JP3326636B2 - Digital video / audio signal recording / playback device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a digital video / audio signal recording / reproducing apparatus for encoding and recording / reproducing video and audio signals.

[0002]

2. Description of the Related Art Various apparatuses for encoding, recording, and reproducing image signals and audio signals have been implemented. In such an apparatus, when encoding and recording and reproducing an image signal and an audio signal, it is considered that data accompanying these signals is simultaneously recorded and reproduced. As such a device, for example, there is a DAT format audio signal recording / reproducing device.

That is, in this DAT device, in the main data area, 2 bits × 2 for each synchronization period.
An area (4 bits) ID area is provided. Using these IDs, recording / reproduction of data accompanying the signal of presence / absence of emphasis, sampling frequency, number of channels, quantization method, and the like is performed.

[0004] In such a DAT device,
At both ends of each track, so-called subcode areas are provided. Recording and reproduction of data accompanying the signal are also performed in these subcode areas. Here, eight blocks are recorded in one area for the data recorded in the subcode area.

[0005] Among them, in the even-numbered block, data is composed of 7 bytes and a parity of 1 byte, and at the time of reproduction, error correction is performed by the internal parity and the external main parity. In the odd-numbered block, the data is composed of 4 bytes, and the error is corrected only by the external main parity during reproduction.

That is, in this DAT device, the structure of the data recorded in the ID area in the main data area is different from the structure of the data recorded in the even and odd blocks of the subcode area. Therefore, when recording and reproducing data having different structures, it is necessary to have software for performing the processing for each of them, which complicates the processing.

Further, the timing of data at the time of recording / reproducing differs due to the difference in structure, and it is necessary to provide an extra memory such as a RAM for recording / reproducing. Furthermore, in the case of developing a new model, the software cannot be easily developed. The present application has been made in view of such a point.

[0008]

The problem to be solved is that since the data structure is different, the processing for recording and reproducing these data becomes complicated.

[0009]

First means according to the present invention SUMMARY OF THE INVENTION are punished for recording by encoding the image signal and audio signal
In the digital video and audio signal recording and reproducing apparatus having a processing means, during the recording format, the area of the accompanying data of the image signal recorded and reproduced simultaneously with the digital image signal
An area of ancillary data of an audio signal simultaneously recording and the digital audio signal, and the area of the auxiliary data is provided, the structure of the data in each area in the recording format is a common pack structure, the Processing by processing means
It has to perform management which is digital image and audio signal recording and reproducing apparatus according to claim.

A second means according to the present invention is such that a memory having an arbitrary data area is provided in a recording medium cassette, and the data structure of each area in the recording format and the memory has a common pack structure. A digital video / audio signal recording / reproducing apparatus according to the first means, characterized in that:

According to a third aspect of the present invention, in the above-mentioned recording format, an area in which data for taking a timing for reliably performing the after-recording is provided, an identification signal is added to this area, and the identification signal is added to the area. The digital video / audio signal recording / reproducing apparatus according to the first means, wherein the content of the data of the entire track is defined by the following.

According to a fourth aspect of the present invention, in the above-mentioned recording format, an area of ancillary data of an image signal recorded and reproduced simultaneously with the digital image signal and an audio signal of an audio signal recorded and reproduced simultaneously with the digital audio signal are provided. An area for accompanying data and an area for auxiliary data are provided, and an identification signal is added to each of the areas, and the contents of data in each of the areas are defined by the identification signals. A digital video / audio signal recording / reproducing apparatus according to a third aspect.

According to a fifth aspect of the present invention, there is provided a digital image / audio signal recording / reproducing apparatus having a processing unit for encoding and recording / reproducing an image signal and an audio signal. An area for ancillary data of an image signal that is recorded and reproduced at the same time as a signal, an area for ancillary data of an audio signal that is recorded and reproduced at the same time as the digital audio signal, and an area for auxiliary data are provided. Is provided, and the data in each area in the recording format and the memory is divided into a basic part and an additional part while being formed into a pack structure, and essential data is provided in the basic part, the above additional portions are found provided identification signal indicating the content of data, the contents of the data of the additional portions regulations in the identification signal So as to be, processed in the processing means
It has to perform a digital image and audio signal recording and reproducing apparatus according to claim.

According to a sixth aspect of the present invention, a basic portion of data of the area of the accompanying data of the image signal and the area of the accompanying data of the audio signal uses a plurality of heads, and the recording position on the recording medium is different. A digital video / audio signal recording / reproducing apparatus according to a fifth aspect, wherein the digital video / audio signal is recorded while being shifted from each other.

