JPH0676476A - Method and device for compensating auto-reverse section of digital signal processing system - Google Patents

Abstract

PURPOSE: To prevent data from being not recorded at the moment of an automatic reverse operation by outputting data after inputted data is accumulated at the moment of the automatic reverse operation and recording it in a tape. CONSTITUTION: An audio signal is encoded in an encoder/decoder part 16 through the A/D converter 10 and the sub-band filter 14 of a signal processing means 100 and it is inputted to the memory 20 of an automatic reverse section compensation means 200. At that time, a micro computer 22 applies a clock, reads data in the memory 20, inputs it to the error correction part 32 of a data processing means 300 and restores and outputs data damaged during transmission by adding an addition code. The data is modulated in a modulator/ demodulator 34 and it is recorded in the tape through an amplifier 36 and a head 42. When the recording of one side completes, the automatic reverse operation is executed by a travel system 40. A computer 22 outputs a synchronizing signal from a detection part 24 immediately before and records data accumulated in the memory 20 during an automatic reverse section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital signal processing (recording or reproducing) system, and more particularly, to an automatic reverse section compensation of a digital signal processing system for preventing no recording or interruption of reproduced sound during automatic reverse operation. A method and apparatus.

[0002]

2. Description of the Related Art Generally, a recently announced DCC (Digital Compact Cassett) is used as a digital audio tape recorder for recording and reproducing digital signals.
e) and DAT (Digital Audio Tape reco
rder). Here, in the case of DCC, the tape is used in the form of auto-reverse on the A side and the B side as in the existing analog cassette tape. Further, since the DAT uses a rotary magnetic head like the VCR, only one side of the tape is used. Among them, the DCC is auto-reversed during recording or reproduction like an existing cassette tape.

However, if auto-reverse is performed during recording, data is continuously input, but the data is lost because it is not recorded on the tape, and if auto-reverse is performed during reproduction, a period during which auto-reverse is performed. There is a problem that the output (for example, audio signal) is interrupted because the medium data cannot be reproduced. On the other hand, there has been a demand for an auto-reverse section compensating method or device that prevents unrecorded portions from occurring even at the time of auto-reverse operation and prevents the phenomenon of sound interruption during reproduction.

Japanese Patent Laid-Open No. 62 (1987) -1759
No. 09 "Digital signal reproducing device" utilizes a digital memory when reproducing digital signals recorded in a plurality of track areas divided in the width direction of the tape by reversing the running direction of the tape. Technology that can be played back without interrupting the output is introduced. The above-mentioned digital signal reproducing device is a device for sequentially reproducing a digital signal from a plurality of track areas divided in the width direction. In an odd-numbered track area, recording is performed at a recording end position on the other end side in the longitudinal direction. The end identification signal, the recording start identification signal is recorded at the recording start position on the one end side,
In an even-numbered track area, a tape running system capable of running a tape in which a recording start signal is recorded on one end side in the longitudinal direction and a recording end identification signal is recorded on the other end side in the first direction and the second direction, Digital signal from each track area of the tape,
The signal reading means for reading the recording end identification signal and the recording start identification signal, the signal detection means for detecting the digital signal, the recording end identification signal and the recording start identification signal from the output of the signal reading means, and the recording end identification signal are detected. When the recording start signal is detected, a high-speed (1.1
From the time when the recording start identification signal is detected, the speed control means that runs at a normal speed from the time when a predetermined time elapses to the time when the recording end identification signal is detected, the digital signal read out above, Memory control means for continuously reading from the digital memory at the same speed as the written speed for the period from the time when the predetermined time has elapsed to the time when the recording end identification signal is detected.

[0005]

In the above technique, however, the tape running speed must be changed in order to prevent the output from being interrupted due to the reversal of the running direction. However, when the tape running speed is changed, not only the mechanical shock due to the speed change is unavoidable, but also the noise generated at the moment of changing the speed has to be absorbed.

Further, when data is recorded on the tape and the traveling direction of the tape is reversed, there is a problem that the data input during the reversal cannot be recorded. Therefore, it is an object of the method and apparatus for compensating an auto-reverse section of a digital signal processing system according to the present invention to prevent data from not being recorded at the instant of operation of auto-reverse. In addition, it is possible to prevent the sound from being interrupted without changing the running speed of the tape at the time of reproduction and to continuously reproduce the sound.

