JPH08287619A - Digital signal recording and reproducing device - Google Patents

Abstract

PURPOSE: To simplify the constitution of a digital signal recording and reproducing device by arranging signal information of video and sound every editing unit and performing error correction encoding and interleaving processing in common. CONSTITUTION: The right channel and left channel signals of video signal sound are stored in 1st to 3rd storage circuits 1 to 3 respectively. Product codes for error correction, consisting of internal and external codes are generated in each frame consisting of, for instance, video signals of 28 tracks and sound signals of 2 tracks by an encoder 4, and are stored in the storage circuits 1 to 3 respectively. An information amt. consisting of, for instance, 28 tracks×6 sectors of the video signal information and 2 tracks×6 sectors of the sound signal information is processed to be interleaved by an interleaving circuit 5, and sent in a sector unit to recording signal processing circuits 6 and 8. Two pairs of combination heads consisting of different azimuth heads respectively are dealt with by the recording signal processing circuits 6 and 8, and prescribed track patterns are formed on a magnetic tape via recording amplifiers 7 and 9.

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 apparatus, which performs error correction and interleave processing using a common code / combiner regardless of the content of a signal to be recorded or reproduced, and further The present invention relates to a digital signal recording / reproducing apparatus which records information about the interleaved information.

[0002]

2. Description of the Related Art When a digital signal which is binary information of "0" and "1" is recorded on a magnetic recording medium such as a magnetic tape and is reproduced, thermal noise of a recording / reproducing amplifier, dust on the magnetic tape, The signal actually recorded may be erroneously reproduced due to the influence of dust or the like. For example, a signal recorded as "0" may be reproduced as "1". Therefore, error correction is performed to detect and correct a code error occurring in such a recording / reproducing process. This error correction is performed by adding a redundant part (referred to as a parity check part) to signal information to be recorded / reproduced (referred to as a data part or an information part) to form regularity.
When a code error of data occurs in the recording / reproducing process described above, this is detected and corrected.

Generally, in error correction of a digital signal, FIG.
As shown in 0, with respect to the digital signal data of k1 × k2 bits, the inner code (Inner) of (n2 −k2) × n1 bits and (n
1-k1) × n2 bits outer code (Outer) is provided, and by combining this inner code and outer code (this combination is called product code), random error of digital signal (missing of uncorrelated data, etc.) ) And burst errors (such as missing correlated data).

Further, when recording a digital signal, if the flow of the signal is recorded as it is, a dropout of the signal may occur due to a dropout of the recording tape or noise during transmission, and a continuous signal may be collectively lost. . Therefore, interleaving is performed to rearrange continuous digital data by a predetermined method. By this interleaving, continuous digital data is recorded in a dispersed manner, so that the loss of a signal due to the above-mentioned dropout or noise is also recorded in a dispersed manner, so that it is not greatly damaged.

Then, digital recording / reproducing for recording / reproducing a digital signal composed of a video / audio information signal or the like on a magnetic recording medium such as a magnetic tape by using an error correction code or an interleave in which these inner code and outer code are combined. A device (digital VTR) has been developed and announced. In such a digital VTR, a rotary head is used to form and record a predetermined track pattern of a magnetic tape. An area for recording video signal information and an area for recording audio signal information were formed in each track pattern.

[0006]

[Problems to be Solved by the Invention] Such a digital VT
In R, especially when the contents of the digital signal to be recorded and reproduced are video signal information and audio signal information, the information amount of the video signal is much larger than the information amount of the audio signal, and each signal information is error resistant. Is different. For this reason, a signal processing means and a different interleaving processing means for respectively performing dedicated error correction on the video signal information and the audio signal information are required. That is, there is a problem that the circuit configuration becomes complicated.

In addition, since the video signal information and the audio signal information are recorded and reproduced in the digital VTR, fixed error correction and interleave processing are performed as the recording and reproducing system. However, the use of the digital recording / reproducing apparatus as an apparatus for recording / reproducing computer data is also drawing attention. In this case, optimal interleaving processing is required depending on the target of the recording / reproducing data and the scale of the recording / reproducing apparatus (size of memory for signal processing). For this reason, the interleave processing in which the recording / reproducing system is fixed is not sufficient, and it is desired to have a configuration compatible with various interleave processing.

Further, one digital recording / reproducing apparatus is
There has also been a demand for a dual-purpose digital recording / reproducing apparatus that also functions as a digital VTR for recording / reproducing video signal information and audio signal information and as a data streamer device for recording / reproducing computer data.

