JPH076510A - Digital signal recording and reproducing device - Google Patents

Abstract

PURPOSE:To increase the recording amt. of a main data part to be a sound part which can be recorded on a recording medium by evading recording a silent main data part on the recording medium, reading only the main data part to be the sound part in turn from a memory and recording the data on the recording medium. CONSTITUTION:The memory 3 is provided to be written with the main data part for the purpose of signal processing on the main data part where an analog signal of an audio signal, etc., is digitized. A subcode P detecting means 5 is provided for the purpose of detecting the silent main data part corresponding to a silent part of the analog signal from an auxiliary code part. A stopping means 9 is provided for the purpose of stopping reading the silent main data part from the memory 3 based on a signal from the subcode P detecting means 5. A control microcomputer 6 is provided for the purpose of recording the main data part read out of the memory 3 onto the recording medium.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital signal recording / reproducing device having a memory function such as a magneto-optical disk device.

[0002]

2. Description of the Related Art Conventionally, in a magneto-optical disk apparatus as a digital signal recording / reproducing apparatus, audio data as a main data section in which an analog signal such as an audio signal is digitized and the search of the main data section are speeded up. It is recorded together with the subcode for doing. As a signal format for recording such audio data and subcode on the magneto-optical disk, a recording frame including a frame synchronization pattern, subcode, data and parity is formed.

The frame synchronization pattern is a bit for finding the beginning of each frame, and the parity is a code for error correction. Further, a data block is formed by collecting a predetermined number of the frames, and information for realizing various functions described later is written in the subcode of the data block.

The sub-code is used for a cue function of a song, a program function for playing each song according to a preset order, and a function for displaying contents such as a song name. "1" indicates a silent portion (Pause) between music pieces, which indicates a level value less than a predetermined value, and "0" when the signaled portion such as a music piece has a predetermined value or more. P channel (hereinafter referred to as subcode P) indicated by, and a Q channel indicating a track number indicating the order of each song, an index indicating a section number in the song, and the like.

Further, in the magneto-optical disk apparatus as described above, as input terminals, for example, a stereo minijack which is a line-in into which an analog signal which is an audio signal from an analog cassette tape is input, and a digital signal is recorded. An optical input connector, which is an optical digital input to which a digital signal from a compact disk or the like is directly input, is provided in order to prevent deterioration of the recording signal when transferring the recording signal.

[0006] The digital signal includes audio data indicating each song and an auxiliary code portion for speeding up the search of the main data portion thereof, and the auxiliary code portion includes the sub code. A subcode P ′ having the same function as P is included.

Next, the recording method of the magneto-optical disk device will be described. First, when the digital signal is recorded, the main data portion which is signal-processed so that audio data for each song can be recorded on the magneto-optical disk. And is recorded on the magneto-optical disk. At this time, the silent portion (Pause) between the music pieces is also recorded in a state where the corresponding main data portion is less than the predetermined level value, that is, the zero level value.

At this time, the auxiliary code portion coded in the digital signal is detected together with the main data portion, the sub-code P'is detected from the auxiliary code portion, and the track number indicating the order of each song is set as described above. Each is recorded by the subcode P '.

Further, when the analog signal from the line-in is recorded, the auxiliary code portion including the sub-code P'indicating the interval between the songs as described above is not included in the analog signal. The analog signal is A / D converted and recorded as it is as a continuous tune without switching the track number. Therefore, when the analog signal is recorded, the silent portions between the songs are also recorded.

[0010]

However, in the above-mentioned conventional configuration, when a digital signal such as a compact disc is recorded, the elapsed time between songs is unknown, so that the main part including the silent portion between songs is also included. Even when the data is recorded as an analog signal and the analog signal is recorded, the silent time between songs is also recorded as the main data because the elapsed time between songs is unknown.

Therefore, in the above structure, since the main data portion of each song and the silent main data portion indicating a silent portion between each song are recorded in the recording space preset in the magneto-optical disk, unnecessary silence is recorded. This causes a problem that the required main data recording space is reduced by the amount corresponding to the main data portion.

