JP3312374B2 - Video signal recording disk - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A Industrial field B Outline of the invention C Conventional technology (Fig. 8) D Problems to be solved by the invention E Means for solving the problems (Fig. 1) F function (Fig. 1) G Embodiment (G1) Configuration of Video Signal Recording Disk (FIGS. 1 to 3)
(G2) Configuration of video signal recording device and video signal reproduction device (FIGS. 4 and 5) (G3) Configuration of image data generation circuit (FIGS. 6 and 7)
(G4) Effects of the embodiment (FIGS. 1 to 3) (G5) Other embodiments Effects of the invention A Industrial application field The present invention relates to a video signal recording disk, for example, a disk such as a compact disk. The present invention is suitable when applied to a case where a digital video signal is highly efficiently encoded and recorded on a linear recording medium.

B. Summary of the Invention The present invention provides a video signal recording disk on which a digital video signal is encoded with high efficiency and records a frame group head information table, and continuously stores a plurality of frame group data over a recording sector. By recording, digital video signals can be recorded at a high density without impairing random accessibility.

C Prior Art Conventionally, a disk-shaped recording medium such as a compact disk has been proposed in which a video signal of a moving image is recorded as intra-frame encoded data and inter-frame encoded data obtained by highly efficient encoding.

As shown in FIG. 8, for example, at the time points t = t ₁ , t ₂ , t ₃ ,...
2, PC3,... Are digitally coded and, for example, when recorded on a compact disk, the digital data to be recorded is compressed by utilizing the point that the video signal has a feature of high autocorrelation. The recording efficiency is increased as a whole.

That is, the intra-frame encoding process is performed for the images PC1, PC2,
The PC3,... Are subjected to arithmetic processing for obtaining a difference between pixel data adjacent one-dimensionally or two-dimensionally along the horizontal scanning line direction, and thus each of the images PC1, PC2, PC3,.
.. Are recorded as compressed bit-number image data.

As shown in FIG. 8 (B), the inter-frame encoding process includes image data PC12, PC23,... Composed of a difference in pixel data between adjacent images PC1 and PC2, PC2 and PC3,.
The calculated, which is a record with the initial image PC1 at the time t = t _1.

Thus, digital data having a much smaller number of bits than in the case of recording all the pixel data of the images PC1, PC2, PC3,... Is encoded with high efficiency and recorded on a compact disc.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention By the way, such a disk-shaped recording medium for recording digital data encoded with high efficiency has a so-called sector (for example, 512 bytes in the case of a hard disk, ) Is defined, and the input data is always recorded and reproduced from the head of the sector, thereby enabling random access in sector units.

However, in this case, if the length of the input data is arbitrary, most of the input data ends in the middle of the sector, and meaningless data (so-called file bits) is recorded in the remaining portion. In the worst case, there is a problem that a recording area of almost one sector (512 bytes (= 4,096 bits)) is wasted at every break of input data.

In practice, to record an hour's worth of video images, 10,8
It is necessary to record digital data for 00 (= 30 frames × 3,600 seconds) frames. For example, assuming that an average of 256 bytes, which is half of one sector per frame, is wasted, a total recording area of 27 megabytes is required. Wasted, and the efficiency of disk use was still insufficient for practical use.

The present invention has been made in view of the above points, and has as its object to propose a video signal recording disc capable of recording digital video signals at a high density without impairing random accessibility.

E. Means for Solving the Problem In order to solve the problem, according to the present invention, a large number of recording tracks TR are formed on the surface of the disk-shaped recording medium 1 so as to be sequentially arranged in the radial direction. A video signal recording disk in which the surface of the recording medium 1 is divided into sectors having a predetermined angular range, and a video signal is recorded as recording data in a recording track portion belonging to each sector. A large number of tracks TR are formed so as to be sequentially arranged in the radial direction, and the surface of the disk-shaped recording medium 1 is sector SE having a predetermined angular range.
C is a video signal recording disk in which a video signal is recorded as recording data in a recording track portion TR belonging to each sector SEC, and the recording data is composed of a large number of frame group data GOF1, GOF2,. .., And each of the frame group data GOF1, GOF2...
A plurality of inter-frame encoded data DT2X, DT3X... Based on the intra-frame encoded data DT1X, and frame identification data FID attached to the intra-frame encoded data DT1X and the inter-frame encoded data DT2X, DT3X. Are recorded in the frame order along the recording track TR, and the sector number table TAG stores each frame group data GOF.
1, the sector number data indicating the sector number of the sector SEC in which the recording head position of GOF2 exists. When reproducing the video signal from the recording data, the sector number table 5
Can access the first recorded data of the frame group data GOF1, GOF2,.
Based on the frame identification data FID, the intra-frame code data DT included in each of the frame group data GOF1, GOF2,.
1X and the inter-frame encoded data DT2X, DT3X...