[0009]

In order to solve the above problems, the present invention provides a digital signal recording / reproducing apparatus having the following configuration.

First, in a digital signal recording apparatus for recording an input digital signal while forming a predetermined track pattern on a magnetic tape using a rotary head, the input digital signal is stored as signal information of a predetermined editing unit. Storage means for reading the signal information stored in the storage means, generating an error correction code for each predetermined unit of the signal information, and storing the error correction code in the storage means; Interleaving means for reading out the signal information stored in the means and performing interleaving according to the predetermined editing unit; and for performing a predetermined signal recording processing on the error-corrected / interleaved signal information to generate a recording signal. , The signal recording means for recording the recording signal on the magnetic tape, wherein the input digital signal is a video signal and an audio signal. A signal information consisting of items, and t successive tracks on a magnetic tape (t is a natural number) as one editing unit mentioned above to the image signal is continuous (t-
p) track, the audio signal is a continuous p track (p
Is recorded as a natural number, p <t), the encoding unit generates an error correction code for each information unit common to both the video signal and the audio signal, and the interleave unit information common to both the video signal and the audio signal. Provided is a digital signal recording device characterized by performing interleaving for each unit number.

In the structure according to the first aspect, the audio signal information is collected for each editing unit, the amount of information to be processed is increased, and the video signal information and the audio signal information are subjected to common error correction and interleave processing. it can.

Secondly, in a digital signal recording apparatus for recording an input digital signal while forming a predetermined track pattern on a magnetic tape by using a rotary head, the input digital signal is stored as signal information of a predetermined editing unit. Storage means for reading the signal information stored in the storage means, generating an error correction code for each predetermined unit of the signal information, and storing the error correction code in the storage means; Interleaving means for reading out the signal information stored in the means and performing interleaving according to the predetermined editing unit; and for performing a predetermined signal recording processing on the error-corrected / interleaved signal information to generate a recording signal. , This recording signal is recorded on the magnetic tape, and the interleave information performed on the signal information is used as a subcode. Providing digital signal recording apparatus characterized by comprising a signal recording means for recording the tracks on the magnetic tape.

With the structure according to the fourth aspect, various interleaving processing can be performed on the input digital signal according to a predetermined editing unit, and can be recorded together with the interleave information in each predetermined editing unit.

Thirdly, in the case where the input digital signal is signal information consisting of a video signal and an audio signal, the video signal is used as one editing unit in the continuous t tracks (t is a natural number) on the magnetic tape. Continuous (tp) tracks, the audio signal is a continuous p track (p is a natural number,
Even if the input digital signal is signal information consisting of data other than a video signal and an audio signal, it is recorded in a continuous t track (t is a natural number) on the magnetic tape as one editing unit described above. The digital signal recording apparatus according to claim 4 or 5, wherein the recording is performed.

In the structure described in claim 7, even if the input digital signal is a video signal and an audio signal, or data other than the video signal and the audio signal, t tracks (t is a natural number) which are similarly continuous on the magnetic tape. Is recorded in one edit unit.

[0016]

1 is a block diagram for explaining the present digital signal recording device, FIG. 2 is a diagram showing a track pattern recorded by the digital signal recording device, and FIG.
6 is a diagram showing an example of an interleave pattern recorded by a digital signal recording device, FIG. 7 is a diagram for explaining a track format, FIG. 8 is a block diagram for explaining the present digital signal reproducing device, and FIG. 9 is It is a principal part block diagram for demonstrating a digital signal recording / reproducing apparatus.

First, as an input digital signal, video /
An embodiment for recording audio signal information will be described.
The present digital signal recording device performs signal processing and records video / audio signal information for each editing unit. The video includes, for example, video signal information of m frames / field (m is a natural number).
One edit unit is used as audio, and audio signal information of n channels (n is a natural number) corresponding to the video information of m frames / fields described above is used as one edit unit.

The video / audio signal information of one editing unit is recorded on continuous t tracks (t is a natural number, eg, 30 tracks) on the magnetic tape, and the video signal information is continuous (tp). Track (eg 28 consecutive
Track), and audio signal information is recorded on consecutive p tracks (p is a natural number, p <t, for example, two consecutive tracks). In this way, since the audio signal information is collected for each editing unit, the amount of information to be processed becomes large, and as described later, it is possible to perform common error correction and interleave processing on video / audio signal information. Furthermore, since the audio signal information is collected for each editing unit to form an independent track, audio signal processing such as post-recording can be easily performed.

