JPH0684585U - Digital audio recording / reproducing device - Google Patents

Abstract

(57) [Summary] [Structure] The audio signal from the microphone 1 and the unique code from one of the code generators 8 to 10 are mixed by the audio signal / code mixing device 3 and input to the recording / reproducing unit 4. Digital audio data is recorded in each main data area of the magnetic tape, and a unique code is recorded in each sub data area. When playing back only specific digital audio data, the playback condition designating device 5
The recording / reproducing unit 4 is caused to perform a reproducing operation or a high-speed search operation by instructing the unique code. A unique code is input to the code discriminator 6 from the recording / reproducing unit 4, and when the unique code matches the unique code instructed by the reproducing condition indicator 5, the recording / reproducing unit 4 performs a reproducing operation, If they do not match, the recording / reproducing unit 4 performs a high-speed search operation. [Effect] Only specific digital audio data can be selected and reproduced in a short time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a digital audio recording / reproducing device.

[0002]

[Prior art]

 In a digital audio tape recorder (DAT), the audio signal is recorded as digital audio data in the main data area of each track of the magnetic tape, so that high-quality recording and reproduction can be performed and the sub data area can be recorded. The data for identifying the digital audio data recorded in the main data area can be input, and this data has an advantage that the digital audio data recorded in the main data area can be easily searched. However, in the above-mentioned prior art, the time series data was input to the sub data area, but the data for identifying the contents was not input.

[0003]

[Problems to be solved by the device]

 Therefore, in the above-mentioned conventional method, for example, even after recording a statement at a meeting or a round-table discussion and then documenting only the statement of a specific speaker, it is not possible to reproduce only the statement of the specific speaker. In reality, the above-mentioned documentation work could not be performed efficiently in a short time. It is an object of the present invention to provide a digital audio recording / reproducing device that can solve the above problems.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the features of the present invention are as follows: (1) Digital audio data is recorded in each main data area of a recording medium and each sub-data area of the recording medium is , A recording operation for recording data for identifying the digital audio data recorded in each main data area, and (2) digital audio data recorded in each main data area and each sub data area. In a digital audio recording / reproducing apparatus capable of reproducing data and (3) high-speed search operation of reproducing data recorded in each sub data area at high speed, during recording operation of the recording / reproducing unit, A code that selectively generates a plurality of different unique codes and records them in each sub data area of the recording medium. Mode generator, a playback condition designating device for instructing a unique code during the playback operation of the recording / playback section and high-speed search operation, and a unique code played back during the playback operation and high-speed search operation of the recording / playback section. When the input unique code matches the unique code instructed by the reproduction condition instruction device, the recording / reproducing section is made to perform the reproducing operation. It has a code discriminating device for performing a search operation.

[0005]

[Action]

 When recording a speech at a meeting or a round-table discussion, a different unique code is generated from the code generator for each speaker. As a result, the recording / reproducing unit records the utterance of each speaker as digital audio data in each main data area of the recording medium, and records a unique code that differs for each speaker in each sub data area.

In the case of reproducing only the utterance of a specific speaker, the reproduction condition instructing device instructs a specific code corresponding to the specific speaker, and the recording / reproducing unit performs a reproducing operation or a high-speed search. Make an action. As a result, when the unique code is input from the recording / playback unit to the code discriminating device and the input unique code matches the unique code instructed by the playback condition instruction device, the recording / playback unit performs the playback operation. Is done. If they do not match, the recording / playback unit performs a high-speed search operation.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a digital audio tape recorder (DAT) as an example of a digital audio recording / reproducing apparatus, in which voice is input and an analog audio signal is output. It has a microphone 1, a code generator 2, an audio signal / code mixer 3, a recording / reproducing unit 4, a reproduction condition instructing device 5, a code discriminating device 6 and the like.