[0007]

In order to achieve the above object, the method of compensating for the auto-reverse section of the digital signal processing system according to the present invention is to temporarily store the input data, then output and record it on the tape. However, while generating a sync signal at the beginning and end of auto-reverse, recording step to record on tape, and sequentially storing data reproduced on tape in memory, after having an initial delay time longer than auto-reverse period, memory Read the data from
The automatic reverse section compensating device of the digital signal processing system comprises a signal processing means for processing an audio signal and a data processing and recording the tape on a tape. Or a digital processing means for processing and outputting a signal reproduced from the tape, and a digital processing means after temporarily storing the digital signal processed and input by the signal processing means during the recording auto-reverse interval. It is configured so that it is sequentially output to and recorded on a tape, and during reproduction, a reproduction signal processed and output by the digital processing means is sequentially accumulated, and then delayed for a predetermined time and output to the signal processing means. To be done.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, a signal processing means 100 for processing an audio signal and a digital processing means 300 for processing data and recording it on a tape or processing and outputting a signal reproduced from the tape, After the digital signal processed and input by the signal processing means 100 is temporarily stored in the automatic reverse section at the time of recording, the digital processing means 30
0 is sequentially output to be recorded on a tape, and at the time of reproduction, the reproduction signal processed and output by the digital processing means is sequentially accumulated, and then delayed for a predetermined time and output to the signal processing means. Composed.

Here, the signal processing means 100 includes an A / D converter 10 for converting an audio signal input as an analog signal into a digital signal, and an audio signal converted into a digital signal by the A / D converter 10. When input, a subband filter 14 that passes only a necessary audio frequency band in consideration of human auditory characteristics, and whether the audio signal passed by the subband filter 14 is encoded and output to the data processing means 300 side. An encoding / decoding unit 16 for decoding the data input from the data processing means 300 side and outputting the data to the subband filter 14.
After being decoded by the decoding unit 16,
D / A converter 1 for converting a digital signal input through the subband filter 14 into an analog signal and outputting the analog signal
2 and.

The auto-reverse section compensating means 200 is controlled by the microcomputer 22, stores the signal input from the signal processing means 100 over the entire traveling section including the auto-reverse section, and then stores the same over the entire traveling section. The signals are sequentially output to the data processing means 300 at a high speed, the signals reproduced by the data processing means 300 are delayed for a predetermined period (a little longer than the time for performing the auto-reverse operation) from the initial stage, and then sequentially output to the signal processing means 100. Output memory 20
When the recording is controlled by the microcomputer 22, a synchronization signal is generated at the beginning and the end of the auto-reverse at the time of recording so that it is recorded on the tape, and at the time of reproduction, the synchronization signal reproduced is detected and output to the microcomputer 22. The signal generation / detection unit 24.

The data processing means 300 is controlled by the microcomputer 22 of the automatic reverse section compensating means 200, a running system 40 for running the tape, and a running system 40.
A head 42 for recording data on or reading data from the running tape, and recording and reproducing heads 36, 38 for amplifying a signal recorded on the tape by the head or reproducing a signal reproduced by the head 42. , After inserting the synchronizing signal generated from the synchronizing signal generating and detecting section 24 of the auto reverse section compensating means 200 into the signal recorded on the tape through the recording head amplifier 36 and the head 42, or after reading from the tape by the head 42, A modulator / demodulator 34 for extracting a synchronization signal from the data input via the reproduction head amplifier 38, and a signal input from the memory 20 of the auto-reverse interval compensating means 200 or a signal input from the modulator / demodulator 34 are transmitted. Error data that is restored to the original data and output to the memory 20 or the modulator / demodulator 34. Composed of action unit 32.

Next, the operation and action of the automatic reverse section compensator according to the present invention will be described in detail with reference to the timing charts shown in FIGS. First, at the time of recording, an analog audio signal shown in FIG. 2A is input to the A / D converter 10 of the signal processing means 100. The A / D converter 10 converts the analog signal into a digital signal as shown in FIG. 2B and outputs it.

The sub-band filter 14 passes only the audible voice frequency band in consideration of human hearing characteristics from the signal converted into the digital signal as shown in FIG. 2B. The encoder / decoder unit 16 encodes and outputs the signal output from the subband filter 14. The signal output from the encoder / decoder unit is recorded in the memory 20 of the automatic reverse section compensating means 200.