F function A frame group head information table HD is provided, and a plurality of frame group data GOF1, GOF2,.
Digital video signal without loss of random accessibility by recording continuously over
VD can be recorded at high density.

G Example Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

(G1) Embodiment of Video Signal Recording Disk In FIG. 1, reference numeral 1 denotes a compact disk to which the video signal recording disk according to the present invention is applied as a whole.
For example, a CD frame conforming to the CD standard is formed on a spirally formed recording track TR (FIG. 1 (A)).

As shown in FIG. 1 (B), this 1CD frame
CD frame synchronizing signal CD _SYNG consisting of channel bits, 1
Control data CD _CTL made in bytes, and is constituted by respectively 12 bytes length of the recording data unit CD _DT1 and CD _DT2 to 4 bytes long error correction code CD _ECC1 and CD _ECC2 is added.

Note that the control data CD _CTL , the recording data parts CD _DT1 and CD _DT2 and the error correction codes CD _ECC1 and CD
_ECC2 is EFM (eight to fourteen modulatio
n), one byte (= 8 bits) is recorded as one symbol of 14 bits, and a 3-bit margin bit is added to each symbol including the CD frame synchronization signal CD _SYNC . One CD frame is composed of 588 channel bits.

Also, the recording data section C for 96 CD frames
D _DT1 and CD _DT2 are, as shown in FIG.
It is used as a one-sector SEC that conforms to the XA standard.

This one sector SEC is a sector synchronization signal SEC consisting of 12 bytes.
_SYNC , 4-byte sector header SEC _HD , 8-byte sub-code SEC _SBC storing sector number from the beginning of recording track TR, 2,048-byte user data S
The EC _UDT consists of 280 bytes of sector header SEC _HD , subcode SEC _SBC, and auxiliary data SEC _ADT for error detection and correction of user data SEC _UDT .

Here, the video signal is, for example, as high-efficiency encoded data DT1X in which the first frame data is subjected to intra-frame encoding processing for every six frames, and the second to sixth frame data are inter-frame encoded by a predetermined method. High-efficiency encoded data DT2X to DT6X are processed and recorded on the compact disk 1 as high-efficiency encoded data DT2X to DT6X.
Constitutes one frame group GOF.

In the case of the compact disk 1, as shown in FIG. 1 (D), the user data SEC _UDT of each sector SEC is used continuously for all sectors, for example,
What sector SE is the start position of each frame group GOF from SEC
A header HD having a table indicating whether it is recorded in C is recorded, and subsequently, a highly efficient encoded video signal is recorded for each frame group GOF.

As shown in FIG. 2, the header section HD has a header size data HSZ, a total frame number data NFF, and a GOF frame number data N each having a word length of 32 bits and 1 word.
FG and GOs each having a word length equivalent to the number of GOF frames NFG
F encoding mode data PWG and GOF recording format data RFG, and 1-word sector number table length data N
It is composed of a TA and a sector number table TAG having a word length corresponding to the sector number table length data NTA.

Actually, the header size data HSZ, the total frame number data NFF, and the GOF frame number data NFG are respectively the header section H
The data length of D, the number of all recorded frames, and the number of frames in one frame group GOF (in this embodiment, the value is “6”).

Further, the GOF coding mode data PWG is stored in each frame group GO.
The high-efficiency encoding method for each frame in F is indicated by one word, and in this embodiment, for example, the value of the intra-frame encoding process is “0”, and the level 1 inter-frame encoding process including adaptive prediction encoding is The value “1” and the level 2 inter-frame encoding process are represented by the value “2”.

Further, the GOF recording format data RFG indicates the recording order of each frame in each frame group GOF for each word, and in this embodiment, for example, the sequential values “0”, “3”,
“1”, “2”, “4”, and “5” are recorded.