The code generator 2 selectively generates a plurality of different unique codes and the like, and includes three code generators 8 to 10. Each of the code generators 8 to 10 has recording switches 11 to 13 for causing the recording and reproducing unit 4 to perform a recording operation, and outputs a search code when the recording switches 11 to 13 are turned on. Specifically, in the embodiment, the search code is a two-digit numerical value, and includes a tens digit of the unique code and a tens digit of the number code. The code generator 8 outputs "0" as the unique code, the code generator 9 outputs "1" as the unique code, and the code generator 10 outputs "2" as the unique code. To do. In addition, the frequency code indicates the number of times of utterance, and its initial value is set to 1, and the frequency code is addressed to 1 each time the recording switches 11 to 13 of the code generators 8 to 10 are turned on. It increases sequentially. Although not shown, each of the code generators 8 to 10 is provided with a switch for returning the number code to 1.

The audio signal / code mixing device 3 converts an analog audio signal from the microphone 1 into a digital audio signal, and adds a search code from each code generator 8 to 10 to the digital audio signal. Output to the recording / playback unit 4. A magnetic tape is used as a recording medium of the recording / reproducing unit 4. Tracks are continuously formed on the magnetic tape obliquely with respect to the traveling direction. As shown in FIG. 2, each track consists of 196 blocks, and has 128 blocks of main data area in which digital audio data is recorded, and a pair of sub-data areas of 8 blocks before and after the main data area. And so on.

In the sub data area, the synchronization signal Sync, the identification code SW 1 and SW 2 called sub ID, the parity, and the sub data in which the time code and the like are recorded are arranged in the above order, and the even block And odd blocks. The even block of the identification code SW 1 is composed of a control ID of upper 4 bits and a data ID of lower 4 bits. The control ID includes a TOCID, a shortening ID, a start ID, a priority ID, and the like. The data ID is "0000", which is an audio format. Program numbers ID2 and ID3 are provided in the odd number blocks of the identification code SW1. A flag "1" indicating that this block is a sub data area is recorded in the MSB of the identification code SW2. A pack ID and a block address are provided in even-numbered blocks of the identification code SW2, and a program number ID1 and a block address are provided in odd-numbered blocks.

The recording / reproducing unit 4 (1) records the digital audio signal as digital audio data in the main data area of each track of the magnetic tape, and also writes the program numbers ID1 to ID3 in the sub-data area of each track. , A recording operation for recording data such as a search code, (2) a reproduction operation for reproducing the digital audio data recorded in each main data area and the data recorded in each sub data area, and (3) each sub It is possible to perform a high-speed search operation for reproducing the data recorded in the data area at a speed 200 to 300 times as high as that at the time of the reproducing operation, and other operations such as a rewinding operation that are usually performed by the conventional DAT.

The reproduction condition instructing device 5 is for instructing a unique code to selectively reproduce the digital audio data for each unique code, and has three instruction switches 14 to 16 corresponding to the code generators 8 to 10. Have. The code discriminator 6 is composed of a CPU, etc., and the reproduced unique code is inputted during the reproducing operation and the high-speed search operation of the recording / reproducing unit 4, and the inputted unique code is also reproduced. When it matches the unique code instructed by, the playback operation command is output to the recording / playback section 4, and when it does not match, the high speed search operation command is output to the recording / playback section 4.

According to the embodiment configured as described above, for example, in the case of recording the speech of the meeting or the roundtable discussion by three persons A, B, and C, when A speaks, the recording of the code generator 8 is performed. When the switch 11 or B speaks, the recording switch 12 of the chord generator 9 is turned on, and when the C speaks, the recording switch 13 of the chord generator 10 is turned on. Speak to. As a result, the code generators 8 to 10 whose recording switches 11 to 13 are turned on generate a search code, and the recording / reproducing unit starts the recording operation. Further, the analog audio signal from the microphone 1 and the search code from each of the code generators 8 to 10 are input to the audio signal / code mixing device 3 to convert the analog audio signal into a digital audio signal. A search code is added to this digital audio signal and is input to the recording / reproducing unit 4.

Then, each time the recording switches 11 to 13 of the code generators 8 to 10 are turned on, the number of times of each search code is sequentially increased. As described above, the recording / reproducing unit 4 records the respective utterances of the persons A to C as digital audio data in the main data area of each track of the magnetic tape, and at the same time, records them in the sub-data area. The unique code of the search code and the number of times code are recorded in the program numbers ID1 to ID3. That is, as shown in FIG. 3, when a conference or the like starts and A first speaks, for example, in tracks T1 to T3 of the magnetic tape, in the main data area M, according to the speaking time, In addition to recording the first utterance of A, "01" is recorded as a search code in the program numbers ID1 to ID3 of the sub data area S.