At this time, the microcomputer 22 applies a control signal (or clock) to read the data recorded in the memory 20. At this time, the speed at which the microcomputer 22 reads data from the memory 20 is the same as the speed at which the signal processing means 100 inputs the data to the memory 20. The data read by the memory 20 is stored in the error collection unit 32 of the data processing unit 300.
Entered in.

The error correction unit 32 restores the data damaged during transmission to the original data by using the additional code and outputs it. The modulator / demodulator 34 modulates and outputs the data output from the error correction unit 32. The modulated data is recorded by the recording head amplifier 36 and the head 4.
2 to tape.

The running system 40 is controlled by the microcomputer 22 to run the tape. As described above, when the data is recorded on the tape and the recording on one side (A side) is completed, the auto-reverse operation for automatically changing the running direction of the tape is as shown in FIG. Td is advanced during a predetermined section. Here, the auto-reverse is performed by the traveling system 40 controlled by the microcomputer 22. At this time, the microcomputer 22 controls the sync signal generation and detection unit 24 immediately before the automatic reverse operation is performed to generate the sync signal.

The generated synchronizing signal is recorded on one side (A side) as shown in (D) of FIG. After that,
The microcomputer 22 gives a delay time so that data is not output from the memory 20 during the automatic reverse period Td as shown in FIG. However, the data output from the signal processing means 100 is continuously input to the memory 20 as shown in FIG. After all, the memory 20 is in a state in which data to be successively input is stored even during the automatic reverse section Td.

At the moment the auto-reverse is completed, the microcomputer 22 controls the synchronizing signal generating and detecting section 24 to generate the synchronizing signal, and the memory 2
By controlling 0, the data read operation immediately following the data recorded on one side surface (A side) is restarted. After all, as shown in FIG. 2G, the data is not read from the memory 20 during the auto-reverse operation, but the input data is completely read. The read data is input to the modulator / demodulator 34 via the error correction unit 32 of the data processing means 300.

At this time, the modulator / demodulator 34 modulates and outputs the synchronization signal generated from the synchronization signal generation / detection unit 24, and then immediately inputs the input data to the recording head amplifier 36.
To the head 42 via. Therefore, the head 42 records the data outputted with the synchronization signal and the delay time Td on the other side surface (B side) as shown in FIG.

Therefore, as shown in (1) of FIG. 2, all the data is recorded on the one side surface (A side) and the other side surface (B side) of the tape without loss of the input data during the auto-reverse section. At this time, a synchronization signal is recorded at the tail of one side (A side) data and the entrance of the other side (B side) data. Next, the time of reproduction will be described.

As shown in FIG. 3A, when a tape in which data is continuously recorded on one side surface (A side) and the other side surface (B side) is run by the running system 40, the data processing means 30
Data is read from the tape by the head 42 of 0. The read data is the reproduction head amplifier 38.
Is output to the modulator / demodulator 34 via. The modulator / demodulator 34 demodulates the input data and outputs the demodulated data to the error correction unit 32. The error collection unit 32 restores the damaged data and outputs it to the memory 20. The memory 20 stores the input data. When the data is stored in the memory 20, the microcomputer 22 controls the memory 20 to delay the data for a predetermined time TdP1 as shown in FIG. The output data is decoded by the encoder / decoder unit 16 of the signal processing means 100.

At this time, the predetermined time for delaying the data in the memory 20 is the same as or longer than the time during which auto-reverse is performed in a normal digital signal processing system. Therefore, after all the data recorded on one side (A side) of the tape is read from the tape by the head 42, as shown in (C) of FIG. The signal delayed for a predetermined time is continuously output as shown in FIG.

On the other hand, when the sync signal recorded at the end of the data is reproduced after all the data recorded on one side surface (A side) of the tape is reproduced, the sync signal generation / detection unit 24 detects it. To be done. Sync signal generation and detection unit 2
When the sync signal is detected by 4, the microcomputer 22 considers the time when the auto-reverse is completed in the time when the sync signal recorded at the tail of the data on one side (A side) is taken into consideration ((in FIG. 3). The delay over time TdP2 as shown in D) is calculated.