Furthermore, the word length of the sector number table TAG is recorded in the sector number table length data NTA, and in the subsequent sector number table TAG, the start position of the frame group GOF is sequentially recorded for each word from the start. The sector number is recorded.

Each frame group GOF following the header section HD is recorded in a format as shown in FIG.

That is, at the beginning of each frame group GOF, a GOF sync signal GOF _SYNC having a 20-bit length and having a bit pattern of, for example, "0000 0000 0000 0001 1111", and an input sequence number for each frame having a 16-bit length of 2 ¹⁶ Following the frame identification number FID represented by, the high efficiency encoded data DT1X corresponding to the first frame data is recorded.

Subsequently, each has a length of 20 bits, for example, "00
00 0000 0000 0001 0000 ", a frame synchronization signal FRM _SYNC having a bit pattern, a frame identification number FID and a second
-Highly efficient encoded data DT corresponding to the sixth frame data
2X to DT6X are sequentially recorded.

(G2) Configuration of Video Signal Recording Apparatus and Video Signal Reproducing Apparatus The compact disk 1 of this embodiment records image data which has been encoded by the video signal recording apparatus 2 with high efficiency as shown in FIG. The master master 3 is duplicated.

That is, in the video signal recording device 2, the video signal VD
Is input to the image data generating circuit 4 and, as a result, the high-efficiency encoded data DT for every six frames,
One frame group GOF including 1X and DT2X to DT6X is supplied to the image data recording processing circuit 5.

The image data recording processing circuit 5 blocks the input high-efficiency encoded data DT1X and DT2X to DT6X based on the sector format, and detects the sector number where the head of each frame group GOF is recorded. And heads HD
The sector number table TAG is formed.

Thus, the image data recording processing circuit 5 sends the head control circuit 6 a head control signal CNT _WHD for controlling the positioning of the optical head 7 at a predetermined position, and also outputs the head section HD.
And the recording signal S _{REC including the} above-described high-efficiency encoded data DT1X and DT2X to DT6X is transmitted to the optical head 7, and thus the video signal VD input to the master master 3 of the compact disc 1 is output. Is recorded with high efficiency encoding.

In addition, a plurality of compact disks 1 can be duplicated by creating a stamper from the master master 3 thus formed and molding the resin by a method such as the 2P method.

Thus, in the compact disk 1, a sector number table TAG of the header section HD is provided, and the input high-efficiency encoded data DT1X and DT2X to DT6X can be transmitted over a plurality of sectors SEC without adding a file bit or the like. By recording continuously, the recording area of the recording track can be used with an efficiency close to 100% in practical use.

On the other hand, the compact disk 1 copied as described above can be reproduced by a video signal reproducing device 10 as shown in FIG.

That is, the video signal reproducing device 10 firstly executes the image data reproduction processing circuit 11 prior to the reproduction of the compact disc 1.
Against head control circuit 12, the optical head 13 sends a head control signal CNT _RHD positioning the head sector SEC of the compact disc 1, the reproduction signal in S _PB obtained from this result the optical head 13, the header portion HD Is reproduced, and this is written in the memory 14 as header data DT _HD .

In this state, for example, when a fast-forward playback operation is specified by the user, the image data playback processing circuit 11 first refers to the sector number table TAG recorded in the memory 14 as the header data DT _HD , and sequentially reads one frame group. The head number for each GOF is detected, and a head control signal CNT _RHD for positioning the optical head 13 is transmitted to the sector SEC of the sector number.

Subsequently, the image data reproduction processing circuit 11
From in the reproduced signal S _PB sent from 13 sends out this by playing a high-efficiency encoded data DT1X corresponding to one frame of the frame group GOF to the image data decoding circuit (not shown), below Only the first frame of the successive frame group GOF is reproduced, and fast-forward reproduction is performed in this manner.

Further, for example, when a user specifies a reproduction operation of a predetermined frame, the image data reproduction processing circuit 11
Referring to the sector number table TAG recorded as the header data DT _HD in FIG. 14, the frame group GOF including the specified predetermined frame is detected, and the sector number in which the head position of the frame group GOF is recorded is detected. And sends the head control signal CNT _RHD for positioning the optical head 13 to the sector SEC of the sector number.

