JPH08203217A - Magnetic recording apparatus and magnetic recording/ reproducing apparatus - Google Patents

Abstract

PURPOSE: To omit an edit gap or the like with a simple constitution by adding required codes, in a block unit, to respective digital signals of a plurality of channels and then performing a prescribed shuffling processing operation. CONSTITUTION: In every block, an error correcting code and a block identifying code are added, by an error correcting and coding circuit 10 and an ID addition circuit 11, to four-channel digital audio digital signals DA1 to DA4 via an A/D converter 7. A digital video signal DV to which an error correcting code and an identifying code have been added by an error correcting and coding circuit 15 and an ID addition circuit 16 in the same manner as the digital audio signals is shuffled by a shuffling circuit 17, and the digital audio signals and the video signal in which the audio signals and the video signals are regulated and aligned so as not the exist mixedly and disorderly, are recorded obliquely on a magnetic tape 6. Thereby, a double recording operation for an edit gap and the digital audio signals can be omitted with a simple constitution, and a recording density can be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording device and a magnetic recording / reproducing device, for example, a video tape recorder (hereinafter referred to as a digital video tape recorder) adapted to convert a video signal and an audio signal into a digital signal for recording. Can be applied).

[0002]

2. Description of the Related Art Conventionally, in a digital video tape recorder, a video signal and an audio signal are converted into a digital signal (hereinafter referred to as a digital video signal and a digital audio signal) and recorded in a prescribed format. .

FIG. 3 shows a recording pattern of this type of digital video tape recorder. In this embodiment, a time code track TCT and a control track CT extending in the longitudinal direction are formed at the lower end of the magnetic tape 1. It Here, the time code track TCT is formed by recording a time code signal, whereas the control track CT is formed by recording a control signal for tracking control.

Further, on the upper end of the magnetic tape 1, an audio signal and a cue signal are recorded as analog signals extending in the longitudinal direction, whereby a cue audio track QAT is formed. On the other hand, between the cue audio track QAT and the control track CT,
Recording tracks T1, T2, T3, ... Are formed obliquely in sequence, and digital audio signals and digital video signals are recorded on these recording tracks.

Here, each of the recording tracks T1, T2, T3,
The video sector VS is formed in each of the scanning start end side region and the scanning end end side region of the magnetic head, and four audio sectors AS are formed in the center portion of each recording track between these video sector VS. It is formed.

Of these, the video sector VS is formed by recording a digital video signal together with an error correction code in a product code format, etc., so that in the digital video tape recorder, the magnetic head is driven at the timing of scanning the video sector VS. Then, the digital video signal is recorded and the reproduced signal output from the magnetic head is processed at this timing to reproduce the digital video signal.

On the other hand, as shown enlarged in FIG.
The audio sector AS is formed by forming four recording tracks in pairs, and is formed by recording 4-channel digital audio signals represented by numerals 1 to 4 together with an error correction code in a product code format. As a result, in the digital video tape recorder, while reproducing and mixing the digital audio signals of the first channel and the second channel represented by numerals 1 and 2, for example, the audio sector AS of the first channel is reproduced by the subsequent magnetic head. It can be recorded and edited easily.

Further, in the audio sector AS, as indicated by symbols O and E, digital audio signals corresponding to even and odd fields of the digital video signal are sequentially recorded alternately from the scanning direction of the magnetic head, and these four pairs are recorded. The recording position of the digital audio signal is shifted and double recording is performed between the recording tracks. As a result, in the digital video tape recorder, even if scratches extending in the longitudinal direction of the magnetic tape occur, the digital audio signal can be correctly reproduced by any audio sector.

[0009]

By the way, in this kind of digital video tape recorder, there is a case where, for example, only a digital audio signal of a prescribed channel or even a digital video signal is re-recorded. Therefore, the audio sector AS and the video are recorded. An area (hereinafter referred to as an edit gap) in which no signal is recorded is formed between the sectors VS so that the desired sector can be surely re-recorded.