According to a seventh aspect of the present invention, there is provided a digital image / audio signal recording / reproducing apparatus having a processing unit for encoding and recording / reproducing an image signal and an audio signal. An area for ancillary data of an image signal that is recorded and reproduced at the same time as a signal, an area for ancillary data of an audio signal that is recorded and reproduced at the same time as the digital audio signal, and an area for auxiliary data are provided. A memory having
The data in each area in the recording format and the memory is formed in a pack structure and can be independently taken out and dubbed. When the error of the taken out data cannot be corrected during the dubbing, above as data which defines the contents of the data packs of each area is rewritten by dubbing to a value indicating no information
A digital video / audio signal recording / reproducing apparatus characterized in that processing is performed by a processing unit . According to the invention
Eighth means does not adopt a pack structure at the time of dubbing.
The data is also dubbed.
Data is replaced with the above value indicating no information
A digital video and audio signal according to the seventh means, characterized in that:
Signal recording and reproducing device.

[0016]

According to this, since the data structure of each area has a common pack structure, processing for recording and reproducing these data can be facilitated, and software development and other operations can be performed. Processing can also be performed easily.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Prior to the description of the present application, a recording format of a digital video / audio signal recording / reproducing apparatus to which the present invention is applied will be described.

FIG. 11A shows a recording format of one track. In this figure, margins are provided at both ends of the track. A timing block TS, an audio signal, an image signal, and a subcode for reliably performing the after-recording are recorded from the recording start end side inside the recording block. Note that a margin at the time of editing and a preamble and a postamble for preventing remaining unerased due to overwrite recording are provided between recording portions of each signal.

Further, B to E in FIG. 1 show the details of the structure of one synchronization block for each of the TS, audio signal, image signal, and subcode signals. Here, each signal has a common synchronization area, and a 2-byte (16-bit) synchronization data is followed by a 3-byte ID section [ID0, ID1, and IDP (parity)].

First, B in FIG. 1 shows details of the TS.
This figure shows the configuration of one synchronization block. That is, this synchronous block is composed of 6 bytes, and 1-byte dummy data is provided after the above-mentioned synchronous area. 53 synchronous blocks are combined to form a one-track TS.

A signal for servo (commonly called an ATF signal) is written in a burst manner over this area,
Or written on the entire track.

Next, C in the figure is an audio signal, and this figure shows the structure of one synchronization block. That is, this synchronization block is composed of 90 bytes. Then, after the above-mentioned synchronization area, 77 bytes of data and 8 bytes of C1
(Error correction code). As will be described later, 10 synchronous blocks are combined with C2 (error correction code) for 4 synchronous blocks to form an audio signal of one track.

Also, D in the figure is an image signal, and this figure shows the configuration of one synchronization block. That is, this synchronization block is composed of 90 bytes. Then, after the above-mentioned synchronization area, 77 bytes of data and 8 bytes of C1
(Error correction code). As will be described later, 135 synchronous blocks are combined with C2 (error correction code) for 11 synchronous blocks to form an image signal of one track.

Further, E in the figure is a subcode, and this figure shows the structure of one synchronization block. That is, this synchronization block is composed of 12 bytes. Then, after the above-mentioned synchronization area, 5 bytes of data and 2 bytes of C1
(Error correction code). As will be described later, 12 synchronous blocks are combined to form one track subcode.

Of these signals, the audio signal, the image signal, and the subcode are configured as follows in one track.

That is, the audio signal is shown in FIG.
As shown in A of FIG. 2, it is composed of 14 synchronous blocks,
Synchronous blocks of two sets of data (1 to 5, 10 to 10
14), a C2 code for four synchronization blocks is provided. Furthermore, the synchronization blocks (1-5, 10-10
At the end of 14), an area for 6-byte accompanying data is provided. In this area, as shown by B and C in the figure, application data is provided in the upper 4 bits of the first byte, followed by two data recording packs of 5 bytes each.

The area of the accompanying data is formed for one track as shown by B and C in FIG. B in the same figure shows the recording data by the A head, and C in the same figure shows the recording data by the B head. That is, two data recording packs of 5 bytes each are provided after the first byte in which the application data is provided in the upper 4 bits, and 20 data recording packs (0 to 19) are provided for each of the A and B heads. ) Is formed at a time.

Further, in the data recorded by the head A in FIG. 2B, basic data is provided in six packs corresponding to the first half synchronous blocks 1 to 3, and additional data is provided in the remaining 14 packs. Also, in the data recorded by the B head in FIG. 4C, basic data is provided in six packs corresponding to the latter half synchronous blocks 12 to 14, and additional data is provided in the remaining 14 packs. The reason why the basic data pack is written on each of the A and B heads is to prevent one-channel data loss due to the head clog, and to shift the recording position is to deal with so-called lateral scratches on the tape. To do that.

The above-mentioned image signal is composed of 135 synchronous blocks and C2 codes of 11 synchronous blocks as shown in FIG. Of the 135 synchronous blocks, 5 of them are 0 to 26 and 27
It is divided into buffering blocks. This buffering block is formed as shown in FIG.