Then the image data reproduction processing circuit 11, from being reproduced signal S _PB sent from this result the optical head 13, a frame group GOF
DT1X to DT6X from the first frame to the predetermined frame designated by the user are reproduced and transmitted to an image data decoding circuit (not shown). Perform frame playback.

Thus, this compact disk 1 has a HD
By reading the sector number table TAG included in the above in advance and referring to this, random access can be easily performed.

(G3) Configuration of Image Data Generation Circuit In this embodiment, the image data generation circuit 4 in the video signal recording device 2 described above with reference to FIG.
It is composed of a circuit as shown in the figure.

Image data generating circuit 4 is stored temporarily in the transmission buffer memory 23 is quantized into high-efficiency encoded data D _VD in the video signal encoding circuit 22 the video signal VD, high-efficiency coding, which is temporarily stored in the transmission buffer memory 23 The data _DVD is read out as the transmission data _DTRAN at a predetermined transmission speed,
The data is transmitted to the image data recording processing circuit 5.

Here, the transmission buffer memory 23 stores the transmission data D at a transmission speed determined by the transmission capacity to the image data recording processing circuit 5.
At the same time sends a _TRANS, a remaining quantity data signal D _RM representing the amount of data is Zantsu the transmission buffer memory 23, is fed back to the video signal encoding circuit 22 via the feedback loop 26.

Thus the video signal encoding circuit 22, by controlling the quantization step at the time of digital encoding video signal VD, and controls the data amount of the high-efficiency encoded data D _VD supplied to the transmission buffer memory 23 Thus, the data held in the transmission buffer memory 23 is controlled so as not to overflow or underflow.

Here, as shown in FIG. 7, the video signal encoding circuit unit 22 receives the video signal VD in the preprocessing unit 31 and converts the luminance signal and the chroma signal included in the video signal VD into digital data. , One-field drop processing and one-field line thinning-out processing are converted into moving image data, and this is converted to 16 pixels (horizontal direction).
× 1 transmission unit block data S1 consisting of 16 lines of data
Converted to 1 and stored in the current frame memory 32.

Thus, the current frame memory 32 holds the frame image data of the frame to be currently transmitted, and this is supplied as the current frame data S12 to the subtraction circuit 33 as an addition input.

The previous frame data S13 obtained from the previous frame memory 34 is given to the subtraction circuit 33 as a subtraction input, whereby the transmission end block data of the current frame image data and the previous frame image data are output to the output terminal of the subtraction circuit 33. Deviation data S14 representing the deviation from the transmission unit block data is obtained, and this is converted into transform coded data S15 by a transform coding circuit 35 composed of, for example, a discrete cosine transform circuit, and then quantized by a quantization circuit 36. Become

Thus, the quantized data S1 obtained from the quantizing circuit 36
6 is again subjected to high-efficiency encoding in the variable-length encoding circuit 37, and the variable-length encoded data S17 is composited with the first and second management information S18 and S19 in the composite circuit 38, and then transmitted to the transmission buffer memory. Transmission image data S20 for 23
Supplied as

In addition, the quantized data S16 is inversely transformed by an inverse transform circuit 39 including an inverse quantization circuit and an inverse transform coding circuit, and is stored as decoded deviation data S21 in a previous frame memory 34 through an adder circuit 40. Thus, the previous frame memory 34 stores the current frame image data of the current frame transmitted to the transmission buffer memory 23 or the previous data.

On the other hand, the current frame data S12 of the current frame memory 32 is
The motion vector data is supplied to the motion compensating circuit 41 together with the previous frame data S22 of the previous frame memory 34, whereby the motion vector data of the transmission unit block of the image portion in which the motion has occurred from the previous frame image data in the current frame image data is obtained. S23 is formed and supplied to the previous frame memory 34 and supplied to the composite circuit 38 as the first management information S18, so that the motion vector data as a part of the header information of the data corresponding to the deviation data S14. S23 is sent to the transmission buffer memory 23.

Also, the quantization step data S24 representing the quantization step used in the quantization processing in the quantization circuit 36 is given to the variable length coding circuit 37 as a variable length condition signal and is combined as the second management information S19. The data is supplied to the conversion circuit 38 and is combined with the transmission image data S20 as a part of header information added to the data of the deviation data S14.