As shown in FIG. 1, among the above-mentioned input digital signals, the video signal information is the first storage means 1, the R (right) channel component of the audio signal information is the second storage means 2, and the L is the same. The (left) channel components are supplied to the third storage means 3, respectively.

In the first to third storage means 1, 2 and 3, the error generated by the encoder 4 to be described later in the above-mentioned editing unit for the signal information consisting of the supplied video signal information and audio signal information. Store with correction code. At this time this first
The third storage means 1, 2 and 3 have a storage capacity capable of storing at least video signal information and audio signal information corresponding to the above-mentioned editing unit.

Once the first to third storage means 1, 2 and 3 store the above-mentioned signal information, the encoder 4 is set to the first to the third.
The signal information stored in each of the storage means 1, 2 and 3 is read out to generate an inner code and an outer code in sector units. The inner code and the outer code at this time are not special error correction codes, but are, for example, the inner code and the outer code described in the prior art, which are composed of a sufficient number of bits to correct the signal information for each sector. Then, the encoder 4 outputs the product code of the inner code and the outer code.

Here, the above-mentioned sector is, for example, a predetermined number of bit units (information units) set for recording / reproducing continuous digital signals. The above-mentioned encoder 4 generates the above-mentioned product code for each sector, so that the common encoder 4 is used to read the video signals from the first to third storage means 1, 2 and 3, respectively. A common error correction code is generated for digital signals having different contents of information and voice signal information.

The error correction code generated by the encoder 4 is supplied to and stored in the first to third storage means 1, 2, and 3. The signal information and the error correction code stored in the first to third storage means 1, 2 and 3 are read out by the address control from the interleave circuit 5 and supplied to the interleave circuit 5.

The interleave circuit 5 arranges a predetermined number of sector-unit digital information consisting of signal information and error correction codes stored in the first to third storage means 1, 2 and 3 according to a predetermined condition. The so-called interleaving process is performed. The interleave processing and the error correction code generation processing are not limited to this processing order, and the interleave processing and the outer code generation may be performed simultaneously.

Further, the interleave circuit 5 divides the interleaved signals into a plurality of systems at the same time in accordance with the setting (number of heads, type, etc.) of the rotary head for directly recording the recording signal on the magnetic tape. It is supplied to recording signal processing circuits 6 and 8 which will be described later in units of sectors.

As in the track pattern shown in FIG. 2 which will be described later, the interleave circuit 5 outputs, for example, video signal information.
28 tracks x 6 sectors, audio signal information 2 tracks x 6
The information amount corresponding to the sector (total information amount of 30 tracks × 6 sectors) is output to two systems for every two tracks.

Further, the interleave selection circuit (recording system) 17R supplies the interleave information regarding the rearrangement performed by the interleave circuit 5 to the recording signal processing circuits 6 and 8 as a recording signal 17b. Then, as shown in FIG. 2 described later, this interleave information is recorded as a subcode of each track on the magnetic tape.

In the recording signal processing circuits 6 and 8, the video / audio signal information supplied from the interleave circuit 5 and the interleave information supplied from the interleave selection circuit (recording system) 17R are modulated by a modulation means (not shown), It is supplied to the recording amplifiers 7 and 9. The recording amplifiers 7 and 9 amplify the recording signal to a predetermined level and then supply it to the rotary heads (10A, 10B, 10A ', 10B').

At this time, the rotary heads 10A, 10A 'and the rotary heads 10B, 10B' have the same azimuth angle, and the rotary heads 10A, 10B and the rotary heads 10A ', 10B' have different azimuth angles. It constitutes a combination head. The rotary heads 10A, 10B, 10A'10B 'record the supplied recording signals while forming a predetermined track pattern on the magnetic tape.

Then, as shown in the track pattern of FIG. 2, for example, the combination heads 10A and 10B form track signals of two systems on track No. 0,
No. 1 is simultaneously recorded, and the combination heads 10A 'and 10B' simultaneously record two systems of recording signals on tracks No. 2, No. 3 in accordance with the rotation of a rotary drum (not shown). In this way, the above-mentioned combination head sequentially records the signal information.

At this time, for example, track Nos. 0 to No. 27
Up to 28 consecutive tracks, the above-mentioned video signal information is continuously recorded, and on two consecutive tracks of tracks No. 28, No. 29, audio signal information is continuously recorded. Further, the interleave information is recorded in the subcode at the head of each track on the magnetic tape.

