JP3375616B2 - Optical disc, recording method and recording device - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an optical disc and an optical disc .
The present invention relates to a disc recording method and a recording device .

[0002]

2. Description of the Related Art FIG. 13 is a block circuit diagram of a conventional optical disk recording / reproducing apparatus disclosed in Japanese Patent Application Laid-Open No. 4-114369. Reference numeral 1 denotes an A / A for converting a video signal, an audio signal or the like into digital information. D converter, 2 is information compression means, 3 is frame sector conversion means for converting the compression information into sector information equal to an integral multiple of a frame period, 4
Is an encoder, 5 is a modulator for converting into a predetermined modulation code in order to reduce inter-code interference in the recording medium, 6 is a laser drive circuit for modulating laser light according to the modulation code, and 7 is a laser output switch. Is.

Further, 8 is an optical head for emitting the laser beam, 9 is an actuator for tracking the light beam emitted from the optical head 8, 10 is a traverse motor for sending the optical head 8, and 11 is Optical disc 1
A disk motor for rotating the motor 2, a motor drive circuit 19 and a motor control circuit 20. Further, 13 is a reproduction amplifier for amplifying the reproduction signal from the optical head 8,
Reference numeral 14 is a demodulator for obtaining data from the recorded modulated signal, 15 is a decoder, 16 is a frame sector inverse transforming means, 17 is information decompressing means for decompressing the compressed information, and 18 is decompressed information. For example, it is a D / A converter for converting into an analog video signal or an audio signal.

FIG. 14 shows a moving picture standardized for compressing digital moving picture information and transmitting / storing it.
icture coding Experts Group (hereinafter "MPE
This is a simplified representation of the data array structure (layer structure) of the “G”) method. In the figure, 21 is a Group of Picture (hereinafter, referred to as "G
OP ”), 22 is a GOP layer composed of several pictures (screens), 23 is a slice obtained by dividing one screen into several blocks, 24 is a slice layer composed of several macroblocks, 25 Is a microblock layer, and 26 is a block layer composed of 8 pixels × 8 pixels.

In the MPEG system, for example, the microblock layer 25 has a minimum coding unit of 8 × 8.
This block is composed of pixels, and this block is a discrete cosine transform (hereinafter referred to as "DC
"T"). At this time, adjacent 4
One Y signal block, one Cb block positionally corresponding to these Y signal blocks, and one Cr block, totaling six blocks, are called macroblocks. A slice is formed by collecting a plurality of these macroblocks. A macroblock is the minimum unit of motion compensation prediction, and a motion vector for motion compensation prediction is performed in macroblock units.

FIG. 15 is a diagram showing an encoding structure when 17 screens are 1 GOP. In the figure, 27 is an I-picture 28 which is video information for performing intra-frame DCT.
Is B-picture, which is image information by DCT encoding for motion compensation in the forward direction, and 29 is the above-mentioned I-picture and P-picture, which are temporally located before and after.
Is a P-picture in which DCT coding is performed with motion compensation as a reference screen. Further, FIG. 16 is a diagram showing an encoding structure when 10 screens are set to 1 GOP.
FIG. 7 is a diagram showing an encoding structure when 15 screens are 1 GOP.

Next, the conventional operation will be described with reference to the drawings.
As the compression technique of digital video information advances, the above-mentioned compression information is recorded on the optical disc, so that the conventional VTR
It is possible to realize a video filing apparatus which has excellent searchability and is extremely easy to use as compared with a tape medium represented by the above. Further, since such a disk file device handles digital information, there is no dubbing deterioration as compared with the case of recording an analog video signal, and since it is an optical recording / reproducing system, a non-contact and highly reliable system can be realized.

Conventionally, when recording such compressed moving image information on an optical disc, an optical disc recorder as shown in the block diagram of FIG.
Digitally compressed moving image information such as that of the EG system is recorded. At this time, the video information digitized by the A / D converter 1 is processed by the information compression means 2 into, for example, MP.
It is converted to a standard compressed moving image method such as the EG method. This compressed information is encoded and modulated to reduce the influence of intersymbol interference on the disc,
Recorded in. At this time, for example, the amount of data in each GOP unit is set to be approximately the same amount, and the GOP is divided into sectors equal to an integral multiple of the frame period to
It is clear that editing etc. is possible in units.