In this buffering block, an area for accompanying data of 3 bytes is provided at the leading end of the data of each synchronous block. In this area, first, the first byte (QNO) is quantized data, that is, the lower 4 bits are the quantization level (Q number) and the remaining 4 bits.
Data indicating a quantization level switching point (switching point) is provided in a bit. Further, the second and third bytes (AUX0, 1) are divided into the first half and the second half of each of the 10 bytes for each buffering block, and data such as accompanying data, closed caption, and teletext are provided. .

FIG. 14A shows one track (27 buffering blocks) for the first five bytes.
The upper four bits of the second byte (AUX0) of the first synchronization block of each buffering block are provided with application data, the next one bit is a frame frequency (50/60), and the lower three bits are Bits are provided with signal type information such as standard / wide / HDTV. Teletext data is provided in the remaining four bytes of the first half (third byte (AUX1) of the first synchronization block to second byte (AUX0) of the third synchronization block).

Further, B and C in FIG.
3rd byte (AUX1) to 5 of synchronous block
The third byte (AUX1) of the third synchronization block indicates one track (27 buffering blocks), and the latter 5 bytes form a data recording pack. That is, 27 (0 to 26) data recording packs are formed for each of the A and B heads. B in the same figure shows the recording data by the A head, and C in the same figure shows the recording data by the B head.

In FIG. 3B, the basic data is provided in the six packs corresponding to the buffering blocks 0 to 5 on the leading end side, and the recording data by the A head is added to the 20 packs corresponding to the buffering blocks 6 to 25 in FIG. Is provided. On the other hand, in the data recorded by the head B in FIG. 4C, additional data is provided in 20 packs corresponding to the buffering blocks 0 to 19 on the leading end side, and basic data is stored in 6 packs corresponding to the buffering blocks 20 to 25. Provided.

[0034] Thus a pack of basic data A, are writing to each B head is for one channel data loss protection by the head clog, what Rashi not a <br/> the recording position This is to cope with a so-called tape lateral wound. The last 5 bytes of the last buffering block 26 are used as a teletext storage area for both the A and B heads. Therefore, there are 26 data recording packs per track.

Further, the above-mentioned sub-code is composed of 12 sub-code synchronization blocks 1 to 12 for one track as shown in FIG. Therefore, 12 packs are formed per track, with 5 bytes of data for each synchronous block as one pack. Furthermore, application data is provided in the upper 4 bits of the second byte ID1 of the ID portion of the synchronous blocks 1 and 7.

With respect to such a recording format, the digital video / audio signal recording / reproducing apparatus of the present invention
20 packs provided in the audio signal synchronization blocks 1 to 5 and 10 to 14, 26 packs provided in the second and third bytes of the image signal synchronization block, and sub-code synchronization blocks For a total of 58 packs per track of the 12 packs, the data has a common pack structure.

With such a pack structure, new data can be arbitrarily recorded in the future by newly defining a header (item data described later). Also, since the contents can be grasped by reading the header, the position of the pack can be set arbitrarily. In addition, since the presence or absence of error data can be expressed in pack units,
Malfunction can be prevented well.

That is, in the above-described apparatus, each pack is formed of 5 bytes. Therefore, as shown in FIG. 1, the first byte (PC0) of these five bytes is used as item data (ITEM) indicating the contents of the data. Further, a format of 4 bytes (PC1 to 4) following the item data is determined, and arbitrary data is provided according to the format.

In this pack structure, the item data is divided into upper and lower 4 bits, and the upper 4 bits are called a large item and the lower 4 bits are called a small item. The large item of the upper 4 bits is, for example, data indicating the use of the subsequent data. On the other hand, the lower 4 bits are, for example, data indicating the specific contents of the subsequent data.
Here, up to 16 large items can be provided.
In addition, a maximum of 16 small items can be provided for each of the large items.

The large item includes, for example, a control (0000) and a title (00) as shown in FIG.
01), chapter (0010), part (001)
1), program (0100), line (0101),
Image auxiliary data (0110), audio auxiliary data (011)
1) A soft mode (1111) is provided. The large items (1000) to (1110) are portions left for addition.

Therefore, first, the major items of the control (0000) include a tape ID (0000), a tape length (0001), a designated date of timer recording (0010), a start and end time of timer recording (0011), a text control. (1000), small items such as text (1001) are provided.

Here, in the pack of the small item of the tape ID (0000), data such as the type and characteristics of the tape and the tape manufacturer code are recorded as shown in FIG. 3A.
In the pack of small items having a tape length (0001), the length of the entire length of the tape or the converted value of the number of tracks of the entire length of the tape is recorded in binary as shown in FIG.