If this edit gap can be omitted, it is considered convenient because the recording density of the digital video tape recorder can be further improved. Further, if the double recording of the digital audio signal can be omitted, the recording density can be further improved accordingly.

If the recording density can be improved in this way, the consumption of the magnetic tape can be reduced and the recording time can be increased.

Further, this type of digital video tape recorder, when performing editing processing such as after-recording and mixing, corresponds to the corresponding sector AS, V.
It is necessary to switch the operation of the magnetic head at the timing of scanning S, and this timing control also has a problem.

The present invention has been made in consideration of the above points, and an object thereof is to propose a magnetic recording device and a magnetic recording / reproducing device which can improve the recording density with a simple structure.

[0014]

In order to solve such a problem, the present invention provides an error correction coding circuit for adding an error correction code to a digital signal of a plurality of channels in a prescribed block unit, and a plurality of the above-mentioned error correction coding circuits. An identification code adding circuit for adding an identification code for identifying each channel to the digital signal of the channel in the preceding block unit, and a shuffling process for the digital signals of a plurality of channels to which the error correction code and the identification code are added. , A shuffling circuit for generating a recording data string in which blocks of the preceding multiple channels are sequentially continuous in a prescribed order, and a scanning locus of the magnetic head is formed diagonally on the magnetic tape, and the preceding recording data string is formed on this scanning locus. And a magnetic tape recording system for recording.

Further, at this time, the digital signals of the plurality of channels are composed of a digital video signal and a digital audio signal.

In addition, for digital signals of a plurality of channels,
An error correction coding circuit for adding an error correction code in a specified block unit, and an identification code addition circuit for adding an identification code for identifying each channel in the preceding block unit to the digital signals of the preceding plural channels When,
A shuffling circuit for shuffling digital signals of a plurality of channels to which the error correction code and the identification code are added to generate a recording data string in which blocks of the plurality of channels are sequentially consecutive in a prescribed order, and a recording head. And a magnetic tape recording / reproducing system that sequentially forms a scanning locus with the reproducing head preceding the recording head on the magnetic tape obliquely, and records a recording data string on the scanning locus of the recording head.
The reproduction data obtained from the previous reproduction head is deshuffled, and the deshuffling circuit that outputs this reproduction data for each channel based on the above identification code and the output data of this deshuffling circuit are subjected to error correction processing to An error correction circuit that outputs digital signals of a plurality of channels is provided, and when at least one channel of the digital signals of a plurality of channels recorded on this magnetic tape is re-recorded, the error of the previous digital signals of the remaining channels is reduced. The digital signal output from the correction circuit is input to the error correction coding circuit, and is recorded again by the recording head on the scanning locus scanned by the reproducing head.

At this time, the digital signals of the plurality of channels are composed of a digital video signal and a digital audio signal.

[0018]

An error correction coding circuit for adding an error correction code to each of a plurality of channels of digital signals in a prescribed block unit, and a plurality of channels of a preceding digital signal to identify each channel in a block unit. If an identification code adding circuit for adding an identification code is provided, each channel can be identified by this identification code and error correction can be performed for each channel. As a result, a shuffling circuit that performs shuffling processing on the digital signals of a plurality of channels to which the error correction code and the identification code are added to generate a recording data string in which blocks of a plurality of the preceding channels are sequentially consecutive in a prescribed order, and a magnetic By forming a scanning locus of the magnetic head on the tape in a diagonal manner and providing a magnetic tape recording system for recording the previous recording data sequence on this scanning locus, scanning can be performed without forming a gap in the scanning locus. A recording data string can be recorded without switching the operation of the magnetic head therein, and each channel can be reliably reproduced. Further, by shuffling digital signals of a plurality of channels, it is possible to effectively avoid the influence of scratches.

Further, at this time, if the digital signals of the plurality of channels are composed of a digital video signal and a digital audio signal, the recording density can be improved by applying to a digital video tape recorder.