By recording the video signal information and the audio signal information in separate tracks on the magnetic tape as described above, it becomes possible to independently edit the respective signal information later.

Further, among all tracks, for example, sector No. 3
An edit gap is provided between the sector No. 2 and the sector No. 2. This edit gap is a gap provided so that video signal information or audio signal information can be edited more finely and independently, and sector No. 0 to No. 2 and sector No. 3 to No. 5 are separated. Can be edited.

Thus, according to the present digital signal recording apparatus described above, the common information amount (common sector) described above is used.
Since it becomes possible to record the video signal information and the audio signal information on the magnetic tape, a common error correction code is used. As a result, the common encoder 4 can be used for the video signal information and the audio signal information, and the configuration of the device is simplified.

Further, if the interleaving is performed for each sector unit number (each information unit number) that is common to both the video signal information and the audio signal information, the configuration of the interleave circuit 5 becomes simple. Hereinafter, a specific interleaving method will be sequentially described with reference to FIGS. 3 and 4.

The track patterns shown in FIGS. 3 and 4 are recorded in V sectors (V is a natural number), for example, 6 sectors on 28 continuous tracks, as in the case of FIG. 2 described above. The audio signal information is recorded in two consecutive tracks in U sectors (U is a natural number), for example, two L / R channels in two tracks, and each channel is recorded in six sectors.

At this time, the interleave means (5)
Is configured to perform interleaving of k sector units between k (k is a natural number) tracks whose common divisors are U and V. In the above example, V = 6, U = 6 and k = 6.
However, since the number of interleaving units is preferably long, interleaving is performed between six sectors in units of k = 6, which is the greatest common divisor.

In this way, if the interleaving is performed for each number of information units common to both the video signal information and the audio signal information, for example, the above-mentioned 6-sector unit, the structure of the interleave circuit 5 becomes simple.

FIG. 3 shows an example of a specific interleave pattern, which is an example processed by the interleave circuit (5) described above. Editing unit is 28 tracks / 6
For video signal information which is information for one sector, for example, information in units of 6 sectors that are continuous is a track on a magnetic tape.
No.0, sector No.5 to track No.1,2, ... 5, sector N
o.4, 3, ... Interleave sequentially as recorded in 0. When performing interleaving from track No. 24 and sector No. 5, continue interleaving from track No. 27, sector No. 2 to track No. 0, sector No. 1.

That is, the video signal information recorded on the magnetic tape is in a state in which the continuous information is rearranged into information signals in which the tracks are deviated for each sector (along the arrow in FIG. 3). 0-5).

In this way, by applying the above-mentioned interleaving to the video signal information by this editing unit, this video signal information can be recorded in 28 tracks × 6 sectors on the magnetic tape.

At this time, the audio signal information is L / R 2
If there is a channel, for example, information in units of 6 sectors for the R channel is, for example, track No. 28, sector No. 5 to track No. 29, sector No. 4 → track No. 4 on the magnetic tape. 28, sector No.3 → track No.29
, Sector No.5 → Track No.28, Sector No.4 → Track No9, Sector No.3 are sequentially interleaved so that they are recorded. For the L channel, the above-mentioned interleaving is performed so as to be recorded in the track Nos. 28 and 29 and the sector Nos. 0 to 2 with the above-mentioned edit gap as a boundary.

As described above, since the audio signal information is separately recorded on the two channels with the editing gap as a boundary, for example, after that, another audio signal information is post-recorded (recorded in an overlapping manner) on each channel of the audio signal information. be able to.

As the interleave pattern described above, for example, the method shown in FIG. 4 may be used.
That is, continuous video signal information is recorded in sector No. 5, track N
o.0, 1, 2, ... 27 are sequentially interleaved in units of 6 sectors, and one of the R or L channels of audio signal information is track No. 28, 29, sector No. 5 to sector No. 5 on the magnetic tape. Interleave so that it is recorded up to No. 3 (along arrow in Fig. 4). Interleaving is performed so that the other channel is recorded on the magnetic tape from track No. 28, 29, sector No. 2 to sector No. 0 (along the arrow in the figure) on the other side of the edit gap.

Another specific example of the audio signal information will be described. In the examples of FIGS. 3 and 4 described above, the audio signal information is an example of two L / R channels, and each channel has an information amount of 6 sectors. This is a case where, for example, a digital audio signal having a sampling frequency of 48 kHz and a data bit number of 16 bits has two channels.

