JP4601095B2 - Playback device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to reproduction equipment for reproducing audio data.
[0002]
[Prior art]
Conventionally, sound input from a microphone is digitized, subjected to sound compression processing and recorded as a sound data file on a recording medium, and the sound data file recorded on the recording medium is read out and subjected to decompression processing. After that, various techniques relating to a digital recorder, which is a playback device that converts it into analog audio information and outputs it as audio from a speaker or the like, have been developed.
[0003]
In a digital recorder that is currently widely used, the compression rate is switched to a low compression standard play (hereinafter referred to as SP) mode or a high compression rate long play (hereinafter referred to as LP) mode in block units. Recording can be performed at any compression rate desired by the operator.
[0004]
This function is very effective from this point of view because important contents are recorded in SP mode, and if the commentary additional information part is recorded in the LP mode and recorded in the middle, the recording medium can be saved. It can be said that there is.
[0005]
[Problems to be solved by the invention]
However, in the conventional technology as described above, since playback is performed without distinguishing between SP mode and LP mode at the time of playback, even when only an important part is desired to be listened to, LP with low importance The part recorded in the mode has to be heard in the same manner as the part recorded in the SP mode, and the user is eager to reproduce these separately.
[0006]
The present invention has been made in view of the above problems, and an object of the present invention is to perform efficient reproduction desired by the user when a plurality of recording modes are mixed in the same file. It is to provide a possible playback equipment.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, it is possible to reproduce an audio file recorded on a memory card and mixed with audio data recorded in different recording modes in one audio file. In such a playback apparatus, the information about the recording mode stored in the block header of the audio file composed of a file header and a plurality of audio data each having a block header attached thereto is read and the first recording mode or the above It is determined whether the second recording mode has a higher compression rate than the first recording mode, and the audio data recorded in the first recording mode is reproduced at a normal speed and recorded in the second recording mode. In addition, a reproducing apparatus is provided that includes reproducing means for reproducing the audio data at a speed higher than the normal speed.
[0008]
In the second aspect, the audio data file divided into a plurality of blocks and capable of specifying the audio data compression rate in the block header of each block can be reproduced , and the reproduction device recorded on the memory card And reading the information on the compression rate stored in the header of the block and detecting the compression rate of the block, and the block at a speed corresponding to the compression rate detected by the compression rate detection unit. Reproduction means for reproducing the audio data of the audio data, wherein the reproduction means reproduces only the audio data of the block compressed at a predetermined compression rate in the audio data file, and the block associated with the audio data. Read the information about the recording mode stored in the header, reproduce only the audio data compressed at the predetermined compression rate, and When playing back the audio data of all blocks in the voice data file, the information about the recording mode stored in the block header attached to each audio data is read, and all the audio data is played back at a speed corresponding to the compression rate. A playback device is provided.
[0011]
According to the first and second aspects, the following effects are exhibited.
[0012]
That is, in the first aspect of the present invention, the audio data recorded in the first recording mode is reproduced at a normal speed by the reproducing means , and the audio data recorded in the second recording mode is faster than usual. Played at speed.
[0013]
In the second aspect, the audio data is reproduced by the reproducing means at a speed corresponding to the compression rate for each block.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0017]
First, FIG. 1 is a conceptual diagram showing a configuration of an audio processing system to which a playback apparatus according to an embodiment of the present invention is applied. Hereinafter, the configuration and operation will be described in detail.
[0018]
As shown in the figure, this sound processing system comprises a digital recorder 1 as a playback device, a miniature card 2, a PC card adapter 3, and a personal computer 4. Further, the personal computer 4 is connected with a display 5 for performing various displays, a keyboard 6 and a mouse 7 as operation members.
[0019]
In such a configuration, audio data recorded by the digital recorder 1 is recorded on the miniature card 2. The miniature card 2 is loaded into a PC card adapter 3 and connected to the personal computer 4 together with the PC card adapter 3, and voice is reproduced and information is displayed according to a sequence of a voice recognition program corresponding to a control program and a reproduction program. Is called.
[0020]
Here, FIG. 2 shows a detailed configuration around the personal computer 4.
That is, as shown in the figure, the CPU 31 that controls the entire control is connected to the internal recording medium 33, the external port 34, and the main memory 32 via the bus so as to be communicable with each other. Further, it is connected to the PC card slot 40 via the interface 39, connected to the display 5 via the interface 35, connected to the keyboard 6 and the mouse 7 as operation members via the interface 36, and the speaker 38 via the interface 37. Connected with. The control program and the voice recognition program are recorded in the internal recording medium 33 in advance. The reproduction means described in the claims corresponds to the CPU 31.