In addition to the recording system as described above, a deshuffling circuit for deshuffling the reproduced data obtained from the preceding reproducing head and outputting the reproduced data for each channel based on the preceding identification code, An error correction circuit for performing error correction processing on the output data of the deshuffling circuit to output the digital signals of the preceding plural channels, and rerecording at least one channel of the digital signals of the plural channels recorded on the magnetic tape. For the digital signals of the remaining channels, the digital signal output from the previous error correction circuit is input to the error correction coding circuit, and is recorded again by the recording head following the scanning locus scanned by the reproducing head. , Digital signals of multiple channels are recorded on each recording track in this way. Even when Zaisa allowed to record, re-reliably recorded by a desired channel, it is possible to execute processing such as editing.

At this time, if the digital signals of the plurality of channels are composed of a digital video signal and a digital audio signal, they can be applied to a digital video tape recorder and edited.

[0022]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing a digital video tape recorder according to an embodiment of the present invention. In this embodiment, 4-channel audio signals SA1 to S1 are used.
The A4 and the video signal SV are converted into digital signals and recorded on the magnetic tape 6.

That is, in the digital video tape recorder 5, the analog-digital conversion circuit (A / D) 7
In the recording mode, each of the 4-channel audio signals SA1 to SA4 is subjected to analog-to-digital conversion processing to perform 4-channel digital audio signal DA1.
~ DA4 is output. Further, when the digital video tape recorder 5 is set to the edit mode, the analog-digital conversion circuit 7 executes the analog-digital conversion processing only on the channel selected by the user and stops the output of the digital audio signal on the remaining channels. .

The digital signal processing circuit 8 executes prescribed digital signal processing on the 4-channel digital audio signals DA1 to DA4, and corrects and outputs the frequency characteristics of the digital audio signals DA1 to DA4. Further, when the digital video tape recorder 5 is set to the edit mode, the digital signal processing circuit 8 executes these processing only for the channel selected by the user, and for the remaining channels, the digital signal processing circuit of the reproduction system. The digital audio signal output from 9 is output as it is.

As a result, the digital video tape recorder 5 can re-record the externally input audio signal for the channel selected by the user in the edit mode.

The error correction coding circuit 10 adds error correction codes for error correction to the digital audio signals DA1 to DA4 output from the digital signal processing circuit 8 in specified block units and outputs the added signals. Here, in the digital video tape recorder 5, an error correction code in a product code format is added to the data to be recorded, and the error correction coding circuit 10 adds an error correction code which is an outer code among them. To do.

The ID adding circuit 11 outputs digital audio signals DA1 to DA1 output from the error correction coding circuit 10.
For the DA4, an identification code (I
D: ident) and the synchronization pattern are added to each block and output. As a result, the digital video tape recorder 5 can identify the reproduced audio data based on this identification code.

On the other hand, the analog-digital conversion circuit 12 performs analog-digital conversion processing on the video signal SV in the recording mode and outputs a digital video signal DV. Further, the analog-digital conversion circuit 12 is
When the digital video tape recorder 5 is set to the edit mode and the user selects the edit processing of the audio signal, the output of the digital video signal DV is stopped.

The digital signal processing circuit 13 executes specified digital signal processing on each of the digital video signals DV, and corrects the frequency characteristics of the digital video signal DV and outputs the corrected signals. Further, the digital signal processing circuit 13 is used by the digital video tape recorder 5
Is set to the edit mode and the user selects the edit processing of the audio signal, the digital video signal output from the digital signal processing circuit 14 in the reproduction system is output as it is.

The error correction coding circuit 15 outputs the digital video signal D output from the digital signal processing circuit 13.
An error correction code, which is an outer code, is added to V in a prescribed block unit and output.

The ID adding circuit 16 adds the sync pattern and the identification code indicating the digital video signal to each block of the digital video signal DV output from the error correction coding circuit 15 and outputs it. . Thus, the digital video tape recorder 5 can identify the reproduced video data based on this identification code.