On the other hand, for example, the sampling frequency
If the digital audio signal of 32 kHz and the number of data bits is 12 channels, it is processed and recorded as follows. In this case, each channel of the audio signal information has 3 sectors.
Then, since V = 6 and U = 3, the common divisor k = 3, and as shown in FIG. 5, interleaving is performed between three sectors. According to this structure, the video / audio signal information can be processed with a common interleaving number, and editing can be performed for each of the four channels.

Although it is impossible to edit each of the four channels, the two channels are grouped together to form two channels as a whole, and each of the channels is composed of six sectors. By doing this, the L / R of 2
Processing similar to that of the channel embodiment (FIGS. 3 and 4 described above) is possible.

By the way, as shown in FIGS. 3 to 5, the continuous video / audio signal information is divided into predetermined tracks and sectors on a sector-by-sector basis by the above-described interleaving, and rearranged so that the magnetic information is generated. Recorded on tape. Then, when the signal thus recorded is reproduced later, it is necessary to rearrange the rearranged information in sector units. That is, by performing deinterleaving opposite to the above-described interleaving, the information signals rearranged at the time of recording are rearranged at the time of reproduction to reproduce the original information signals.

Therefore, by adding information indicating what kind of interleaving was performed at the time of recording to the recording signal as a subcode (additional information), it is determined what kind of deinterleaving should be performed at the time of reproducing.

In the present digital signal recording apparatus, as described above, at the time of recording, the interleave information concerning the interleave processing (for example, the number of interleaved sectors, the interleave pattern, etc.) is generated by the interleave selection circuit 17R, and is recorded on the magnetic tape. Recorded on each track. During reproduction, the reproduction signal processing circuit having a configuration complementary to the above-described recording signal processing circuits 6 and 8 detects this interleave information, so that the signals reproduced in discontinuous order for each sector are made continuous. It is configured to perform deinterleaving to reorder the information signals. Next, the interleave information recorded in each track on the magnetic tape will be described with reference to FIG.

As shown in FIG. 7, various information signals are recorded on the tracks formed on the magnetic tape in addition to the signal information to be recorded. For example, in order to edit video / audio signal information and the like, an amble (amble: a preamble at the beginning of the track and a postamble at the end of the track) provided with a special code group is provided so that they can be independently recorded.
Further, information such as identification information (ID) and synchronization signal information (Sync) is added to each sector in which video / audio signal information is recorded. Thus, the information signal recorded in the same track can reproduce the synchronous clock for each sector, and the above-mentioned editing can be performed.

Further, after the preamble provided at the head of the track, ATF information for controlling the tracking of the rotary head at the time of reproduction, and further, a subcode is provided via the amble. In this subcode,
Additional information such as the above-mentioned interleave information (the number of interleaved sectors, an interleave pattern, etc.) is recorded.

The interleave information is composed of, for example, 2-bit information (x, y) in the subcode. This information bit is generated and added by the interleave selection circuit 17R. For example, the interleave information (0,0) is used for the interleave pattern of the video signal information in units of 6 sectors shown in FIG. 3, and the interleave information is used for the interleave pattern of the audio signal information in units of 6 sectors shown in FIG. Let it be (1,0). Then, for example, for the interleave pattern of the video signal information in units of 6 sectors shown in FIG. 4, the interleave information (0, 1) is set,
Interleave information (1,1) is used for the interleave pattern of the audio signal information in units of 6 sectors shown in FIG.

At the time of reproduction, the interleaving performed by the interleaving circuit 5 is discriminated based on this information bit, and the reproduced signal is rearranged into the original information signal array by selecting deinterleaving complementary to this. it can.

In the case where the interleave pattern is fixedly used in all the recording / reproducing apparatuses, it suffices to be able to distinguish whether the interleave pattern is the video signal information track or the audio signal information track.
In this case, the interleave information and the other additional information for discriminating the tracks of the video / audio signal information can be shared (substitute).

However, when the interleave pattern is used differently for each recording / reproducing apparatus (fixed for each recording / reproducing apparatus), it is necessary to correctly reproduce the magnetic tape having another interleave pattern. In this case, as described above, the interleave selection circuit 17R
Interleave information (recording signal 17b) is generated by and is recorded on the track of the magnetic tape.

Further, the recording / reproducing apparatus may be constructed so that a plurality of interleave patterns can be selected according to the data to be recorded. In this case, the interleave selection circuit 17R automatically selects the optimum interleave number and interleave pattern according to the data to be recorded, and supplies it as the selection signal 17a to the interleave circuit 5 to perform the selected interleave processing. . At this time also, the interleave selection circuit 17R generates the selectively executed interleave information (recording signal 17b) and records it on the track of the magnetic tape.