SUMMARY OF THE INVENTION An object of the present invention is to provide a digital signal recording / reproducing apparatus capable of removing unnecessary silent main data portion between tracks and recording, and expanding the recording space of the necessary main data portion. .

[0013]

In order to solve the above-mentioned problems, a digital signal recording / reproducing apparatus according to a first aspect of the present invention includes a main data section in which an analog signal such as an audio signal is digitized, and An auxiliary code part indicating a silent main data part, which is a main data part corresponding to a silent part of an analog signal, is input, a memory in which the main data part is written is provided, and the main data part read from the memory is In a digital signal recording / reproducing apparatus in which a signal-processed processed data portion and a subcode are sequentially recorded and reproduced on a recording medium in a predetermined signal format, a detection means for detecting the auxiliary code portion is provided, and the detection means Stop means for stopping the reading of the silent main data portion from the memory on the basis of the above signal.

A digital signal recording / reproducing apparatus according to a second aspect of the present invention is provided with a memory in which an analog signal such as an audio signal is converted into a main data portion which is a digital signal, and the main data portion is written. In a digital signal recording / reproducing apparatus in which a processed data part obtained by signal-processing the main data part read from a sub-code and a sub-code are sequentially recorded and reproduced in a recording medium in a predetermined signal format, the analog data is reproduced from the main data part. When the level value corresponding to the reproduction level of the signal is detected and the level value is equal to or less than the predetermined value for a predetermined time, a judgment means for judging the period as a silent main data portion is provided, and the judgment means A stop means for stopping the reading of the silent main data portion from the memory based on the signal There.

A digital signal recording / reproducing apparatus according to a third aspect of the present invention is the digital signal recording / reproducing apparatus according to the first or second aspect, in which a main data section and a next main data section are generated based on a signal from the stopping means. There is provided a signal adding means for adding the inter-track information indicating that there is a silent main data portion between the sub-codes recorded together with the main data portion corresponding to the silent main data portion and recording the information on the recording medium. Provided with a detection means for detecting the inter-track information from the sub-code when the recording medium is reproduced, based on the signal from the detection means,
When the inter-track information is detected, a generation means is provided for generating a silent main data portion whose level value is less than a predetermined value at a predetermined time interval, and outputting after the main data portion. It has a feature.

[0016]

According to the structure described in claim 1, the reading of the silent main data portion of the main data portion written in the memory from the memory is stopped by the signal from the detecting means which detects the auxiliary code portion. It can be stopped by means.

With this configuration, in the above configuration, the reading of the silent main data portion from the memory can be stopped, and only the main data portion that becomes the voiced portion can be sequentially read from the memory and recorded in the recording medium. Only the main data part can be densely recorded on the recording medium.

According to the structure of the second aspect, when it is detected that the level value of the main data portion corresponding to the reproduction level of the analog signal is equal to or less than the predetermined value for the predetermined time, the period is changed. It is determined by the determining means that it is in the interval, and based on the signal from the determining means, the stopping means can stop the reading of the silent main data portion, which is the main data portion corresponding to the music piece, from the memory.

As a result, in the above configuration, the reading of the silent main data portion from the memory can be stopped, and only the main data portion that becomes the voiced portion can be sequentially read from the memory and recorded in the recording medium. Only the main data part can be densely recorded on the recording medium.

According to the third aspect of the invention, the signal adding means adds the inter-track information to the sub-code corresponding to the main data section adjacent to the silent main data section and records it. When the inter-track information is detected by the detecting means when the recording medium is reproduced, the position of the unrecorded silent main data portion can be identified by the inter-track information.

As a result, when the inter-track information is detected, the generating means can restore and output the silent main data part which becomes a silent part following the main data part and is output. It is possible to form and output a silent part between one part and the next main data part.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The following will describe one embodiment of the present invention with reference to FIGS. In a magneto-optical disk device as a digital signal recording / reproducing device, audio data as a main data part in which an analog signal such as an audio signal is digitized, and the speed of retrieval of the audio data and list information are recorded. It is designed to be recorded together with the subcode.