Further, a designated date for timer recording (0010)
In the small item pack, data of a designated date of timer recording is recorded as shown in C of FIG. In the small item pack at the start and end times (0011) of the timer recording, data of the start and end times of the timer recording are recorded as shown in D of FIG.

In the pack of small items of the text control (1000), character codes (JI) of text data such as title names to be recorded later are stored as shown in FIG.
S, shift JIS, etc.), format (whether rewritable, etc.),
The following number is the number of packs (P: 0) or the number of bytes (N:
The discrimination signal of 1) and data such as the number of packs or the number of bytes (two digits) of the recorded text data are recorded.

In the pack of small items of the text (1001), as shown in F of FIG.
Recorded byte by byte. This control (0000)
Are provided, for example, in 12 packs of each synchronization block of the subcode.

Next, the major items of the title (0001) include time code (0000), binary group (0001), total time (0010), remaining time (0011), text control (1000), text (1001), etc. Of small items are provided.

Here, in the pack of small items of the time code (0000), time code data of ** hour ** minute ** second ** frame is recorded as shown in FIG. Then, the business standard SMPTE / EBU system time code is adopted). The binary group (00
In the small item pack 01), time code data is recorded as a binary value as shown in FIG.

Further, in the pack of small items of the total time (0010), the total reproduction time of the recording is recorded as shown in FIG. The remaining time is also recorded in the small item pack of the remaining time (0011). Text control (1000), text (100
In the small item pack of 1), each data is recorded in the same manner as in E and F of FIG. The large item of the title (0001) is provided in, for example, 12 packs of each synchronization block of the subcode.

The large item of the chapter (0010) has a time code (0000) and a binary group (000) as in the case of the large item of the title (0001).
1), total time (0010), remaining time (001)
1), text control (1000), text (100)
Small items such as 1) are provided. This chapter (0
The large item (010) is provided in, for example, 12 packs of each synchronization block of the subcode.

Further, the large item of the part (0011) has the same time code (0000) and binary group (000) as the large item of the title (0001).
1), total time (0010), remaining time (001)
1), text control (1000), text (100)
Small items such as 1) are provided. This chapter (0
The large item (010) is provided in, for example, 12 packs of each synchronization block of the subcode.

The large item of the program ( 01 00) also has a time code (0000) and a binary group (000) like the large item of the title (0001).
1), total time (0010), remaining time (001)
1), text control (1000), text (100)
Small items such as 1) are provided. This chapter (0
The large item (010) is provided in, for example, 12 packs of each synchronization block of the subcode.

That is, these titles (0001),
The large items of the chapter (0010), the part (0011), and the program (0100) have the same configuration of the small items described above. Also, among these large items,
The title (0001) is common to so-called soft tapes and tapes to be recorded by individuals, and includes a chapter (001).
0) and part (0011) are dedicated to a soft tape, and the program (0100) is dedicated to a tape to be recorded by an individual.

The large items of the line (0101) include line control (0000), luminance (0001), and R-
Y (0010), BY (0011), R (010
Small items such as 1), G (0110), and B (0111) are provided.

That is, the large item of this line (0101) records data obtained by sampling data in the vertical blanking. Note that data in such vertical blanking is required to be faithfully reproduced in a recording / reproducing apparatus for business use.

In the small item pack of the line control (0000), data of the sampled horizontal period (four digits) and the sampling frequency are recorded as shown in FIG.

After the packing of the small items of the line control (0000), each small item [luminance (000
1), RY (0010), BY (0011), R
(0101), G (0110), and B (0111)] (not shown) are recorded. This line (010
The large item of 1) is provided, for example, in 12 packs of each synchronization block of the subcode.

The large items of the image auxiliary data (0110) include a recording time (0000), a binary group (0001), a recording date (0010), and a recording signal source (00).
11), text control (1000), text (100)
Small items such as 1) are provided.

Here, as shown in FIG. 6A, the pack of small items of the recording time (0000) includes ** hour ** minute **
The data of the recording time of the second ** frame is recorded. In the pack of small items of the binary group (0001), recording time data is recorded as a binary value as shown in FIG. Also, packs of small items on the recording date (0010) include time zone, day, week,
Data such as month and year is recorded.

In the pack of small items of the recording signal source (0010), data such as the recorded television channel number (two digits) and tuner type are recorded as shown in FIG. Furthermore, text control (1000),
In the pack of the small item of the text (1001), each data is recorded in the same manner as E and F in FIG. The large item of the image auxiliary data (0110) is provided, for example, in 52 packs provided in the second and third bytes of the image signal data.

Similarly to the large item of the image auxiliary data (0110), the large item of the audio auxiliary data (0111) has the recording time (0000) and the binary group (0
001), recording date (0010), recording signal source (001)
1), text control (1000), text (100)
Small items such as 1) are provided. The large item of the audio auxiliary data (0111) is provided in, for example, 40 packs provided in the second to sixth bytes of the data of the audio signal.