Next, the digital signal reproducing apparatus will be described. The original digital signal is reproduced from the magnetic tape on which the digital signal is recorded by the digital signal recording device described above, by using the digital signal reproducing device having a configuration complementary to the digital signal recording device.

As shown in FIG. 8, the digital signal reproducing apparatus includes a reproducing amplifier 11 for amplifying the signals reproduced from the above rotary heads 10A, 10B, 10A ', 10B' to a predetermined level.
13, reproduction signal processing circuits 12 and 14 that demodulate the reproduction signals output from the reproduction amplifiers 11 and 13 and output reproduction digital signals, and deinterleave the reproduction digital signals output from the reproduction signal processing circuits 12 and 14 The original digital signal is applied to the above-mentioned first to third storage means 1 ',
The deinterleave circuit 15 to be supplied to 2'and 3 ', the inner code of the digital signal rearranged by the deinterleave circuit 15,
And a decoder 16 for decoding the outer code to correct the signal error.

Further, it comprises a (de) interleave selection circuit (reproduction system) 17P for instructing the deinterleave circuit 15 on the basis of the interleave information output from the reproduction signal processing circuits 12 and 14.

At the time of reproduction, the reproduction signal processing circuit 1
Reference numerals 2 and 14 reproduce the above interleave information from the subcode added to the reproduction signal, and supply this information to the interleave selection circuit 17P as the reproduction signal 17c. The interleave selection circuit 17P includes the interleave information (reproduction information) reproduced by the reproduction signal processing circuits 12 and 14.
17c), so that the deinterleave processing complementary to the interleave circuit 5 described above is performed.
d is supplied to the deinterleave circuit 15. The selection signal 17d is for instructing a deinterleaving method for converting the reproduced signal into the original digital signal.

In this way, the deinterleave circuit 15 described above deinterleaves the reproduction signals supplied from the reproduction signal processing circuits 12 and 14 based on the selection signal 17d supplied from the interleave selection circuit 17P, and the original continuous information is reproduced. The reproduced digital signals rearranged as
It is supplied to the third storage means 1 ', 2', 3 '. The reproduced digital signals stored in the first to third storage means 1 ', 2', 3'are decompressed by the decompressor 19 into the inner code and the outer code added to the input digital signal at the time of recording, and the reproduced digital signals are reproduced. Performs signal error correction. The reproduced digital signal subjected to error correction is the first
~ Output from the third storage means 1 ', 2', 3'to a transmission line (not shown).

Further, a digital signal recording / reproducing apparatus as shown in FIG. 9 may be constructed from the digital signal recording apparatus shown in FIG. 1 and the digital signal reproducing apparatus shown in FIG.
In such a recording / reproducing apparatus, the encoder 4 and the decoder 1
6, interleave circuit 5 and de-interleave circuit 1
5 and 5 have complementary structures, respectively, and common storage means 1,
2,3 (1 ', 2', 3 ') are shared during recording and playback.

Although the input digital signal described above includes the video signal information and the audio signal information, the case where arbitrary digital signal information is supplied to the present digital signal recording apparatus is described. The form will be described below.

In the present digital signal recording apparatus, the signal information is recorded as one editing unit, regardless of the contents of the input digital signal, that is, even in the case of signal information consisting of data other than the video signal and the audio signal, the signal information is recorded. Recording is performed on continuous t tracks (t is a natural number) on the magnetic tape. This is a case of using as a data streamer device for recording / reproducing computer data.

In this case, like the track pane shown in FIG. 6A, digital signal information is recorded so that one editing unit is 30 tracks and each track has 6 sectors.
In other words, tracks No.0 to No.29, sectors on the magnetic tape
Recording is performed from No. 5 to No. 0, and interleaving in units of 6 sectors is performed over 30 tracks in the direction of the arrow in the figure.

In this way, with 30 tracks as one editing unit, an error correction code consisting of an inner code and an outer code is generated in the same sector as the above-mentioned video signal and audio signal, and a common interleave process is performed for recording. To do. Then, with the configuration shown in FIG. 1 (and FIG. 8), the encoder 4, the interleave circuit 5, and the like can be shared by supplying data to the storage means 1, 2, 3. As a result, it is possible to realize a dual-purpose digital recording / reproducing device having a simple configuration, which functions as a digital VTR for recording / reproducing video signal information and audio signal information and also as a data streamer device for recording / reproducing computer data.