[0021]
In such a configuration, the CPU 31 receives the audio data recorded on the miniature card 2 via the PC card slot 40 and temporarily stores it in the main memory 32. Then, based on an instruction by the operator to operate the keyboard 6 or the mouse 7, an operation based on the control program recorded on the internal recording medium 33 and further the sequence of the voice recognition program is executed to perform a predetermined voice recognition process. . The text data recognized in this way is displayed on the display 5 as appropriate, and when desired, the text data is also output from the speaker 38.
[0022]
Here, FIG. 3 is a diagram showing an actual speech recognition processing screen (window).
[0023]
As shown in the figure, a desired process is instructed by operating the keyboard 6 and the mouse 7 on the voice recognition processing screen. In this example, a file “Welcome.dss” is read out, and the recording state is displayed at a position indicated by reference numeral 102. In this display 102, the portion 100 recorded in the LP mode, which is a recording mode in which the compression rate of the audio data is high and can be recorded for a long time, is displayed as shown by diagonal lines, and the audio data is displayed. The portion recorded in the SP mode, which is a recording mode with a low compression rate and high sound quality and capable of voice recognition processing, is displayed without hatching. Therefore, the recording state of each audio file can be easily visually confirmed.
[0024]
If the operator selects a desired one of A to D in the window 103, only the portion recorded in the SP mode, only the portion recorded in the LP mode, all playback, all playback, Playback (LP mode recording part is double speed playback) can be performed. That is, as shown in FIG. 3B, for example, when A (playback only for SP) is selected, playback is started from the beginning of the file and switched to the LP mode portion (timing 1). ▼), jumps to the end of LP mode (timing (2)), then plays back the SP mode recording part, and similarly jumps the LP mode recording part (between timings (3) to (4)) Will be played.
[0025]
In general, the portion recorded in the SP mode is often an important portion, and the portion recorded in the LP mode is often an unimportant portion such as an aside. In view of such circumstances, in this embodiment, if a desired one is selected, efficient reproduction such as shortening of reproduction time can be performed.
[0026]
Next, the structure of the DSS audio file will be described with reference to FIG.
[0027]
As shown in the figure, the DSS audio file includes a file header 200 and an audio file 201, and the audio data 201 includes a DSS block header 202 and audio data 203. In this embodiment, the DSS audio file can be recorded by switching the compression rate between the SP mode and the LP mode for each block, but the recording state of the SP / LP mode is recorded in the DSS block header 202. Is stored.
[0028]
Hereinafter, the operation of the audio reproduction system according to the embodiment will be described in detail.
[0029]
First, the basic operation of the speech recognition system to which the playback apparatus according to the embodiment is applied will be described with reference to the flowchart of FIG.
[0030]
When the operation is started, initial settings such as clearing of various variables are first performed (step S1). When a predetermined file is selected, various processes are performed based on selection / non-selection (steps S2 and S3). Proceed to the next Step S4.
[0031]
In step S4, when a button is clicked, each process is performed according to the button operation (steps S4 and S5). In this “respective processing”, for example, when “PLAY” is selected, the sequence shown in FIG. 6 to be described later is executed to reproduce the sound.
[0032]
Next, the playback operation sequence will be described with reference to the flowchart of FIG. Note that “PLAY MODE” described below means each of modes A to D selected in the window 103 of FIG.
[0033]
When this sequence is entered, the following processing according to PLAY MODE is performed.
[0034]
That is, when the A mode (SP only playback) is selected (step S11), the file header 200 of the DSS audio file is read, and only the SP mode recording portion is played back (steps S13 and S14). The above reproduction operation is repeated until it becomes (step S16). When the stop SW 104 is clicked during the above operation, the reproduction operation is immediately terminated (steps S15 and S17).
Next, when the B mode (only LP playback) is selected (step S18), the file header 200 of the DSS audio file is read, and only the LP mode recording portion is played back (steps S19 and S20), and the data end. The above reproduction operation is repeated until it becomes (step S23). If the stop SW 104 is clicked during the above operation, the reproduction operation is immediately terminated (steps S22 and S24).
[0035]
If the C mode (all playback) is selected (step S25), the file header 200 of the DSS audio file is read, all the data is played back (step S27), and the above playback is performed until the data end is reached. The operation is repeated (step S29). When the data end is reached, the operation is terminated. If the stop SW 104 is clicked during the above operation, the reproduction operation is immediately terminated (steps S28 and S30).