The microcomputer 22 delays the operation of the running system during the calculated delay over time TdP2 and delays the reproduction time of the data recorded on the other side surface (B side) of the tape by the head 42. As described above, the delay time TdP2 has a medium delay time,
When the data on the other side (side B) is reproduced and input to the memory 20, the memory 20 outputs the final data reproduced on one side (side A) as the time when the other side as shown in FIG. The first data on the B side is output from the memory 20 one after another. In this way, the automatic reverse section compensation means 20
The data output from 0 is decoded by the encoding / decoding unit of the signal processing means 100, and then the D / A converter 12 via the subband filter 14.
Is output to.

Therefore, the signal converted into an analog signal by the D / A converter 12 is reproduced and output as a subsequent signal as shown in FIG. Here, the other side of the tape (B
Delay time TdP performed when playing
The delay time in 2 may not be set according to the user's need. That is, the data output from the memory 20 to the signal processing means 100 under the control of the microcomputer 22 will not be generated even if the reproducing operation on the other side (B side) is immediately performed after the reproducing operation on one side (A side) and the auto-reverse operation. Figure 3 (E)
As shown in FIG.

In FIG. 4, the compensating method of the present invention temporarily stores the input data in the memory, then outputs the data and records it on the tape. At the beginning and the end of the auto-reverse, synchronization signals are generated. Recording step to record to,
The data reproduced on the tape is sequentially stored in the memory, and after the initial delay time longer than the auto-reverse period, the data is read from the memory so that the data is constantly output even in the auto-reverse period. And a playback step.

At this time, the memory has a capacity sufficient to record the data read by the tape by the head during the automatic reverse section. On the other hand, in the recording step in the above, the input data is stored in the memory,
The first step of reading data from the memory without delay and recording it on the tape, and as in the first step, if the data is in the auto-reverse section, a sync signal is generated at the end of the recorded data and the The reverse operation is performed, and the input data is continuously stored in the memory, and the second stage, when the auto-reverse is completed in the second stage, a synchronization signal is generated and recorded on the tape, and then stored in the memory. And the third step of sequentially reading the data to be recorded in the memory and recording the data.

In the reproducing step, after a first step of reading data from the memory and an intermediate synchronization signal for performing the first step are detected after an initial delay time longer than the auto-reverse period, the automatic step is performed. When the reverse operation is performed, the second step of continuously reading and outputting the data stored in the memory and the auto-reverse during the second step are completed and the sync signal is detected, the tape is reproduced. After the operation is delayed by the difference between the initial delay time and the auto-reverse period, the third step is performed, and while the second step is performed, the auto-reverse is completed, but the sync signal is not detected for a certain period of time. And a fourth stage in which the tape reproducing operation is performed without delay time.

Next, the compensation method according to the present invention will be described with reference to FIGS.
And it explains in full detail along with FIG. First, as shown in FIG. 4, the microcomputer 22 initializes the memory 20 and then determines whether the digital data processing system according to the present invention performs a recording operation (step 101). As a result, if the digital data processing system is in the recording operation, the data input from the signal processing means 100 to the memory is read and recorded on the tape A surface (step 102). At this time, the microcomputer judges whether it is the auto-reverse section while recording on the A side (step 103). As a result, if it is not the auto-reverse section, the data input to the memory is output without delay time (step 10).
4). That is, the output data is continuously recorded on the tape A surface. When the above recording is completed, the digital data processing system performs the auto-reverse operation.

At this time, the microcomputer 22 controls the synchronizing signal generating and detecting section 24 to generate the synchronizing signal (step 105). The generated synchronizing signal is recorded on the tape by the head 24 just before the automatic reverse is performed. That is, the synchronization signal is recorded at the end of the data recorded on the A side. Along with this, the data output from the memory is interrupted, so the operation of recording the data on the tape is
It is temporarily stopped (step 106). At the same time, the digital signal processing system performs auto-reverse (step 107). The microcomputer 22 successively stores the input data while increasing the address of the memory 20 (step 108).

That is, the data input during the auto-reverse is not recorded on the tape, but is continuously stored in the memory. While storing data like this,
The microcomputer determines whether the auto reverse has been completed (step 109). As a result of the above judgment, the auto-reverse is terminated, the microcomputer 22 controls the synchronizing signal generating and detecting section 24 to generate the synchronizing signal (step 110), and the generated synchronizing signal is recorded on the tape by the head 42.