As described above, as a signal format for recording the audio data and the subcode on the magneto-optical disk as a recording medium, a data frame composed of a frame synchronization pattern, a subcode, audio data and a parity is formed and used. ing.

The frame synchronization pattern is a bit for finding the beginning of each frame, and the parity is a code for error correction. Further, a data block is formed by collecting a predetermined number of the frames, and information for realizing various functions described later is written in the subcode of the data block.

That is, the sub-code is for a cue function of a song, a program function for playing each song according to a preset order, and a function for displaying contents such as a song name. Pause is indicated by "1" and P is indicated by "0" at the time of a song (hereinafter referred to as subcode P), track number indicating the song number, and index indicating the section number within the song. Etc. are included.

Further, in the magneto-optical disk device, a digital signal input terminal to which a digital signal from a compact disk or the like is input and an analog signal input terminal to which an analog signal such as an analog cassette tape output is input. Are provided, and both the digital signal and the analog signal are recorded and reproduced on the magneto-optical disk.

Next, a system for inputting and recording a digital signal will be described. First, as shown in FIG. 1, a digital signal input terminal 1 is provided, and the digital signal includes audio data and An auxiliary code part for speeding up the search of the audio data is included, and the auxiliary code part includes a subcode P ′ having the same function as the subcode P.

Therefore, in order to record such a digital signal, there is provided a sub-code separating means 2 for separating the audio data and the auxiliary code portion from the digital signal input from the digital signal input terminal 1.

A RAM (Random A) as a memory to which the audio data from the sub-code separating means 2 is input.
ccess Memory) 3 is provided. In the RAM 3, the audio data input from the subcode separating means 2 is written together with its address information. Therefore, R for generating the address information and inputting it to the RAM 3
An AM address counter 4 is provided.

On the other hand, there is provided a sub-code P detecting means 5 for detecting the sub-code P'from the auxiliary code part when the separated auxiliary code part is inputted. A control microcomputer 6 is provided to which the detection result of the subcode P ′ is input from the subcode P detection means 5. Further, the control microcomputer 6 controls the recording / reproducing system.

A compression LSI 7 is also provided to read and input each audio data written in the RAM 3. In the compression LSI 7, for example, ATR
The audio data is compressed to about 1/5 by the AC (Adaptive TRansform Acoustic Coding) method.

The compressed data, which is the audio data compressed in this way, is input to the RAM 3 and once written to the RAM 3 together with the address information of the compressed data. The compressed data written in the RAM 3 in this way is read from the RAM 3 as necessary and is converted into a recording format by an encoder 8
Entered in.

In the encoder 8, an error correction method for a digital signal to be recorded, for example, ACIRC (Advanced Cross Interleave Reed-solomon) is applied to compressed data.
Code) method gives an error correction code.
Modulation for recording on a magneto-optical disk (not shown),
For example, it is modulated by an EFM (Eight to Fourteen Modulation) method and output as an EFM signal.

The EFM signal is recorded on the magneto-optical disk by an optical pickup and a recording head (not shown). At this time, the control microcomputer 6 also controls the rotation of the magneto-optical disk (not shown).

Then, in the control microcomputer 6, the R
Stopping means 9 for stopping the reading of predetermined audio data of the AM3 and omitting the recording of the audio data.
And a signal adding means 10 for controlling the encoder 8 so as to give the EFM signal a subcode indicating the stop of the reading of the audio data, and when the recorded EFM signal is reproduced by omitting the predetermined audio data. Is provided with a generating means 11 for restoring the audio data.

The stopping means 9 determines that the subcode P'is "1" based on the signal from the subcode P detecting means 5.
Each address information of the audio data written in the RAM 3 at this time is stored by the signal from the RAM address counter 4, and the audio data corresponding to the address information is read from the RAM 3 by the stored address information. RAM to stop things
The RAM 3 is controlled via the address counter 4.