That is, these image auxiliary data (011
0), the large items of the audio auxiliary data (0111) have the same configuration of the small items described above. Among these small items, the small item of text control (1000) and text (1001) is the above-mentioned title (000).
It is common to large items such as 1).

[0062] More large item of the soft mode (1111), a manufacturer ID, such as shown in FIG. 7 (0000)
The following small items are open to each manufacturer. The large items of the soft mode (1111) are provided in 20 packs of audio signal data, 26 packs of image signal data, and 12 packs of subcodes.

However, in the large item of ( 1111), the small item of ( 1111) is set as item data indicating that there is no information in the pack which is common to the whole. That is, the first byte (PC0) is (11111111)
No pack has no information. As a result, there are 15 small items (0000) to (1110) provided for the large items in the soft mode (1111).

Accordingly, in the digital video / audio signal recording / reproducing apparatus described above, when recording arbitrary data, the item data corresponding to this data is stored in the first byte (P
C0). Then, 4 bytes (PC1 to PC1) followed by arbitrary data according to the format determined by the item data
4).

When reproducing the data of this pack, the item data provided in the first byte (PC0) is reproduced. Then, arbitrary data provided in the following 4 bytes (PC1 to 4) is reproduced according to the format determined by the item data.

Thus, in the above-described apparatus, since the data structure is a common pack structure, software for recording and reproducing such data can be shared, and the processing is simplified. In addition, since the timing at the time of recording and reproduction becomes constant, there is no need to provide an extra memory such as a RAM .
Further, in the case of developing a new model, the software can be easily developed.

Further, by adopting the pack structure, even if an error occurs during reproduction, for example, the next pack can be easily taken out. Therefore, a large amount of data is not destroyed due to propagation of an error.

Further, the structure of small items corresponding to each large item, for example, title (0001), chapter (0010), part (0011), program (01)
00) between large items (000)
0), the binary group (0001), the total time (0010), the remaining time (0011), the text control (1000), and the text (1001). Processing can be performed easily.

As described above, according to the above-described apparatus, since the data structure of each area has a common pack structure, processing for recording and reproducing such data can be facilitated, and software development can be performed. And other processes can be easily performed.

In the above-mentioned apparatus, the applicant of the present application mounts a circuit board provided with a memory IC on a cassette in which a recording medium is stored, and writes the memory IC into the memory IC when the cassette is mounted on the apparatus. It has been proposed to read recorded data to assist recording and reproduction (see Japanese Patent Application Nos. 4-165444 and 4-287875).

In this case, the data to be written into the memory IC is made common to the above-described pack structure as shown in FIG. 8, thereby facilitating the processing for writing and reading the data. .

That is, on this memory IC, first, the tape ID in the large item of the control (0000)
(0000) and a pack of small items of tape length (0001). Here, the item data (00000) indicated in the first byte (PC0) of the first pack
000) is also used as an identification code for the presence or absence of the memory IC. The second byte of the first pack (PC1)
Application data is provided in the upper 4 bits of.

Following this fixed pack, data such as TOC (table of contents) is written. However, when writing text into this memory IC, for example, the redundancy of data becomes high in the above-described pack structure. Therefore, in the small item (1000) of the text control described above, the discrimination signal of the pack number (P: 0) or the byte number (N: 1) is set to the byte number (N: 1),
Text data is written continuously after this pack.

As a result, data redundancy can be reduced. Text-controlled small items (1000)
In, the number of bytes of text data to be written continuously is determined, so that a break in the data can be easily detected. Therefore, for example, even when an error occurs during reproduction, the next pack can be easily taken out, and a large amount of data is not destroyed due to propagation of the error.

In this memory IC, the control (0000), the title (0001), the chapter (0010), the part (0
011), program (0100), line (010)
1) All large items such as image auxiliary data (0110), audio auxiliary data (0111), and soft mode (1111) can be written.

Further, in the above-mentioned device, the 3-byte ID portion [ID0, ID1, and IDP] is also added to the synchronization area of each signal after 2-byte (16-bit) synchronization data.
(Parity)].
Therefore, ID0 and ID1 of this ID part are shown in FIG.
The data structure is defined as shown in FIG.

That is, in the figure, the upper two bits of ID0 indicate the type, (11) indicates TS, (01) indicates an audio signal, (00) indicates an image signal, and (10) indicates a subcode.

A in the figure is the ID part of the TS,
A discrimination signal for standard recording (SP: 0) and long-time recording (LP: 1) is provided in the third bit of ID0. ID0
Are the application data, for example, in the case of a digital video / audio signal recording / reproducing apparatus, (0
000).

Therefore, when these 4 bits are other than (0000), the reproduced signals of the audio signal and the image signal are muted, and all the tracks are released, so that the state conforms to the contents of the application data.