[0036]
On the other hand, when the D mode (LP double speed playback) is selected (step S31), the file header 200 of the DSS audio file is read, the SP mode recording part is played back at normal speed, and the LP mode recording part is played back at double speed. Reproduction is performed (steps S33 and S34), and the above operation is repeated until the data end is reached (step S36). When the data end is reached, the reproduction operation is terminated. If the stop SW 104 is clicked during the reproduction operation, the operation is immediately terminated (step S35).
[0037]
As described above, according to the present embodiment, it is possible to discriminate between the SP mode and the LP mode, and at least a desired recording portion can be reproduced at a desired speed. It will be.
[0038]
The embodiment of the present invention has been described above, but the present invention is not limited to this, and various improvements and changes can be made without departing from the spirit of the present invention. For example, in the above embodiment, a playback device that realizes playback according to four modes, that is, SP mode recording part only, LP mode recording part only, both LP mode recording part only and double speed playback, and a recording medium on which a playback program is recorded. However, it is needless to say that other modes can be provided.
[0039]
In this embodiment, the case where there are a plurality of types of compression ratios such as the SP mode and the LP mode has been described as an example of the recording mode. The present invention can be applied even when the compression methods such as “waveform coding method” and “hybrid method” are different. That is, only “analysis / synthesis coding system” (or “waveform coding system” or “hybrid system”) is reproduced. Various other patterns are conceivable, but are omitted here.
[0040]
In addition, the following invention is contained in the said embodiment of this invention.
[0041]
(1) In a playback apparatus capable of playing back a file in which data recorded at a plurality of different compression rates is mixed in one file,
A playback apparatus comprising playback means for playing back only data compressed at a predetermined compression rate.
[0042]
(2) In a playback apparatus capable of playing back a file in which data recorded at a plurality of different compression rates is mixed in one file,
Data compressed at the first compression rate is played back at a normal speed, and data compressed at the second compression rate is provided with a playback means capable of playing back at a speed faster than normal. A playback device.
[0043]
(3) The reproduction means reproduces the data compressed at the first compression rate at a normal speed, and the data compressed at the second compression rate, which is higher than the first compression rate. The reproduction apparatus according to (2), wherein reproduction is performed at a speed higher than usual.
[0044]
(4) In a playback apparatus capable of playing back a file in which data recorded at a plurality of different compression rates is mixed in one file,
A selection means for selecting whether to reproduce only a file compressed at a predetermined compression rate or to reproduce all data in the file;
And a data reproducing means for reproducing data based on the selection result of the selecting means.
[0045]
(5) Further, when the selection means selects to reproduce all of the data in the file, whether or not to reproduce the data portion compressed at a predetermined compression rate at a speed higher than the normal reproduction speed. The data reproducing apparatus according to (4) above, wherein the data can be selected.
[0046]
(6) In a playback apparatus capable of playing back an audio data file that is divided into a plurality of blocks and for which the compression rate of audio data can be specified for each block,
Compression rate detection means for reading the compression rate information in the header portion of the block and detecting the compression rate of the block;
Reproduction means for reproducing the block when the compression ratio detected by the compression ratio detection means is a predetermined compression ratio;
A playback apparatus comprising:
[0047]
(7) In a playback apparatus capable of playing back an audio data file that is divided into a plurality of blocks and for which the compression rate of audio data can be specified for each block.
Compression rate detection means for reading the compression rate information in the header portion of the block and detecting the compression rate of the block;
When the compression rate detected by the compression rate detection means is a predetermined compression rate, the audio data of the block is reproduced at a normal speed, and the detected compression rate is different from the predetermined compression rate. Is a reproducing means for reproducing the audio data of the block at a speed higher than usual;
A playback apparatus comprising:
[0048]
(8) In a playback device capable of playing back an audio data file divided into a plurality of blocks and having attribute information about the blocks for each block,
Reading means for reading the attribute information;
Setting means for setting whether to perform reproduction speed or reproduction of the block according to the attribute information read by the reading means;
Reproducing means for reproducing the block based on the setting of the setting means;
A playback apparatus comprising:
[0049]
(9) A recording medium that records a reproduction program capable of reproducing a file in which data recorded at a plurality of different compression rates in a single file is mixed by a computer,
A recording medium recording a reproduction program, wherein the reproduction program causes a computer to reproduce only data compressed at a predetermined compression rate.
[0050]
(10) A recording medium on which a reproduction program capable of reproducing a file in which data recorded at a plurality of different compression rates is mixed in one file by a computer,
The reproduction program causes the computer to reproduce data compressed at the first compression rate at a normal speed, and reproduces data compressed at the second compression rate at a speed higher than normal. A recording medium on which a reproduction program is recorded.