When the sub-code P'is "1", that is, by removing the audio data corresponding to an unnecessary silent portion such as between songs by the stopping means 9 as described above, a necessary voiced portion that becomes a song is obtained. Only audio data can be recorded on the magneto-optical disk densely, that is, packed. By omitting the audio data as the silent portion and recording the data, the subcode P "1" is not recorded on the magneto-optical disk.

The signal adding means 10 is the stopping means 9
Alternatively, based on the signal from the subcode P detecting means 5,
The address information of the audio data written in the RAM 3 when the subcode P ′ is “1” is stored by the signal from the RAM address counter 4.

Further, the signal adding means 10 and the RAM
When the data block before the first data block in the audio data whose reading from the RAM 3 is stopped is modulated by the encoder 8 according to the address information stored in 3, the subcode of the data block is changed to the subcode. A signal (inter-track information) where P is "1",
The encoder 8 is controlled so as to be added as a new function of the subcode P. As a result, the position of the audio data, which is the removed silent portion, can be searched by using the subcode P.

Next, a system for inputting and recording the analog signal will be described. First, as shown in FIG. 2, an analog cassette tape, an audio signal which is an analog signal of a radio, etc. is inputted. Input terminal 12 is provided.

An analog signal is input from the analog input terminal 12, and an LPF (Lo
w Pass Filter) 13 is provided. This LPF1
An A / D converter 14 is provided for converting the analog signal from 3 into quantized data which is a digital signal.

The quantized data from the A / D converter 14 is input to and written in the RAM 3 similarly to the digital signal input described above, and then read, processed, and written.

Further, there is provided an inter-song and silent part detecting means (judging means) 15 to which the quantized data is inputted. The inter-song and silence detecting unit 15 determines whether the quantized data is equal to or higher than a preset level value.

When the quantized data less than the level value continues for a certain period of time, it is determined that the space between songs or the silent portion starts, and the RAM address of the data block at that time is stored in the control microcomputer 6 as a start address. ing.

When the quantized data of the level value or more continues for a certain period of time, it is determined that the next music piece starts, the data block before the data block at that time is regarded as the end of the music piece, and the data block The RAM address is stored in the control microcomputer 6 as the end address.

Further, the control microcomputer 6 measures the time interval between the start address and the end address. If the time interval is, for example, 1 second or more, it is determined that the address is a music interval, and By the stopping means 9,
Except for prohibiting the reading of the quantized data corresponding to the tune from the RAM 3, other quantized data is continuously output to the compression LSI 7. On the other hand, if the time interval is less than 1 second, for example, it is determined that there is no interval between songs, and the quantized data is not removed.

Similar to the digital signal input described above, such quantized data is compressed by the compression LSI 7 to generate compressed data, and the compressed data is converted into a recording format by the encoder 8 to record the digital signal. At the time of E, the above-mentioned subcode P was added
It is recorded as an FM signal.

Next, a system for reproducing the recorded compressed data will be described. First, as shown in FIG.
An EFM signal read by an optical pickup (not shown) is input from a magneto-optical disk (not shown), and the EF
A decoder 16 is provided which demodulates the M signal, performs error correction, restores each data block, separates the compressed data and the subcode from the data block, and outputs the separated data.

The compressed data from this decoder 16 is R
The subcode is temporarily written in the RAM 3 together with the address information generated by the AM address counter 4, while the subcode is input to the subcode P detecting means 5, and the subcode P detected from the subcode is "1" or "0". Is detected.

In the present embodiment, detection of the subcode P'from the auxiliary code portion included in the digital signal from the compact disc or the like and detection of the subcode P from the subcode recorded on the magneto-optical disc. Is the subcode P
An example in which the detection unit 5 is shared is given, but different detection units or detection units may be provided for each of the above detections.