With such a configuration, the time point shown in FIG.
image data PC1 at t ₁ when to be transmitted as intraframe coded data, given a value "0" data as the frame data S13 before it is supplied to the subtraction circuit 33 (i.e., representing a blank image), which As a result, the current frame data S12 to be currently transmitted is
Is supplied to the conversion encoding circuit 35 as the deviation data S14 through.

At this time, the transform coding circuit 35 sends the transform coded data S15 obtained by intra-frame coding to the quantization circuit 36, and thus the intra-frame coded data is transmitted to the transmission buffer memory 23 as the transmission image data S20. At the same time as the transmission, the deviation data S14 and therefore the current frame data S
12 is decoded by the inverse conversion circuit 39 as decoded deviation data S21 and is stored in the previous frame memory.

Thus, after the image data PC1 is transmitted as intraframe coded data, at time t _2, the image data PC2
Is supplied to the subtraction circuit 33 as the current frame data S12, the image data PC1 is supplied to the subtraction circuit 33 as the image data of the previous frame from the previous frame memory 34, and as a result, the subtraction circuit 33 outputs the current frame data S12
The deviation data S14 corresponding to the image data PC12 representing the deviation between the image data PC2 as the image data and the image data PC1 as the previous frame data S13 is obtained.

This deviation data S14 is passed through a transform coding circuit 35 and a quantization circuit 36, and further passed through a variable length coding circuit 37 and a decoding circuit.
The data is sent to the transmission buffer memory 23 as transmission image data S20 through 38, and is also decoded by the inverse conversion circuit 39 and supplied to the addition circuit 40 as decoded deviation data S21.

At this time, the adder circuit 40 calculates an image corresponding to the deviation represented by the decoded deviation data S21 from the motion compensation circuit 41 with respect to the image data PC1 as the image of the previous frame held in the previous frame memory 34. The image data of the current frame is predicted based on the data of the previous frame, and is added to the position moved by the data S23.

At this time, the motion compensation circuit 41 stores the image data PC as the previous frame image data held in the previous frame memory 34.
1 and the motion vector data S23 representing the motion of the image data arriving as the current frame data S12, whereby the motion vector data S2 is stored in the previous frame memory 34.
The decoded deviation data S21 is added to the vector position represented by (3).
And the motion vector data S23 is transmitted as transmission image data S20 via the multiplexing circuit 38.

Thus, the video signal encoding circuit unit 22 calculates t = t ₂ (eighth
When the image data PC2 shown in FIG. 3A is transmitted, the image data PC1 of the previous frame is used as inter-frame encoded data.
Image data PC12 representing the deviation between the current frame image data PC2 and the current frame image data PC2 is supplied to the transmission buffer memory 23 after being highly efficiently coded into inter-frame coded data including the deviation data S14 and the motion vector data S23.

Hereinafter, similarly, when new image data arrives as current frame data S12 at time points t ₃ , t ₄ ,.
The image data of the previous frame held in the previous frame memory 34, that is, the current frame data S12 is highly efficiently encoded as inter-frame encoded data using the previous frame data S13, and transmitted to the transmission buffer memory 23. .

(G4) Effect of Embodiment According to the above configuration, of the high-efficiency encoded data DT1X and DT2X to DT6X recorded for each frame group GOF, the highly-efficient encoded data DT1X subjected to intra-frame encoding processing. Is recorded at the beginning, the GOF synchronization signal GOF
_In addition to adding _SYNC , for each frame group GOF, the header section HD that records the head number as the table TAG with the sector number at which the head position is recorded is recorded from the first sector SEC, and subsequently, a plurality of frame groups GOF are recorded in the recording sector SEC. , The compact disk 1 can be realized in which the use efficiency of the recording area can be remarkably improved without impairing the random accessibility of the disk.

(G5) Other Embodiments (1) In the above embodiment, one frame group GO
The position on the compact disk where the beginning of F was recorded,
Although the case where the table corresponding to the sector number is provided has been described, the head position of the frame group GOF may be represented by an absolute address on the compact disk instead.

In this case, as the compact disk 1, for example, 540
When image data is recorded on a CD-ROM having a recording capacity of megabytes, a word length of the table is required to be 32 bits for specifying an absolute address.