The application data is the most important data in the signal. For this reason, this application data is provided with the same data repeatedly at 53 places in one track, and the detection error is minimized by using a majority decision or the like.

Further, the lower 6 bits of ID1 are used as a synchronization number in the track, and numbers 1 to 53 are provided for each of the above 53 synchronization blocks. The fourth bit of the other ID0 and the upper two bits of ID1 are portions left for addition.

[0094] In the figure, B is the ID portion of the audio signal, and the third bit of ID0 is provided with a frame identification signal. Further, track numbers (1 to 24) in the frame are provided in the lower 5 bits of ID0, and the lower 4 bits of ID1 are provided.
Bits are provided with synchronization numbers (1 to 14) in the track. The upper four bits of the other ID1 are portions left for addition.

In FIG. 11, C is an ID portion of the image signal. A frame identification signal is provided in the third bit of ID0. Further, the lower five bits of ID0 are provided with a track number (1 to 24) in the frame, and ID1 is provided with a synchronization number (1 to 147) in the track.

Further, D in the figure is an ID portion of the subcode, and a control identification signal is provided in a total of 10 bits including the lower 6 bits of ID0 and the upper 4 bits of ID1. The lower 4 bits of ID1 are provided with a synchronization number (1 to 12) in the track.

Therefore, in this device, the contents of the following area can be determined by determining the upper two bits of ID0 of the ID part of the synchronization area of each signal, and the following processing can be easily performed. .

In the ID portion of the TS, application data is provided in the lower 4 bits of ID0, and the content of the following track can be determined by determining the application data. Thus, for example, when the application data is (0000), the digital video / audio signal recording / reproducing apparatus can be immediately used, and the subsequent processing can be easily performed.

Further, in the above-described device, the audio signal 2
Each of the 0 packs, the 26 packs of image signals, and the packs to be written into the memory IC has a common pack structure, and has a leading end side (A head side).
And a predetermined number of packs on the rear end side (B head side) have fixed contents, and arbitrary contents are provided in other areas.

That is, as shown in FIG.
In the head, six packs of basic data on the front end side are fixed, and in the B head, six packs of basic data on the rear end side have fixed contents, and arbitrary contents are provided in packs in other additional data areas. In the case of the image signal, the A head uses six packs of basic data on the tip side as shown in FIG.
As shown in C of FIG. 4, six packs of the basic data on the rear end side have fixed contents, and arbitrary contents are provided in packs of other additional data areas.

In the subcode, the packs of the synchronization blocks 3, 4, 9, and 10 in FIG. 15 have fixed contents, and the other areas are areas for additional data. Arbitrary contents are provided in this pack. Alternatively, the subcode pack of a predetermined track in a plurality of tracks forming one frame may have fixed contents, and the subcode packs of other tracks may have arbitrary contents.
Further, as for the packs to be written in the memory IC, fixed contents such as variable-length TOC are provided after the above-mentioned two fixed packs, and arbitrary contents are provided thereafter.

Further, areas for recording arbitrary contents of the above-mentioned voice, image, and subcode are collected in the recording order of the heads within one frame, and are treated as one data structure.
In the case of a memory IC, it is originally gathered at one place. The arbitrary content includes a common content and a content unique to each manufacturer. Recording and writing are performed after the fixed contents and the common contents first. Then, after that, a pack of small items of the maker code (0000) of the large item in the above-mentioned soft mode (1111) is provided, followed by contents specific to each maker.

Therefore, when the pack of this maker code (0000) is determined, it is determined that the contents before that are common contents, and thereafter, the contents are unique to each maker. In some cases, one or both of the shared contents or the contents of the pack of the maker code (0000) and the contents unique to each maker do not exist.

As a result, the degree of freedom of the recorded or written contents of the pack recorded in the audio signal, the image signal, the subcode, and the pack written in the memory IC can be extremely increased. Therefore, the user or the manufacturer can easily record or write desired contents on these packs.

Further, in the above-described apparatus, application data is provided in the upper 4 bits of the first byte of the audio signal data, separately from the application data provided in the lower 4 bits of ID0 of the TS ID portion. Application data is provided in the upper 4 bits of the first byte of the data of the first synchronization block. 2 of the first pack written to the memory IC
Application data is also provided in the upper 4 bits of the third byte (PC1).

These application data indicate the content of each succeeding signal, and the content of the subsequent signal can be determined by determining this. Thus, for example, the application data is (0
000), the digital video / audio signal recording / reproducing apparatus can be immediately used, and the subsequent processing can be easily performed.

That is, these application data have a hierarchical structure. When the application data provided in the TS is (0000), the whole of the following track is determined as the digital video / audio signal recording / reproducing apparatus. . Thus, the positions of the synchronization areas of the audio signal, the image signal, and the subcode are determined.