The shuffling circuit 17 is the ID adding circuit 1
The four-channel digital audio signals DA1 to DA4 output from 1 and the digital video signal DV output from the ID adding circuit 16 are shuffled and output. Thus, in the digital video tape recorder, 4-channel digital audio signal DA1
.About.DA4 and the digital video signal DV are sequentially arranged in a predetermined order in units of blocks to generate a recording data string.

In the digital video tape recorder 5,
By mounting a plurality of pairs of recording heads on the rotary drum and driving the plurality of pairs of recording heads, a video signal for one frame and an audio signal corresponding to the video signal are recorded on a plurality of recording tracks. Then, the shuffling circuit 17 generates a plurality of recording data strings DREC so as to correspond to the plurality of recording tracks.
Further, the shuffling circuit 17 switches the arrangement among a plurality of recording data trains DREC so as not to record the same channels of digital audio signals side by side in the longitudinal direction of the magnetic tape between the plurality of recording tracks. To process.

As a result, in the digital video tape recorder 5, even if scratches occur in the longitudinal direction of the magnetic tape 6, the dropouts due to the scratches are not concentrated on the same channel. Therefore, unlike the conventional digital video tape recorder, the digital video tape recorder 5 can reproduce correct data by the error correction process without double recording the digital audio signal. The recording density can be improved.

Also, with regard to the error correction code used for this error correction processing, the data amount can be reduced, and the recording density of the magnetic tape 6 can be improved accordingly.

The error correction coding circuit 18 adds an error correction code, which is an inner code, to the recording data string DREC output from the shuffling circuit 17 in a specified block unit, and outputs it to add a sync word. The circuit 19 adds a sync word to the output data string of the error correction coding circuit 18 and outputs it in a block unit to which the error correction code is added by the error correction coding circuit 18.

Thus, in the digital video tape recorder 5, a signal processing circuit (not shown) modulates the output data string of the sync word adding circuit 19 to convert it into a recording signal, and the recording head 20 is driven by this recording signal. .

As a result, as shown in FIG. 2, in the digital video tape recorder 5, recording tracks T1, T2, T3, ... Are sequentially formed on the magnetic tape 6 in a diagonal manner to mix digital audio signals and digital video signals. Then, the digital audio signal and the digital video signal are recorded on the respective recording tracks T1, T2, T3, .... Therefore, in the magnetic tape 6, the edit gap can be omitted, and the postamble and the preamble formed before and after the edit gap can be omitted, and the recording density can be improved accordingly. Further, the sync pattern can be shortened as compared with the case of recording by dividing into segments, and the recording density can be improved accordingly.

Further, at the time of recording, it is possible to omit the switching of the operation of the recording head 20 at the timing of scanning each segment as in the conventional digital video tape recorder, and the timing control can be simplified accordingly. .

In this magnetic tape 6, the control track CT, the time code track TCT, and the cue audio track AQT are formed in the same manner as in the conventional digital video tape recorder.

In the digital video tape recorder 5, a reproducing head 21 for reproduction is arranged so as to precede the recording head 20, and in the edit mode and the reproducing mode,
By an amplifier circuit, a signal processing circuit, and a demodulation circuit not shown,
The output signal of the reproducing head 21 is subjected to signal processing to generate reproduced data DPB.

The sync detection circuit 23 receives the reproduction data D
A sync word is detected from PB to generate a timing signal. The error correction circuit 24 detects the error correction code added by the error correction coding circuit 18 based on this timing signal, and performs error correction processing on the reproduced data DPB with this error correction code.

Similarly, the deshuffling circuit 25 detects the identification code from the reproduction data output from the error correction circuit 24 with the timing signal as a reference, and performs the deshuffling process with the identification code as a reference. Further, the deshuffling circuit 25 identifies the digital video signal and the digital audio signal of each channel based on the identification code, and the digital video signal is corrected by the error correction circuit 26.
, While outputting the digital audio signal to the error correction circuit 27.