(2) In the above-described embodiment, a case has been described in which a table for recording the head positions of all the frame groups GOF by sector numbers is provided on one table. However, the present invention is not limited to this. The entire data is divided into several areas, and the main table that stores the recording position of the first frame group GOF of each area at, for example, an absolute address on a disk, and the recording position of the frame group GOF in each area is stored in the area. A table having various hierarchical structures may be provided, such as providing a sub-table for storing at a relative address of.

In this case, at the time of recording and reproduction, calculation processing such as adding the absolute address of the main table and the relative address of the sub-table is necessary to calculate the position of the frame group GOF. Since the recording area of the table and the sub-table can be shortened, the recording area of the disk can be more effectively used as a whole.

In this case as well, considering the case where image data is recorded on a CD-ROM in the same manner as described above, the word length of the main table is specified as an absolute address, so that 32 bits are required, and the sub-table uses the sector number as a relative value. Since the address is specified, the word length changes depending on how many frame groups GOF are included in each divided area.

For example, 512 bytes per disk sector,
Assuming that random access of every six frames is allowed for image data that has been encoded at a high efficiency of about 30 [Kbps] per frame, random access is allowed once for approximately 45 sectors on an actual disk. If the word length of the sub-table is 8 bits, five frame groups GOF can be designated in one sub-table. If the word length is 16 bits, the frame group GOF up to 1456 can be specified in one sub-table.
Can be specified.

(3) In the above embodiment, the case where the sector number table is recorded from the beginning of the recording track on the compact disk has been described. However, the position of the table is not limited to this, and the recording side and the reproducing side can synchronize. By doing so, the same effect as in the above-described embodiment can be realized at any position such as the middle or end of the disk.

(4) Further, in the above-described embodiment, a case has been described in which image data encoded with high efficiency is recorded on a compact disc as a video signal recording disc. However, the present invention is not limited to this, and it is not limited to this. It is widely applicable and suitable for recording highly efficient encoded image data on a disk-shaped recording medium.

H Effects of the Invention As described above, according to the present invention, a sector number table having sector number data indicating a sector number of a sector in which a recording head position of each frame group data exists is recorded in a recording track, and a plurality of frames are recorded. Video signal recording that enables high-density recording of digital video signals without impairing random accessibility using sectors of a disk-shaped recording medium by continuously recording group data even across sectors. A disk can be realized.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of a video signal recording disk according to the present invention, FIG. 2 is a schematic diagram showing the structure of a header section, and FIG. 3 is a schematic line showing the structure of frame group data. FIG. 4 is a block diagram showing a configuration of a video signal recording apparatus for producing a master master of a video signal recording disk. FIG. 5 is a block diagram showing a configuration of a video signal reproducing apparatus for reproducing a video signal recording disc. 6 and 7 are block diagrams showing an image data generating circuit in the video signal recording apparatus, and FIG. 8 is a schematic diagram for explaining the high efficiency coding processing. 1 ... Compact disk, 2 ... Video signal recording device,
3 ... master master, 4 ... image data generation circuit, 5 ...
Image data recording processing circuit, 6, 12, ... head control circuit,
7, 13 ... head, 14 ... memory.

Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 5/76-5/781 H04N 5/91-5/956 G11B 20/12

Claims (1)

(57) [Claims] 1. A large number of recording tracks are formed on the surface of a disk-shaped recording medium so as to be sequentially arranged in the radial direction, and the surface of the disk-shaped recording medium is divided into sectors having a predetermined angular range. A video signal recording disk in which a video signal is recorded as recording data in the recording track portion belonging to each sector, wherein the recording data has a large number of frame group data and a sector number table; The group data is respectively attached to at least one intra-frame encoded data, a plurality of inter-frame encoded data based on the intra-frame encoded data, the intra-frame encoded data and the inter-frame encoded data. Frame identification data, and are recorded in frame order along the recording track; The table has sector number data indicating a sector number of a sector in which a recording head position of each of the frame group data is present. When reproducing the video signal from the recording data, the sector number data is recorded in the sector number table. The first record data of the frame group data can be accessed by the sector number, and the intra-frame coded data and the inter-frame coded data included in each frame group data are identified based on the frame identification data. A video signal recording disk characterized in that it can be used.