At this time, the interleave shown in FIG. 6A uses the interleave of the video signal information described in FIG. However, for example, the above-described interleaving of audio signal information, that is, interleaving may be sequentially performed in units of 2 tracks and 6 sectors on the magnetic tape, and the interleaving of the video signal information and the audio signal information described in FIG. You may use it. Then, in any case, the information on the interleave that has been selected is used as the interleave information at the time of recording,
It is recorded in the subcode of each track, and complementary deinterleave processing is performed according to this interleave information during reproduction. As the interleave information, information bits corresponding to the number of interleave patterns are prepared.

It is also possible to generate an error correction code composed of an inner code and an outer code in the same sector as that of the above-mentioned video signal and audio signal, and make only the number of sectors common for interleaving processing. That is, as shown in FIG.
When recording data, set 6 tracks as one editing unit,
Interleaving is performed in units of 6 sectors over 6 tracks. With this configuration, the encoder and the interleave processing circuit can be used, the memory capacity required for the interleave processing is reduced (6 tracks are enough), and a dedicated digital recording device that functions as a data streamer device can be provided. It can be realized with a simple configuration.

[0070]

As described above, according to the configuration of the present invention, the audio signal information is collected for each editing unit, the amount of information to be processed is increased, and the error correction in which the video signal information and the audio signal information are common is performed. Can be interleaved. Therefore, even if the digital signal has different signal information such as video signal information and audio signal information, the error correction code can be generated by the same encoding means, and thus the digital signal recording device with a simple configuration. There is an effect that can be realized.

Further, according to the configuration of the present invention, it is possible to interleave the input digital signal according to a predetermined editing unit and record it together with the interleave information in each predetermined editing unit. Therefore, it is possible to perform the optimal interleave processing depending on the target of the recording / reproducing data and the scale of the recording / reproducing apparatus (size of the memory capacity for signal processing), and not only video / audio signal information but also various data such as computer data. Can be digitally recorded.

Further, even if the input digital signal is a video signal and an audio signal, data other than the video signal and the audio signal are similarly processed in continuous t tracks (t is a natural number) on the magnetic tape in one editing unit. Will be recorded. Therefore, the generation of the error correction code and the interleave processing can be made common regardless of the input digital signal, and the digital V
A dual-purpose digital recording / reproducing device that functions as a TR or a data streamer device can be easily configured.

[Brief description of drawings]

FIG. 1 is a block diagram for explaining the present digital signal recording device.

FIG. 2 is a diagram showing a track pattern recorded by a digital signal recording device.

FIG. 3 is a diagram showing an example of an interleave pattern recorded by a digital signal recording device.

FIG. 4 is a diagram showing an example of an interleave pattern recorded by a digital signal recording device.

FIG. 5 is a diagram showing an example of an interleave pattern recorded by a digital signal recording device.

FIG. 6 is a diagram showing an example of an interleave pattern recorded by a digital signal recording device.

FIG. 7 is a diagram for explaining a track format.

FIG. 8 is a block diagram for explaining the present digital signal reproducing device.

FIG. 9 is a principal block diagram for explaining a digital signal recording / reproducing device.

FIG. 10 is a diagram for explaining a general error correction code.

[Explanation of symbols]

 1, 2, 3 ... Storage means, 4 ... Encoding means, 5 ... Interleave means, 6, 8 ... Recording signal processing circuit, 7, 9 ... Recording amplifier, 10A, 10B, 10A ', 10B' ... Rotating head, 17R ... interleave selection circuit (recording system), 17P ... interleave selection circuit (reproduction system).

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location G11B 20/18 572 9558-5D G11B 20/18 572G

Claims (8)