Further, the compressed data is read out from the RAM 3 and inputted, and an expansion LSI 17 for restoring the compressed data to audio data is provided, and the audio data which is a digital signal is converted into an analog signal and outputted as an audio signal. A D / A converter 18 is provided. Such an audio signal is amplified by an amplifier not shown and reproduced by an earphone or a speaker not shown.

The control microcomputer 6 is provided with the generation means 11, and the generation means 11 has a new function from the subcode when each compressed data recorded on the magneto-optical disk is reproduced. When a subcode P "1" of the subcode P is detected, an audio signal showing a level value of zero for a predetermined time, for example, 1 to 2 seconds, between the data block corresponding to the subcode P and the subsequent data block. The decompression LSI 17 is controlled so as to generate data, restore it, and output it.

By this, a pause can be formed between the music and the music following it, so that the following music is reproduced immediately after the music ends, that is, different music is continuously reproduced. You can avoid the unnaturalness. The level value corresponds to the reproduced sound pressure level of the audio signal when reproduced.

Next, the operation of the configuration of the above embodiment will be described. First, when a digital signal is input and recorded, as shown in FIG. 1, the audio data and the auxiliary code part are separated from the digital signal input from the digital signal input terminal 1 by the sub-code separating means 2. The audio data is sequentially and continuously written in the RAM 3. At this time, the RAM address value of each audio data is simultaneously written in the RAM 3 by the address counter 4.

When the sub-code P '"1" indicating the inter-track information in the user data is detected by the sub-code P detecting means 5 from the auxiliary chord portion, as shown in FIG. A write RAM address value of audio data when P'changes from 0 to 1, for example, S
_{n + 4} and write RAM address value of audio data when subcode P ′ changes from 1 to 0, S _{n + 7}
Is stored in the control microcomputer 6. In this specification, when the sub-code P'is "1", it indicates that the audio data is a silent part between the music pieces, and "0".
Indicates that the audio data is a voiced part such as a piece of music.

After that, when the audio data is read from the RAM 3, as shown in FIG. 5, among the audio data written in the RAM 3, between the RAM address values, that is, from S _{n + 4} to S _{n + 6} . The reading of the corresponding audio data is stopped by the stopping means 9, only the other audio data is continuously read, and the audio data is output to the compression LSI 7 for data compression.

In the compression LSI 7, the input audio data is compressed to about ⅕ by the ATRAC method, the compressed data is written again in the RAM 3, and then the compressed data written in the RAM 3 is read. The data is output, input to the encoder 8, converted into a recording format, and sequentially and densely recorded.

At this time, the RAM address value S of the audio data at the end of the music piece before the portion previously removed by the signal adding means 10, that is, when it is written in the RAM 3.
_In the subcode of the data block that becomes _{n + 3} , the subcode P indicating the inter-track information as a new function of the subcode P
Record “1” (see FIG. 5).

Next, the case where an analog signal is input and recorded will be described. First, as shown in FIG. 2, the analog signal input from the analog input terminal 12 is
After being input to the LPF 13 to remove high frequency components, A
The / D converter 14 converts the analog signal into quantized data which is a digital signal.

The quantized data is written in the RAM 3 as audio data together with its address information, and when the inter-song and silent part detecting means 15 continues to be less than the designated level value for a certain period of time, the inter-song or the silent part is played. Judged as the beginning of the club.

Then, the data block at that time is set as a data block in which a space between songs or a silent portion starts, and the RA
The M address is stored in the control microcomputer 6 as a start address.

On the other hand, when the quantized data is equal to or higher than the designated level value for a certain period of time, it is judged by the inter-track and silent section detecting means 15 that the next music is started,
The previous data block at that time is regarded as the end of the song, and the RAM address of the data block is stored in the control microcomputer 6 as the end address.

The time between the start address and the end address is calculated by the control microcomputer 6, and if the time is, for example, 1 second or more, it is determined that there is a music interval, and the RAM corresponding to this music interval.
Other audio data is stored in the RAM except that the audio data written in 3 is stopped by the stopping means 9 to stop the reading.
3 is read out and output to the compression LSI 7. On the other hand, if the time is less than 1 second, for example, it is determined that it is not between songs, and removal of audio data corresponding to this time is avoided.