At this time, the sync signal is recorded on the tape B surface because the auto-reverse has been completed. When the sync signal is recorded on the tape B surface after the auto-reverse is performed, the microcomputer 22 controls the memory to sequentially read the stored data during the time of performing the auto-reverse and record the data on the tape through the head 42. (Step 111). Therefore, the data recorded on the tape B side is
The delayed signal is recorded in the memory during the auto-reverse period.

On the other hand, it is judged in step 101 whether it is a recording operation, and if so, it is judged whether it is a reproducing operation (step 115). As a result of the above judgment, if the digital signal system is not in the reproducing operation, the corresponding operation is performed, and if it is the reproducing operation in step 116, the tape A surface is reproduced (step 117). The reproduced data is input to the memory 20. When input to the memory 20, the microcomputer 22 sets the initial delay time TdP.
At 1, the data is read from the memory (step 118).

Here, the delay time TdP1 is for compensating the time for performing the auto-reverse later, and is the same as or longer than the time required for the normal auto-reverse in the digital signal processing system. As described above, the data reproduced from the tape and input to the memory 20 has a delay time, is read and output to the signal processing means 100, and the microcomputer 22 determines whether it is the auto-reverse section (step 119). . as a result,
If it is not the auto-reverse period, the microcomputer 22 determines the presence of the sync signal from the data read through the sync signal generation / detection unit 24 (step 12).
0). If there is no sync signal in step 20, step 1
Continue with 17.

As a result of performing steps 119 and 120, if it is in the auto-reverse section or if a synchronizing signal is detected, the auto-reverse operation is performed (step 121).
The microcomputer 22 continuously reads the data from the memory 20 and outputs it to the signal processing means 100 while performing the auto-reverse operation (step 122). At this time, the data output from the memory can be the data reproduced from the tape during the initial delay time and stored in the memory.

After that, the microcomputer 22 determines the end of the auto-reverse (step 123). When it is finished, the presence of the sync signal is judged (step 12).
4). As a result of the above judgment, if there is no sync signal even though the auto-reverse has been completed, the existence of the sync signal is continuously judged for a certain time (step 125). If there is no sync signal even after the elapse of a certain time, the tape B side is reproduced (step 126). The above reproduction data is stored in the memory 2
The data is stored in 0, and the microcomputer 22 continuously reads the data from the memory 20 and outputs it to the signal processing means 100 (step 128).

When the auto-reverse is completed and the sync signal is detected from the tape B side, the microcomputer 22
Is the initial delay time TdP1 and the automatic reverse operation time TS
Is subtracted to calculate the delay over time TdP2, and the reproduction of the tape B side is delayed during the calculated delay over time TdP2 (step 127). Step 127
After the execution of, the reproduction of the tape B side is started, and the microcomputer 22 controls the memory 20 to continuously read the data (step 128).

Therefore, the time when the initial data reproduced on the tape B surface is input to the memory 20 is the time when the final data reproduced on the tape A surface is read and output by the memory 20.

[0039]

As described above, the method and apparatus for compensating for the auto-reverse section of the digital signal processing system according to the present invention stores the data inputted at the instant of the auto-reverse operation in the memory, then outputs the data and records it on the tape. This has the effect of preventing data loss. Further, by continuously outputting data without changing the running speed of the tape at the time of reproduction, it is possible to prevent a sound interruption phenomenon. Further, it is obvious that the present invention can be modified in various ways without departing from the scope of the invention.

In particular, it should be apparent that the flowcharts of the present invention can be made by one of ordinary skill without any difficulty in reducing or adding steps to practice the present invention. Further, the apparatus of the present invention is not limited to the specifically described embodiment and can be applied to other signal processing means to be implemented.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of an auto-reverse section compensator for a digital signal processing system according to the present invention.

FIG. 2 is a timing chart at the time of recording data in the compensation device.

FIG. 3 is a timing chart at the time of reproducing data in the compensation device.

FIG. 4 is a flowchart of the compensation method of the present invention.

FIG. 5 is a flowchart following FIG.