[Claims] 1. A digital signal recording apparatus for recording an input digital signal while forming a predetermined track pattern on a magnetic tape using a rotary head, wherein the input digital signal is stored as signal information of a predetermined edit unit. Means for reading the signal information stored in the storage means, generating an error correction code for each predetermined unit for the signal information, and storing the error correction code in the storage means; The stored signal information is read out, interleave means for performing interleaving according to the predetermined editing unit, and a predetermined signal recording process is performed on the error-corrected / interleaved signal information to generate a recording signal. Signal recording means for recording a recording signal on the magnetic tape, wherein the input digital signal is a video signal and an audio signal. The video signal is a continuous (tp) track, and the audio signal is a continuous p track as one editing unit in the continuous t tracks (t is a natural number) on the magnetic tape. (P is a natural number, p <t), the encoding unit generates an error correction code for each information unit common to both the video signal and the audio signal, and the interleave unit common to both the video signal and the audio signal. A digital signal recording device, characterized in that interleaving is performed for each number of information units. 2. A digital signal recording apparatus for recording an input digital signal while forming a predetermined track pattern on a magnetic tape by using a rotary head, wherein the input digital signal is stored as signal information of a predetermined edit unit. Means for reading the signal information stored in the storage means, generating an error correction code for each predetermined unit for the signal information, and storing the error correction code in the storage means; The stored signal information is read out, interleave means for performing interleaving according to the predetermined editing unit, and a predetermined signal recording process is performed on the error-corrected / interleaved signal information to generate a recording signal. Signal recording means for recording a recording signal on the magnetic tape, wherein the input digital signal is a video signal and an audio signal. The video signal is a continuous (tp) track, and the audio signal is a continuous p track as one editing unit in the continuous t tracks (t is a natural number) on the magnetic tape. (P is a natural number, p <t), and the signal recording means records the interleave information performed on the video signal and the audio signal as a subcode on each track of the video signal and the audio signal. Digital signal recorder. 3. A video signal is recorded in V sectors (V is a natural number) on each track of continuous (tp) tracks, and an audio signal is recorded in continuous p tracks (p is a natural number, p <t).
The interleaving means performs interleaving in k sector unit numbers with U and V as a common divisor over t tracks so that each channel is recorded in U sectors (U is a natural number). The digital signal recording device according to claim 1. 4. A digital signal recording apparatus for recording an input digital signal while forming a predetermined track pattern on a magnetic tape by using a rotary head, wherein the input digital signal is stored as signal information of a predetermined edit unit. Means for reading the signal information stored in the storage means, generating an error correction code for each predetermined unit for the signal information, and storing the error correction code in the storage means; The stored signal information is read out, interleave means for performing interleaving according to the predetermined editing unit, and a predetermined signal recording process is performed on the error-corrected / interleaved signal information to generate a recording signal. The recording signal is recorded on the magnetic tape, and the interleaved information performed on the signal information is used as a sub-code. A digital signal recording device comprising a signal recording means for recording on each track on a tape. 5. A digital signal recording apparatus for recording an input digital signal while forming a predetermined track pattern on a magnetic tape by using a rotary head, wherein the input digital signal is stored as signal information of a predetermined edit unit. Means for reading the signal information stored in the storage means, generating an error correction code for each predetermined information unit for the signal information, and storing the error correction code in the storage means; Interleave selection means for selecting the interleave to be performed according to the predetermined editing unit, interleave means for reading the signal information stored in the storage means, and performing the selected interleave, and the error correction / interleave processing. A predetermined signal recording process is performed on the recorded signal information to generate a recording signal, and this recording signal is And records care tape, a digital signal recording apparatus characterized by comprising a signal recording means for recording the tracks on the magnetic tape interleaving information went to the signal information as sub-code. 6. The signal information is recorded on a continuous track on a magnetic tape as the one edit unit regardless of the contents of the input digital signal, and the interleaving means interleaves between the continuous tracks. The digital signal recording device according to claim 4 or 5, wherein 7. When the input digital signal is signal information consisting of a video signal and an audio signal, the video signal is continuous as one editing unit on the continuous t tracks (t is a natural number) on the magnetic tape. (T−p) tracks, the audio signal is a continuous p track (p is a natural number, p <t)
Even if the input digital signal is signal information composed of data other than a video signal and an audio signal, it is possible to record as one editing unit on continuous t tracks (t is a natural number) on the magnetic tape. Claim 4 or Claim 5 characterized
The digital signal recording device according to. 8. A digital signal reproducing apparatus for reproducing a recorded digital signal by forming a predetermined track pattern on a magnetic tape by using a rotary head, wherein a predetermined signal processing is performed on the recorded signal reproduced from the magnetic tape. Signal reproduction processing means for outputting signal information and outputting interleave information reproduced from each track as a subcode, storage means for storing the signal information output from the signal reproduction processing means, and the signal Interleave selection means for selecting deinterleave to be performed on the signal information based on the interleave information output from the reproduction processing means, deinterleave means for performing the selected deinterleave on the signal information, and deinterleave Error correction processing is performed on the signal information subjected to Digital signal reproducing apparatus characterized by comprising a Goka means.