The error correction circuit 26 performs error correction processing on the digital video signal and outputs the digital video signal. The digital signal processing circuit 14 performs digital signal processing on the digital video signal, which is the reverse of recording, and then performs digital-analog conversion. The circuit (D / A) 28 converts into an analog signal and outputs the video signal SV.

The error correction circuit 27 performs error correction processing on the digital audio signal and outputs the digital audio signal. The digital signal processing circuit 9 performs digital signal processing on the digital audio signal, which is the reverse of the recording operation, and then performs a digital-analog conversion circuit. (D / A) Converted to analog signal at 29 and 4
The channel audio signals SA1 to SA4 are output. As a result, in the digital video tape recorder 5, the reproduction signal output from the reproduction head 21 is simply processed to reproduce the digital video signal and the digital audio signal, thereby simplifying the timing control of the reproduction head 21. It is designed to do.

In this series of reproduction systems, when the user edits the audio signal by selecting the edit mode, the digital signal processing circuit 14 outputs the digital video signal input from the error correction circuit 26 as it is to the digital signal processing circuit 8. To the digital signal processing circuit 9,
The digital audio signals other than the channels selected by the user are output to the digital signal processing circuit 8 as they are in the reproduction mode.

On the other hand, when the user selects the edit mode to edit the video signal, the digital signal processing circuit 9 outputs the digital audio signal input from the error correction circuit 26 to the digital signal processing circuit 8 as it is. .

Thus, in the digital video tape recorder 5, in the edit mode, the preceding reproducing head 2
Among the digital signals reproduced from No. 1, the digital signals other than the one to be edited are subjected to error correction processing and then output to the recording system. Together with the digital signal edited here, the magnetic tape 6 is recorded by the recording head 20 which follows. To record. Therefore, in this digital video tape recorder 5, the recording track is rewritten and the editing process is executed,
As a result, the same editing process as in the case where a digital signal is recorded in the conventional sector unit can be executed.

Therefore, the data recorded on the magnetic tape 6 is constantly refreshed by being subjected to error correction processing during editing, thereby reducing bit errors and the like when reproduced. Further, the parts forming the magnetic tape running system such as the guide posts are also demagnetized at the time of editing, and the initial good magnetic characteristics can be maintained.

In the above configuration, the 4-channel audio signals SA1 to SA4 and the video signal SV are respectively converted into 4-channel digital audio signals DA1 to DA in the analog-digital conversion circuits 7 and 12.
4. After being converted into a digital video signal DV, digital signal processing is performed in digital signal processing circuits 8 and 13, respectively.

These digital audio signals DA1 to DA1
In the subsequent error correction coding circuits 10 and 15, the DA4 and the digital video signal DV are each added with an error correction code of an outer code in a prescribed block unit, and the subsequent ID is added.
In the additional circuits 11 and 16, this block unit
The identification code and the synchronization pattern are added.

Further, the digital audio signals DA1 to DA1
In the subsequent shuffling circuit 17, the DA4 and the digital video signal DV are shuffled by shuffling processing by changing the arrangement in block units in a prescribed order, and a plurality of pairs of recording heads 20 mounted on the rotary drum are provided. Converted to a recorded data string. Further, at this time, the digital audio signals DA1 to DA4 and the digital video signal DV are recorded in a plurality of columns so that the same channels of the digital audio signals are not recorded side by side in the longitudinal direction of the magnetic tape 6 between a plurality of recording tracks. The shuffling process is performed by switching the array between the data strings DREC.

The recording data string thus formed is added with the error correction code of the inner code in the error correction coding circuit 18, and the sync word is added in the subsequent sync word addition circuit 19 to the recording signal. It is converted and supplied to the recording head 20. As a result, the digital audio signals DA1 to DA4 and the digital video signal D
V is a recording track T that is sequentially formed on the magnetic tape 6.
.., T2, T3 ,.