In this way, the space between songs or the silent portion is removed, and thereafter, the same processing as the digital signal input is performed, and the compressed data converted into the recording format and the sub-code P added thereto are recorded. As a result, the recording space of the music can be expanded and recorded. The above-described configuration of the above-described embodiment is realized by such a structure of the above embodiment by temporarily writing the audio data in the RAM 3 and then performing signal processing of the audio data.

Next, a method of reproducing the compressed data recorded as described above will be described. As shown in FIG. 3, the EFM signal reproduced from the magneto-optical disk is input to the decoder 16 and demodulated. After the error correction is performed, the subcode P detection unit 5 detects whether or not the subcode P is “1” from the compressed data. The sub-code P "1" is recorded as new inter-track information.

Further, the compressed data is sequentially written in the RAM 3 together with its address information. The compressed data written in this way is read and input to the decompression LSI 17 that restores the compressed data.

The decompression LSI 17 receives the compressed data from the RAM 3, and if the subcode P as the inter-track information related to the compressed data changes from 0 to 1 when decompressing, the decompression LSI 17 outputs from the subcode P detecting means 5. Based on the signal, the control microcomputer 6 newly inserts audio data indicating a predetermined audio signal output zero state for, for example, 1 to 2 seconds, that is, a music interval, and outputs the audio data continuously with the next audio data. Thus, the expansion LSI 17 is controlled.

The audio data to which the intervals between songs have been added in this way is converted into an audio signal which is an analog signal by the D / A converter 18, and the audio signal is
It is amplified by an amplifier not shown and reproduced by earphones or speakers not shown.

As described above, in the configuration of the above-described embodiment, only the audio data which becomes the voiced part can be densely recorded excluding the silent parts such as the intervals between songs. The recording space on the disc
It can be increased more than ever before and can be used to the maximum extent.

Moreover, in the above configuration, since only the audio data which becomes the sound part can be densely recorded, the original function of the subcode P is unnecessary, but the subcode P can be utilized as a new function. Therefore, with a simple configuration, when the above audio data is played back, it is possible to add a silence part such as between songs, eliminating the unnaturalness that a song and the next song are played immediately immediately afterwards. it can.

[0071]

As described above, in the digital signal recording / reproducing apparatus according to the first aspect of the present invention, the main data portion in which the analog signal is digitized and the silent main data portion corresponding to the silent portion of the analog signal are provided. And a supplemental code section indicating that the main data section is written to the main data section for signal processing, and the main data section read from the memory is signal-processed. A data section is recorded on a recording medium, a detecting means for detecting the auxiliary code section is further provided, and a stopping means for stopping reading the silent main data section from the memory based on a signal from the detecting means. Is provided.

Therefore, in the above configuration, the stopping means prevents the silent main data portion from being recorded in the recording medium based on the signal from the detecting means, and only the main data portion which becomes the voiced portion is densely packed. Since the data can be recorded on the recording medium, it is possible to increase the recording amount of the main data portion, which is the voiced portion that can be recorded on the recording medium whose recording space is fixed in advance.

In the digital signal recording / reproducing apparatus according to the second aspect of the present invention, as described above, in order to perform signal processing on the main data portion obtained by converting an analog signal such as an audio signal into a digital signal, the main data is recorded. A memory in which a part is written is provided, and a processed data part obtained by signal processing the main data part read from the memory is recorded on a recording medium, and further, the main data part corresponds to the reproduction level of the analog signal. If a level value is detected and the level value is equal to or less than a predetermined value for a predetermined time, a judgment means for judging that there is a music interval such as a music interval is provided, and based on a signal from the above-mentioned judgment means. A stop means is provided for stopping the reading out of the silent main data portion corresponding to the intervals between the songs from the memory.