Further, application data is provided for each of the audio signal, the image signal, and the subcode, and the form of each signal is determined by determining the application data. As a result, the subsequent processing can be easily performed.

Further, these application data are recorded ten times in one track in an audio signal and 27 times in one track in an image signal. This is the T
This is because the same data is repeatedly provided in one track, as in the case of the application data of S, so that detection errors are minimized by using a majority decision or the like.

In the case of an image signal, especially in a compression type recording / reproducing apparatus, processing is performed for each compression unit.
At the time of reproduction, data is reproduced for each compression unit. In this case, the one compression unit also includes the application data described above. Since this area is defined by the application data, one or more application data is necessarily required in one compression unit. .

In consideration of the variable speed reproduction, when the track is operated obliquely, the track may enter another application data area at any time, and therefore, it is necessary to ensure that one or more application data does not always exist in one compression unit. It may not be possible.

In the above-described apparatus, it is conceivable that so-called digital dubbing is performed on the audio signal and the image signal. In that case, for example, when the transmission data amount is considered to be the minimum in the case of the dripping method, the data to be actually transmitted includes, for example, ID0 and ID1 and a data portion, that is, a portion excluding the synchronous data 2 bytes, IDP, C1, and C2 parities. become.

At this time, it is meaningless to write on the tape that the data is an error. It is impossible to control the error just by increasing the number of children, grandchildren, and great-grandchildren, and data that should be error-free should be transmitted. If an error flag is additionally written, the tape format will be different.

[0102] Therefore, in the present invention utilizes no information item (11111111). That is, if an unreproducible error occurs in the data in the pack during reproduction, the item code there is set to (11111111). Since (111111111) indicates a pack without information, dubbing does not cause any problem.

That is, on the receiving side, if the item code (11
111111), it is easy to see that it is an error pack. When data exists in an area of an arbitrary content, an error pack can be identified from the context. That is, when data does not exist in an area of an arbitrary content, the item code (111111) is originally used.
There is no problem because 11) is included.

A circuit for realizing this need only have a DF / F of at most 5 bytes. FIG. 10 shows an example of the circuit. In the figure, data of 0 to 8 bits is input. This data is delayed by one pack by an 8-bit DF / F of 1, 2, 3, 4, and 5. The error that occurred during this time is input from 8 and sets 12 RSF / F. The 12 RSF / Fs are PC0 at the beginning of the pack.
Are supplied from the input 9 and are reset every pack by the differentiating circuits 11a and 11b.

On the other hand, the DF / F 13 with enable is enabled by the PC4 slot signal from the input 10, and the 5
The switches 6a and 6b are switched during the byte period. Therefore, when an error occurs, the switch 6b is enabled, and 8-bit data (11111111) is output from the output 7.

Furthermore, the item (1111) without this information
1111) will be described below.

First, the configuration of the ID section is as shown in FIG. Therefore, when an error that cannot be eliminated by ECC appears in ID0 and ID1, this ID
0 and ID1 are replaced with (11111111). This allows the receiving and reproducing side to recognize the error.

That is, in the configuration of the ID portion of each signal, for example, in the case of ID 0 of the TS, the value of the application data does not become (1111). Therefore (111111
Since the data of 11) does not exist, it can be recognized as an error. Others are the same.

Next, error processing of accompanying data that does not employ a pack structure will be described. First, in the accompanying data of the image signal, the first byte of the data of the first sync block of each buffering block is deleted when an error occurs (111
11111). The lower 4 bits of this 1 byte are application data, and these 4 bits do not take the value of (1111). Therefore (1111111
Since the data 1) does not exist, it can be recognized as an error.

The teletext (A in FIG. 14) stored in the accompanying data area of the image signal is basically left to the ECC capability of the external decoder, so that even if there is an error, the data is not replaced. Good.

Further, in the accompanying data of the audio signal,
The first byte of the 11-byte associated data area of each sync block is replaced at the time of error (11111111). The upper 4 bits of the first byte are application data, and these 4 bits do not take the value of (1111). Therefore, since there is no data of (11111111), it can be recognized as an error.

[0112] The data itself of the image signal and the audio signal is replaced with a unique error code.
For example, the image signal is DCT compression, the audio signal is 48 kHz.
In the digital recording / reproducing apparatus of the z, 16-bit sampling method, the image signal is replaced by a DC component 011111111 AC component 111101 audio signal 1111111111111111.

From the above, the item without information (111111)
By applying 11) to a pack structure and other than a pack structure, even in a digital dubbing method with a minimum circuit size such that data of image signals and audio signals is dubbed by dripping, the tape format can be easily changed. Can respond.

In order to realize the common pack structure of the present application, it is sufficient to provide at most one microcomputer, not shown. Its convenience and flexibility are as described above.