Further, between adjacent recording tracks, shuffling is performed by switching the array between a plurality of recording data strings DREC so that the same channel of the digital audio signal is not recorded in the longitudinal direction of the magnetic tape 6. As a result, even if the conventional double recording is omitted, the effect of scratches can be effectively avoided, and the recording density can be improved accordingly. Further, this makes it possible to record digital audio signals and digital video signals using a magnetic tape having a low recording density.

Further, in the recording head 20, the digital audio signal and the digital video signal can be recorded only by continuously supplying the recording signal after the scanning of the magnetic tape 6 is started. It can be simplified.

On the other hand, in the reproduction mode, the digital video tape recorder 5 obtains a reproduction signal from the reproduction head 21 preceding the recording head 20 and demodulates this reproduction signal to generate reproduction data DPB. In the reproduced data DPB, a sync word is detected by a sync detection circuit 23, and an error correction code of an inner code is detected by the error correction circuit 24, which is based on the sync word, and an error correction process is performed by the error correction code. To be done.

Further, in the subsequent deshuffling circuit 25, an identification code of the reproduced data DPB is detected with reference to the sync word, and deshuffling processing is performed with the identification code as a reference, and the reproduction data DPB is separated into a digital audio signal and a digital video signal. To be done.

Of these, the digital video signal is subjected to error correction processing by the error correction code of the outer code in the error correction circuit 26, digital signal processing in the digital signal processing circuit 14, and then the digital-analog conversion circuit 2.
At 8, it is converted into an analog signal and output. On the other hand, the digital audio signal is subjected to error correction processing by the error correction code of the outer code in the error correction circuit 27,
After the digital signal processing circuit 9 processes the digital signal, the digital-analog conversion circuit 29 converts the signal into an analog signal and outputs the analog signal.

Thus, the reproduction data DPB can be processed with the identification code as a reference, and the digital audio signal and the digital video signal mixedly recorded in one recording track can be correctly reproduced. Playhead 2
With respect to No. 1, the digital audio signal and the digital video signal can be reproduced only by taking in the reproduced signal at the timing of scanning the magnetic tape 6, whereby the timing control of the reproducing head 21 can be simplified.

On the other hand, in the edit mode, among the digital audio signals and digital video signals reproduced through the preceding reproducing head 21, the digital signals other than the one to be edited are the digital signal processing circuits 9 and 1.
4 is directly output to the digital signal processing circuits 8 and 13 and is output to the error correction coding circuits 10 and 15 together with the digital signal subjected to the editing processing.

The digital signals output from these error correction coding circuits 10 and 15 are shuffled after being added with error correction codes, identification codes, etc., as in the case of the recording mode. It is recorded on the magnetic tape 6 by the head 20. As a result, in edit mode,
The digital audio signal and the digital video signal are re-recorded for each recording track so that the same editing process as in the conventional digital video tape recorder can be performed. At this time, the recording head 20 and the reproducing head 21 are arranged.
The timing control of is simplified.

The recorded data can be refreshed each time the data is edited.
Can be degaussed.

According to the above configuration, after the identification code is added to the digital audio signal and the digital video signal, the shuffling is performed and the recording is performed so that the digital audio signal and the digital video signal are mixed in one recording track. Thus, the edit gap can be omitted and the double recording of the digital audio signal can be omitted. Therefore, the recording density can be improved correspondingly, and a digital audio signal and a digital video signal can be recorded using a magnetic tape having a low recording density.

Further, compared with the conventional digital video tape recorder, the timing control of the recording head and the reproducing head can be simplified, and the entire structure can be simplified accordingly. Further, the recorded data can be refreshed each time the data is edited, and the magnetic tape running system can be demagnetized.

In the above embodiment, the case where a plurality of pairs of recording heads and reproducing heads are mounted on the rotary drum has been described, but the present invention is not limited to this, and these recording heads and reproducing heads may be used as necessary. The number of heads can be freely selected.