Therefore, in the above-mentioned structure, the stop means prevents the silent main data portion whose level value is the predetermined value or less based on the signal from the judging means from being a silent portion from being recorded in the recording medium. Since only the main data portion that is the voiced portion can be densely recorded on the recording medium, it is possible to increase the recording amount of the main data portion that is the voiced portion that can be recorded on the recording medium with a predetermined recording space. There is an effect that becomes.

In the digital signal recording / reproducing apparatus according to claim 3 of the present invention, further, when the reading of the silent main data portion from the memory is stopped, a subcode corresponding to the main code portion before the silent main data portion is added. Is provided with signal adding means for adding the inter-track information indicating that there is a silent main data part after the main data part and recording it on the recording medium, and when the recording medium is reproduced, the inter-track information from the sub-code is recorded. A detection means for detecting that the main portion of the main sound is generated at a predetermined time interval when the inter-track information is detected based on a signal from the detection means. This is a configuration in which a generation unit that outputs the data continuously is provided after the data unit.

Therefore, in the above configuration, when the inter-track information added by the signal adding means is detected by the detecting means from the sub-code, the silent main data portion is generated by the generating means based on the inter-track information. Since it can be generated and output after the main chord part corresponding to, the silent part can be formed between the main chord part and the next main chord part.

Therefore, the above configuration further avoids an unnatural reproduction in which, for example, the reproduction of one music as a group of related main data parts is finished and the reproduction of the next music is immediately started. There is an effect that can be.

[Brief description of drawings]

FIG. 1 is a principal block diagram showing a digital signal recording system of a digital signal recording / reproducing apparatus of the present invention.

FIG. 2 is a principal block diagram showing an analog signal recording system of the digital signal recording / reproducing apparatus.

FIG. 3 is a principal block diagram showing a reproducing system of the digital signal recording / reproducing apparatus.

FIG. 4 is an explanatory diagram showing a relationship between audio data written in a RAM and a subcode P ′ during recording in the digital signal recording / reproducing device.

FIG. 5 is an explanatory diagram showing a relationship between the read audio data and a subcode P as a new function during reproduction by the digital signal recording / reproducing apparatus.

[Explanation of symbols]

 3 RAM (memory) 5 Subcode P detecting means (detecting means) 9 Stopping means

Claims (3)

[Claims] 1. A main data part in which an analog signal such as an audio signal is digitized, and an auxiliary code part indicating a silent main data part which is a main data part corresponding to a silent part of the analog signal are inputted, and A digital signal is provided in which a memory into which the main data section is written is provided, and a processed data section obtained by signal processing the main data section read from the memory and a subcode are sequentially recorded and reproduced on a recording medium in a predetermined signal format. In the recording / reproducing apparatus, a detection means for detecting the auxiliary code portion is provided, and a stop means for stopping the reading of the silent main data portion from the memory based on a signal from the detection means is provided. Characteristic digital signal recording / reproducing device. 2. A memory is provided in which an analog signal such as an audio signal is converted into a main data portion which is a digital signal, and the main data portion is written, and the main data portion read from the memory is signal-processed. In a digital signal recording / reproducing apparatus in which a processed data section and a subcode are sequentially recorded and reproduced on a recording medium in a predetermined signal format, a level value corresponding to the reproduction level of the analog signal is detected from the main data section. If the level value is below a predetermined value for a predetermined time, a judging means for judging that period to be a silent main data portion is provided, and the silent main data portion is set to the aforesaid one based on a signal from the judging means. A digital signal recording / reproducing apparatus characterized in that stop means for stopping reading from the memory is provided. 3. The inter-track information indicating that there is a silent main data section between the main data section and the next main data section based on the signal from the stopping means corresponds to before the silent main data section. Signal adding means for adding to the sub-code recorded together with the main data part and recording it on the recording medium is provided, and detecting means for detecting inter-track information from the sub-code when the recording medium is reproduced is provided. Generating means for generating a silent main data portion whose level value is below a predetermined value at a predetermined time interval when the inter-track information is detected, based on the signal from The digital signal recording / reproducing apparatus according to claim 1 or 2, further comprising: