume coefficient α is smaller than “1”, the music data is reproduced at a volume smaller than the current set volume V. On the contrary, when the volume coefficient α is larger than “1”, the music data is larger. It will be played at the volume.

The volume coefficient adjustment unit 34 adjusts the value of the volume coefficient α corresponding to the music data of the music being played according to the set volume adjustment amount when the user performs a volume adjustment operation during music playback. To do.
Specifically, when the volume adjustment amount by the volume adjustment operation is D and the volume coefficient α adjustment amount associated therewith is d, the volume coefficient adjustment unit 34 sets the volume coefficient adjustment amount d = D / X (however, , X are constants), and if the volume adjustment operation is a volume up operation, the adjustment amount d is added to the volume coefficient α, and conversely, if the volume adjustment operation is a volume down operation, the volume coefficient The adjustment amount d is subtracted from α.
As a result, every time the volume adjustment operation is performed, the operation is reflected in the volume coefficient α.

  Here, the constant X is set to a value (that is, X = 100) such that the adjustment amount d of the volume coefficient α is a minute amount, for example, about 1/100 of the adjustment amount D of the set volume. Thereby, even when the user adjusts the set volume V to be extremely large or small during the reproduction of the music, the change amount of the volume coefficient α is larger than the change amount (= D / V) of the volume due to this adjustment. (= D / α) can be kept small. Therefore, even if the same music is reproduced next time, it is reproduced at the extreme volume at the time of the previous reproduction, and the user is not uncomfortable.

Next, as an operation of the present embodiment, an operation at the time of reproducing the music piece A stored in the HDD 10 will be described with reference to FIG.
As shown in the figure, when the reproduction instruction of the music A is instructed by the user, the control microcomputer 2 sets the set volume V when reproducing the music A to the DSP 6 and then starts the reproduction of the music A. (Step S1). More specifically, the control microcomputer 2 sets the set volume V to a value (= V × α) obtained by multiplying the current set volume V of the recording / playback apparatus 1 by a volume coefficient α corresponding to the song data of the song A. Is changed to DSP6.
As a result, the current set volume V is corrected with the volume coefficient α corresponding to the music A, and the music A is reproduced with the corrected set volume V × α.

  Next, the control microcomputer 2 determines whether or not there is an operation on the volume adjustment switch 14 (step S2). When there is no operation on the volume adjustment switch 14 (step S2: NO), the music piece A is still being reproduced. In this case (step S3: YES), the processing procedure is returned to step S1, and when the reproduction of the music piece A has been completed (step S3: NO), the processing is ended.

When the operation is performed on the volume adjustment switch 14 during the reproduction of the music piece A (step S2: YES), the control microcomputer 2 determines the operation content of the volume adjustment switch 14 (step S4), and the operation content. Accordingly, the current set volume V and the volume coefficient α of the music piece A are adjusted as follows.
That is, when the operation content for the volume adjustment switch 14 is an operation for instructing “increase the volume”, the control microcomputer 2 adds the adjustment amount D of the set volume V instructed by the operation to the current set volume V. At the same time, the adjustment amount d of the volume coefficient α is added to the current volume coefficient α (step S5).
On the contrary, when the operation content for the volume adjustment switch 14 is an operation for instructing “decrease the volume”, the control microcomputer 2 sets the adjustment amount D of the set volume V instructed by the operation as the current set volume. While subtracting from V, the adjustment amount d of the volume coefficient α is subtracted from the current volume coefficient α (step S6).
When the set volume V is adjusted in this way, the adjusted set volume V is quickly set in the DSP 6 and the volume of the music A being reproduced is changed.
The adjusted volume coefficient α is stored in the HDD 10 in association with the music data of the music A.

Thereafter, the control microcomputer 2 returns the processing procedure to step S1 when the music piece A is still being reproduced (step S3: YES), and when the reproduction of the music piece A is finished (step S3: NO), the process is terminated.
As a result, when the music A is reproduced next time, the set volume V is corrected by the volume coefficient α reflecting the user's volume adjustment operation, and the reproduction is started. Will be played.
During reproduction of the music piece A, the volume coefficient α of the music piece A is increased or decreased by a minute amount d every time the volume adjustment operation is performed, and the volume coefficient α is increased in one volume adjustment operation. Although the sound volume does not change, the sound volume adjustment operation is performed many times, so that the sound volume coefficient α is optimized to a value at which the sound volume preferred by the user can be obtained.

  When the music stored in the HDD 10 is reproduced, the volume coefficient α adjustment process as described above is performed every time the music is reproduced, and the volume coefficient α is adjusted for each music.

  As described above, according to the present embodiment, for each of a plurality of pieces of music data, the volume coefficient α that defines the increase / decrease of the volume during playback with respect to the set volume V is stored, and when the music data is played back, Since the set volume V is changed based on the volume coefficient α and the current set volume V, the volume at the time of reproduction of each piece of music data is increased or decreased according to the volume coefficient α on the basis of the set volume V. As a result, when a plurality of music data is played back continuously using a playlist function or the like, compared to the conventional configuration in which the previous volume level is stored independently for each music data, between each music data It is possible to suppress variations in the volume of hearing.