[0115]

According to the present invention, since the data structure of each area has a common pack structure, the processing for recording and reproducing these data can be facilitated, and the software can be developed. And other processes can be easily performed.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining an example of a pack of a digital video / audio signal recording / reproducing apparatus according to the present invention.

FIG. 2 is a diagram for explaining a large item.

FIG. 3 is a diagram for explaining a control pack.

FIG. 4 is a diagram for explaining a title pack;

FIG. 5 is a diagram for explaining a pack of lines.

FIG. 6 is a diagram for explaining an image assistance pack.

FIG. 7 is a diagram for explaining a pack in a soft mode.

FIG. 8 is a diagram for explaining a pack of a memory IC;

FIG. 9 is a diagram for explaining an ID part.

FIG. 10 is a configuration diagram of an example of a circuit that generates an item without information (11111111).

FIG. 11 is a diagram showing recording of one track and a format of each synchronization block.

FIG. 12 is a diagram showing the recording of audio signals and the format of a pack.

FIG. 13 is a diagram showing a recording format of an image signal.

FIG. 14 is a diagram showing a format of a pack of an image signal.

FIG. 15 is a diagram showing a recording format of a subcode.

[Explanation of symbols]

 PC0 Byte of item data constituting pack PC1 to PC4 Byte of data constituting pack

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI H04N 5/928 H04N 5/92 E (58) Field surveyed (Int.Cl. ⁷ , DB name) G11B 20/10-20 / 14 G11B 27/10-27/32 H04N 5/92

Claims (8)

(57) [Claims] 1. A digital video / audio signal recording / reproducing apparatus having a processing means for encoding and recording / reproducing an image signal and a voice signal, wherein, in a recording format, accompanying data of the video signal recorded / reproduced simultaneously with the digital video signal. Area, an area for ancillary data of an audio signal that is recorded and reproduced simultaneously with the digital audio signal, and an area for auxiliary data. The data structure of each area in the recording format has a common pack structure. To be processed by the above processing means.
Digital image and audio signal recording and reproducing apparatus being characterized in that the. 2. The recording medium cassette according to claim 1, wherein a memory having an arbitrary data area is provided in the recording medium cassette, and a data structure of each area in the recording format and the memory has a common pack structure. 2. The digital video / audio signal recording / reproducing apparatus according to 1. 3. An area is provided in the recording format, in which is recorded data for taking a timing for reliably performing post-recording, and an identification signal is added to the area. 2. The digital video / audio signal recording / reproducing apparatus according to claim 1, wherein the contents are defined. 4. An auxiliary data area of an image signal recorded and reproduced simultaneously with the digital image signal during the recording format, an auxiliary data area of an audio signal recorded and reproduced simultaneously with the digital audio signal, 4. A data area, wherein an identification signal is added to each of the areas, and the content of data in each of the areas is defined by the identification signals. Digital video and audio signal recording and playback device. 5. A digital video / audio signal recording / reproducing apparatus having a processing means for encoding and recording / reproducing an image signal and an audio signal, the data accompanying the digital image signal being recorded and reproduced simultaneously with the digital image signal during the recording format. And an area for auxiliary data of an audio signal that is recorded and reproduced simultaneously with the digital audio signal, and an area for auxiliary data, and a memory having an area for arbitrary data is provided. The data of each area in the memory is formed into a pack structure and divided into a basic part and an additional part. Essential data is provided in the basic part, and an identification signal indicating the content of the data is provided in the additional part. It is provided et <br/> is, as the content of the data of the additional portion is defined by the identification signal, the upper So as to perform the processing in the processing means
Digital image and audio signal recording and reproducing apparatus characterized by the. 6. A basic part of data of the area of the accompanying data of the image signal and the area of the accompanying data of the audio signal is recorded by using a plurality of heads and recording positions on a recording medium are shifted from each other. 6. The digital video / audio signal recording / reproducing apparatus according to claim 5, wherein: 7. A digital video / audio signal recording / reproducing apparatus having a processing unit for encoding and recording / reproducing an image signal and a voice signal, wherein the accompanying data of the video signal recorded and reproduced simultaneously with the digital video signal during the recording format. And an area for auxiliary data of an audio signal that is recorded and reproduced simultaneously with the digital audio signal, and an area for auxiliary data, and a memory having an area for arbitrary data is provided. The data in each area in the memory and in the memory are individually packed so that they can be independently extracted and dubbed. If the error of the extracted data cannot be corrected during the dubbing, the data in each area is data is rewritten to a value indicating no information is dubbed to define the contents of the data packs Digital image and audio signal recording and reproducing apparatus being characterized in that to perform the processing by the processing means so that. 8. A pack structure is not adopted at the time of dubbing.
The data is also dubbed.
Data is replaced with the above value indicating no information
8. The digital video and audio signal according to claim 7, wherein:
Recording and playback device.