[Explanation of symbols]

 10 A / D converter 12 D / A converter 14 Subband filter 16 Encoding / decoding 20 Memory 22 Microcomputer 24 Detection unit 32 Error collection 34 Modulator / demodulator 36 Recording head 38 Playback head 40 Running system 42 Head 100 Signal Processing means 200 Auto reverse section compensation means 300 Digital processing means

Claims (8)

[Claims] 1. The input data is recorded on a tape through a memory, but in the auto-reverse section, it is only stored in the memory, and a synchronization signal is recorded at the beginning and end of the auto-reverse section, and the auto-reverse section is recorded. During the period, the data accumulated and stored in the memory is subjected to auto-reverse and then sequentially read and recorded on the tape, and the data recorded on the tape in the recording step is sequentially read and stored in the memory, and then the memory is read from the memory. Data is read and output, but after having an initial delay longer than the auto-reverse period, by reading and outputting the data from the memory, the data is continuously output during the auto-reverse period performed by the synchronization signal. Auto-reverse interval compensation method for digital signal processing system consisting of a reproduction step Law. 2. The method for compensating for an auto-reverse section in a digital signal processing system according to claim 1, wherein the memory has a capacity capable of recording more data than data read by a tape in the auto-reverse section. . 3. The recording step stores the input data in a memory. The first step of reading the data from the memory and recording it on the tape without delay time, and the data recording as in the first step. In the case of the time auto-reverse section, a synchronization signal is generated at the end of the recorded data, the auto-reverse operation is performed after recording, and the input data is continuously stored in the memory in the second step,
When the auto-reverse is completed at the stage, a synchronization signal is generated and recorded on the tape, and then the data stored in the memory and the data continuously recorded in the memory are sequentially read and recorded in the third stage. An auto-reverse interval compensation method for a digital signal processing system as set forth in claim 1, including: 4. The reproducing step reads the data recorded on the tape and records it in the memory. After the initial delay time longer than the auto-reverse period, the first step of reading the data from the memory is performed. While performing the first step, when a sync signal is detected, the auto-reverse operation is performed, but the second step of continuously reading and outputting the data stored in the memory and the second step of performing the second step. When the auto-reverse is completed and the synchronization signal is detected, the tape reproducing operation is delayed by the difference between the initial delay time and the auto-reverse period, and then the third step and the second step are performed. Medium auto-reverse is completed, but if a sync signal is not detected for a certain period of time, the tape reproducing operation is performed without delay time. Item 2. A method for auto-reverse interval compensation of a digital signal processing system according to item 1. 5. A signal processing unit for processing an input / output audio signal, and a signal input from the signal processing unit for recording on a tape or a signal reproduced from the tape, When the digital processing means for outputting to the signal processing means and the inputted data are recorded on the tape, the digital signal processed and inputted by the processing means during the auto-reverse section is temporarily stored and the beginning of the auto-reverse section is set. At the end, a synchronizing signal is generated and output to the digital processing means so that it is recorded on the tape. During the auto-reverse period, the temporarily stored data is automatically reverse-read and then sequentially read and then the digital processing means. To be recorded on the tape, and when the data is reproduced, the data read on the tape is stored sequentially. After that, by outputting the stored data with an initial delay time longer than the auto-reverse period, an auto-reverse period compensating means for continuously outputting the data even during the auto-reverse period performed in accordance with the synchronization signal. An automatic reverse section compensator for a digital signal processing system, characterized in that 6. The automatic reverse section compensating means is controlled by a microcomputer to temporarily store a signal input over the entire traveling section including the automatic reverse section, and then stores data at the same speed over the entire traveling section. Outputs sequentially, but suspends data output during the auto-reverse interval during recording, and has an initial delay time during the specified period during playback, so that the input is interrupted during the auto-reverse interval and accumulated and stored. It is controlled by a memory that continuously outputs data and a microcomputer to generate a sync signal at the start and end points of auto-reverse at the time of recording so that it is recorded on the tape, and at the time of reproduction, it detects the sync signal reproduced and Synchronous signal generation to output to computer to control input / output of memory /
An auto-reverse section compensator for a digital signal processing system according to claim 5, which comprises a detector. 7. The automatic reverse section compensator for a digital signal processing system according to claim 5, wherein the memory has a capacity capable of recording more data than the data read by the tape in the automatic reverse section. . 8. The automatic reverse section compensator for a digital signal processing system according to claim 6, wherein the predetermined period is equal to or longer than a time for performing an automatic reverse operation.