  Further, when the set volume V is adjusted by the volume adjustment switch 14 during the reproduction of the music, the volume coefficient α corresponding to the music being reproduced is adjusted according to the adjustment amount D of the set volume V. Can be reflected in the volume coefficient α.

According to the present embodiment, the set volume is V, the set volume V is adjusted by operating the volume control switch D, the volume is adjusted by α, the volume coefficient is α, the volume is adjusted by d, and the constant is X. In case,
d = D / X and D / V> d / α
By adjusting the volume coefficient α so as to satisfy the above condition, the change amount of the volume coefficient α is made smaller than the change amount of the volume during reproduction by adjusting the set volume V.
With this configuration, for example, even when an operation for extremely reducing the set volume V is performed due to, for example, an incoming call during music playback, the volume coefficient α is greatly adjusted by the extreme volume change. There is no. As a result, when the same music is played next time, it is prevented that the music is played at an extreme volume that causes discomfort to the user.

  Also, over the long term, if a song is recorded with a low sound, the volume adjustment operation to increase the volume during playback of the song is more effective than when playing a song recorded with a loud sound. Since many of these volume adjustment operations should be performed, a volume coefficient α reflecting the volume that the user feels favorable is obtained for each piece of music, and the difference in audible volume between songs is gradually increased. It will be suppressed.

  In other words, according to the present embodiment, during music playback, while maintaining the function of temporarily changing the volume greatly according to the user's wish, the volume that gives discomfort when the same music is played next time The volume coefficient α of the music is gradually optimized with the volume that the user feels preferable while the music is played many times without being played.

In addition, embodiment mentioned above shows the one aspect | mode of this invention to the last, A deformation | transformation and application are arbitrarily possible within the scope of the present invention.
For example, in the above-described embodiment, the configuration in which the music data is stored in the HDD 10 is illustrated. However, the present invention is not limited to this, and another storage device such as a flash memory may be used.
Further, in the above-described embodiment, the configuration is not limited to reading and recording music data from the CD player 4, but may be a configuration in which an audio file downloaded from a network such as the Internet is held in a storage device such as the HDD 10 and reproduced.
Further, in the above-described embodiment, the recording / reproducing apparatus as the in-vehicle device is exemplified, but the present invention is not limited thereto, and a portable or stationary audio apparatus may be used.

  Further, the volume coefficient α is stored for each broadcast channel (for example, channel number), and the volume coefficient α of the currently viewed broadcast channel is sequentially adjusted according to the user's volume adjustment operation. The present invention can be applied to reduce the volume difference between broadcast channels in analog radio and digital radio broadcasts.

The block diagram which shows the functional structure of the recording / reproducing apparatus which concerns on embodiment of this invention. The flowchart which shows music reproduction operation | movement.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Recording / reproducing apparatus 2 Control microcomputer 10 HDD (memory | storage means)
14 Volume control switch (Volume control)
30 Volume coefficient database 32 Volume change section 34 Volume coefficient adjustment section V Setting volume D Adjusted volume adjustment volume α Volume coefficient d Volume volume adjustment volume

Claims (4)

In a playback device that plays back audio data at a preset volume and has a volume control operator for adjusting the set volume,
Storage means for storing a volume coefficient that regulates increase / decrease in volume during playback with respect to the set volume for each of the plurality of audio data;
A volume changing means for changing the set volume based on the volume coefficient of the audio data and the set volume at the time of reproducing the audio data;
When the set volume is adjusted by the volume adjustment operator while the audio data is being reproduced, the value of the volume coefficient corresponding to the audio data being reproduced is adjusted according to the adjustment amount of the set volume. A reproducing apparatus characterized by that. The playback device according to claim 1,
A playback apparatus, wherein the value of the volume coefficient is adjusted so that the amount of change in the volume coefficient is smaller than the amount of change in volume during playback by adjusting the set volume. The playback device according to claim 2,
When the set volume is V, the set volume adjustment amount is D, the volume coefficient is α, the volume coefficient adjustment amount is d, and the constant is X,
d = D / X and D / V> d / α
A playback device characterized by satisfying the above. In a playback control method for a playback device that plays back audio data at a preset volume and that can be adjusted by operating a volume control operator.
For each of the plurality of audio data, a volume coefficient that prescribes an increase / decrease in volume during playback relative to the set volume is stored in advance.
When reproducing the audio data, the set volume is changed based on the volume coefficient of the audio data and the set volume,
When the set volume is adjusted by the volume adjustment operator while the audio data is being reproduced, the value of the volume coefficient corresponding to the audio data being reproduced is adjusted according to the adjustment amount of the set volume. The reproduction | regeneration control method characterized by the above-mentioned.

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