[0051]
(11) The reproduction program causes the computer to reproduce the data compressed at the first compression rate at a normal speed, and the second compression having a compression rate higher than the first compression rate. The recording medium recorded with the reproduction program according to (10), wherein the data compressed at a rate is reproduced at a speed higher than usual.
[0052]
(12) A recording medium on which a reproduction program capable of reproducing a file in which data recorded at a plurality of different compression rates is mixed in one file by a computer,
The reproduction program causes the computer to select whether to reproduce only a file compressed at a predetermined compression rate or to reproduce all data in the file, and reproduce the data based on the selection result. The recording medium which recorded the reproduction | regeneration program characterized by these.
[0053]
(13) When the program selects to reproduce all the data in the file, whether or not to reproduce the data portion compressed at a predetermined compression rate at a speed faster than the normal reproduction speed. 13. The recording medium on which the reproduction program according to claim 12 is recorded.
[0054]
(14) A recording medium on which a reproduction program capable of reproducing an audio data file that can be divided by a computer into a plurality of blocks and for which an audio data compression rate can be designated for each block is recorded,
The reproduction program causes the computer to read the compression rate information in the header portion of the block, detect the compression rate of the block, and reproduce the block when the compression rate is a predetermined compression rate A recording medium on which a reproduction program is recorded.
[0055]
(15) A recording medium on which a reproduction program capable of reproducing an audio data file that can be divided by a computer into a plurality of blocks and for which an audio data compression rate can be specified for each block is recorded,
The reproduction program causes the computer to read the compression rate information in the header portion of the block to detect the compression rate of the block, and when the compression rate is a predetermined compression rate, the normal speed The recording medium recorded with the reproduction program, wherein the audio data of the block is reproduced, and the audio data of the block is reproduced at a higher speed than usual when the compression rate is different from the predetermined compression rate .
[0056]
(16) In a recording medium recorded with a reproduction program capable of reproducing an audio data file divided into a plurality of blocks and having attribute information about the blocks for each block,
The reproduction program causes the computer to read the attribute information, set the reproduction speed or reproduction of the block according to the attribute information, and reproduce the block based on the setting. The recording medium which recorded the reproduction | regeneration program characterized by these.
[0057]
【The invention's effect】
As described above in detail, according to the present invention, in the case where the same file is a plurality of recording modes are mixed, the user provides a reproducing equipment capable of good reproduction efficiency to desired be able to.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a configuration of an audio processing system to which a playback apparatus according to an embodiment of the present invention is applied.
FIG. 2 is a diagram showing a detailed configuration around a personal computer 4;
FIG. 3 is a diagram showing an actual voice recognition processing screen (window).
FIG. 4 is a diagram showing the structure of a DSS audio file.
FIG. 5 is a flowchart showing a basic operation of the speech recognition system to which the playback device according to the embodiment is applied.
FIG. 6 is a flowchart illustrating a sequence of a reproduction operation.
[Explanation of symbols]
1 Digital Recorder 2 Miniature Card 3 PC Card Adapter 4 Personal Computer 5 Display 6 Keyboard 7 Mouse 8 Control Program 9 Voice Recognition Program

Claims (2)

In a playback apparatus capable of playing back an audio file in which audio data recorded in a different recording mode is recorded in a single audio file and recorded in a memory card ,
The information about the recording mode stored in the block header of an audio file composed of a file header and a plurality of audio data each having a block header attached thereto is read out and the first recording mode or the first recording mode is read out It is determined whether the second recording mode has a higher compression rate, audio data recorded in the first recording mode is reproduced at a normal speed, and audio data recorded in the second recording mode is A playback device comprising playback means for playback at a speed higher than a normal speed. Is divided into a plurality of blocks, it is possible to reproduce the audio data file can be specified for the compression ratio of voice data to the block header of each the block, the reproducing apparatus recorded in the memory card,
A compression rate detection means for reading the information about the compression rate stored in the header of the block and detecting the compression rate of the block;
Playback means for playing back the audio data of the block at a speed corresponding to the compression rate detected by the compression rate detection means;
Equipped with,
When reproducing only the audio data of the block compressed at a predetermined compression rate in the audio data file, the reproducing means reads information on the recording mode stored in the block header attached to the audio data, and When only audio data compressed at a predetermined compression rate is reproduced, and audio data of all blocks in the audio data file is reproduced, information on the recording mode stored in the block header attached to each audio data A playback apparatus that reads and plays back all audio data at a speed corresponding to a compression rate .

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