Further, in the above-mentioned embodiment, the case where the 4-channel digital audio signal is recorded has been described, but the present invention is not limited to this, and the number of channels of this digital audio signal can be freely selected.

Further, in the above-mentioned embodiments, the case where the audio signal and the video signal are inputted / outputted in the form of the analog signal has been described. It can be widely applied.

Further, in the above-mentioned embodiment, the case where the present invention is applied to the digital video tape recorder having the editing function has been described, but the present invention is not limited to this.
It can be widely applied to video tape recorders that have no recording function, only recording function, and reproduction function.

Further, in the above-mentioned embodiment, the case where the present invention is applied to the digital video tape recorder to record and reproduce the digital audio signal and the digital video signal has been described, but the present invention is not limited to this, and the data storage, It can be widely applied to recording digital signals of a plurality of channels on a magnetic tape such as a digital audio tape recorder.

[0071]

As described above, according to the present invention, after the error correction code and the identification code are respectively added to the digital signals of a plurality of channels, the shuffling process is performed and the data is recorded on the magnetic tape to form the void. Digital signals can be recorded without the need for double recording. As a result, the recording density can be improved and the timing control of the magnetic head can be simplified. As a result, the recording density can be improved with a simple structure.

[Brief description of drawings]

FIG. 1 is a block diagram showing a digital video tape recorder according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing the recording format of FIG.

FIG. 3 is a schematic diagram showing a recording format of a conventional digital video tape recorder.

FIG. 4 is a schematic diagram showing a detailed structure of the audio sector of FIG.

[Explanation of symbols]

1, 6 Magnetic tape 5 Digital video tape recorder 10, 15, 18 Error correction coding circuit 11, 16 ID addition circuit 17 Shuffling circuit 20 Recording head 21 Playback head 24, 26, 27 Error correction circuit 25 Deshuffling circuit

Claims (4)

[Claims] 1. An error correction coding circuit for adding an error correction code to a digital signal of a plurality of channels in a prescribed block unit, and each channel is identified to the digital signal of a plurality of channels in the block unit. An identification code adding circuit for adding an identification code, and shuffling the digital signals of the plurality of channels to which the error correction code and the identification code are added,
A shuffling circuit for generating a recording data string in which the blocks of the plurality of channels are sequentially continuous in a prescribed order, and a scanning locus of a magnetic head is formed on a magnetic tape in a diagonal manner, and the recording data string is recorded on the scanning locus. A magnetic recording device comprising a magnetic tape recording system. 2. The magnetic recording apparatus according to claim 1, wherein the digital signals of the plurality of channels are a digital video signal and a digital audio signal. 3. An error correction coding circuit for adding an error correction code to a digital signal of a plurality of channels in a prescribed block unit, and each channel is identified in a block unit to the digital signal of the plurality of channels. An identification code adding circuit for adding the identification code, a shuffling process of the digital signals of the plurality of channels to which the error correction code and the identification code are added, and the blocks of the plurality of channels are successively recorded in a prescribed order. A shuffling circuit for generating a data string, a recording head, and a scanning locus of a reproducing head preceding the recording head are sequentially formed obliquely on a magnetic tape, and the recording data string is recorded on the scanning locus of the recording head. A magnetic tape recording / reproducing system and a reproduction data obtained from the reproducing head are deshuffled. A deshuffling circuit that outputs the reproduced data for each channel based on the identification code, and an error correction circuit that performs error correction processing on the output data of the deshuffling circuit to output digital signals of the plurality of channels. When re-recording at least one channel of the digital signals of the plurality of channels recorded on the magnetic tape,
Regarding the digital signals of the remaining channels, the digital signal output from the error correction circuit is input to the error correction coding circuit, and is recorded again on the scanning locus scanned by the reproducing head by the recording head. Magnetic recording / reproducing device. 4. The magnetic recording / reproducing apparatus according to claim 3, wherein the digital signals of the plurality of channels are a digital video signal and a digital audio signal.