When C and B speak after A, in the same manner as above, according to the speech time, for example, in the tracks T4 to T7 next to the track T3 of the magnetic tape, the C is recorded in the main data area. Alternatively, the first utterance of B is recorded, and "21" or "11" is recorded as a search code in the program numbers ID1 to ID3 of the sub data area. Then, if B makes a second utterance next to B, in the track T8 in which this utterance is recorded, the search number "02" is set in the program numbers ID1 to ID3 of the sub data area. Will be recorded.

Then, when a particular speaker, for example, only A's speech is reproduced, the instruction switch 14 of the reproduction condition instructing device 5 is reproduced, and when only B is reproduced, the reproduction condition instructing device 5 is reproduced. In the case of reproducing the speech of only C by operating the instruction switch 15 of No. 3, the instruction switch 16 of the reproduction condition instructing device 5 is operated to instruct the unique code "0", "1", "2". . In this state, when the recording / reproducing unit 4 performs a reproducing operation or a high-speed search operation, the recording / reproducing unit 4 outputs a reproduction signal including a search code and inputs it to the code discriminating device 6.

When the unique code of the search code included in the input reproduction signal matches the unique code instructed by the reproduction condition instructing device 5, a reproduction operation command is issued from the code discriminating device 6 to the recording / reproducing unit. 4 and the recording / reproducing unit 4 performs a reproducing operation. If they do not match, the code discriminator 6 outputs a high-speed search operation command to the recording / reproducing unit 4, which causes the recording / reproducing unit 4 to search at a speed of 200 to 300 times as high as that during reproduction. Output the playback signal including the code. Then, again, when the unique code of the search code included in the reproduction signal input from the recording / reproducing unit 4 to the code discriminating device 6 and the unique code instructed by the reproducing condition instructing device 5 match, the code discriminating device 6 , A playback operation command is output, and the recording / playback unit 4 restarts the playback operation.

Therefore, only the utterance of a specific speaker corresponding to the unique code instructed by the instruction switches 14 to 16 of the reproduction condition instructing device 5 can be selected and reproduced in a short time. The work of documenting only a person's remarks can be performed efficiently in a short time. Although the number code is one digit in the embodiment, it may be two digits and the search code may be three digits. Although the present invention is applied to the DAT in the embodiment, the present invention is also applied to a disc player or the like for recording / reproducing operations on a magneto-optical disc such as a mini disc (MD). It is possible.

[0019]

[Effect of device]

 As described above, according to the present invention, at the time of reproduction, only specific digital audio data can be selected and reproduced in a short time. For example, only the utterance of a specific speaker such as a conference is reproduced and documented. Work can be done efficiently in a short time.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a diagram showing a data recording format of a magnetic tape.

FIG. 3 is an explanatory view showing an embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Microphone, 2 ... Code generator, 3 ... Audio signal / code mixing device, 4 ... Recording / reproducing part, 5 ... Reproduction condition instruction device, 6 ... Code discrimination device, 8-10 ... Code generator,
11-13 ... recording switch, 14-16 ... instruction switch.

Claims (1)

[Scope of utility model registration request] 1. A recording / reproducing unit (1) records digital audio data in each main data area of a recording medium, and records digital audio data in each main data area of each sub-data area of the recording medium. A recording operation of recording data for identifying (2) a reproduction operation of reproducing the digital audio data recorded in each main data area and the data recorded in each sub data area, and (3) each sub data In a digital audio recording / playback device capable of high-speed search operation for playing back data recorded in an area at high speed, a plurality of different unique codes are selectively generated during recording operation of the recording / playback section to record. A code generator to be recorded in each sub-data area of the medium, and a recording / reproducing section at the time of reproducing operation and A reproduction condition designating device for designating a unique code at the time of a search operation, and a reproduced unique code is inputted at the time of the reproducing operation of the recording / reproducing unit and at the time of high-speed search operation, and the inputted unique code is a reproduction condition designating device. And a code discriminator that causes the recording / reproducing unit to perform a high-speed search operation when the recording / reproducing unit performs a reproducing operation. Digital audio recording / reproducing device.