During reproduction, the optical disk 12
The video information recorded in is amplified by the reproduction amplifier 13,
After being restored to digital data by the demodulator 14 and the decoder 15, it is restored as pure video original data by removing the data such as address and parity by the frame sector inverse conversion means 16. Further, the information decompression means 17 reproduces it as a video signal by performing MPEG decoding, for example.
The / A converter 18 enables display on a monitor or the like.

As described above, when the MPEG method is used as the digital moving picture compression method, the method from the 15th to FIG.
As shown in FIG. 7, compression I-p by intra-frame DCT
picture 27, B-picture 28 which is video information by DCT coding for forward motion compensation, and DCT coding with motion compensation using the above-mentioned I-picture and P-picture located temporally before and after as a reference screen. The P-picture 29 for which the above-mentioned procedure is performed records the coding structure, which is a combination of some, in the disc as it is.

At this time, since the I-picture is performing the intra-frame DCT, it is possible to reproduce the image by this information alone, but the P-picture is performing the motion compensation in the forward direction. I-pictur
The image can be reproduced only after reproducing e. In addition, since B-picture is a prediction screen from both directions, the above-mentioned I-picture or P in front and behind
-The feature is that the picture cannot be reproduced until after the picture is reproduced. In this case, naturally, the B-picture that is performing bidirectional prediction has the smallest amount of data,
Good coding efficiency.

However, since this B-picture cannot be reproduced by itself, it is I-picture or P-picture.
Although re is required, there is a problem that if the number of B-pictures is increased by that much, the amount of buffer memory in the processing circuit increases and the delay time from data input to video reproduction increases. However, in storage media typified by optical discs and the like, an encoding method with good compression efficiency is desired for long-term recording, and the delay time of video reproduction does not pose a problem, so that FIGS. The encoding method as shown in is suitable.

Next, when the data having such an encoding structure is recorded on the disc, how the image retrieval and the high speed reproduction are performed is as follows. FIG. 17
In the case of having an encoding structure as shown in
High-speed reproduction is possible if reproduction is performed in units of e. in this case,
Immediately after playing the I-picture, a track jump is performed to access the next or previous GOP, where the I-picture is played. By repeating such an operation, in the case of FIG.
In No. 6, high-speed feed reproduction and return reproduction can be realized in which the feed speed is limited to an integral multiple of 10 times.

However, in the actual image retrieval, if it is too fast, it will be difficult for the human eye to recognize it, and in order to confirm almost an image scene, the above-mentioned high-speed retrieval of 10 times or more is appropriate. In the case of searching for a detailed video point after performing the scene search of, it is necessary to perform fast-forward and reverse playback at several times speed. Therefore, it is clear that a wide range of special reproduction from several tens of times to several times of speed is required for effective video retrieval. However, in practice, for example, when the compressed data of the MPEG system is used, the P-pict in the coding structure of FIGS.
If you try to play ure, you will end up with B-
The picture was also reproduced, and it was actually difficult to realize 4 to 8 times speed.

[0015]

Since the conventional reproducing method is a method for reproducing the above-described coding structure as it is on the disc, when performing special reproduction, the I-pic is used.
It could be reproduced only in true units. Therefore 1 GO
Fast-forwarding or rewinding was only possible at a speed corresponding to the number of frames contained in P or an integral multiple thereof.

Further, in the digital video recording format shown in the conventional example, I-picture, P
Since the sequences of -picture and B-picture are arranged in order on the time axis, the special reproduction method is as follows.
The method is limited to the following.

Particularly, in the conventional system for recording a digital moving image, the most basic special reproduction method is a special reproduction method using the information recorded in the TOC area at the innermost circumference of the disc. . in this case,
According to the start address of the scene change recorded in the TOC area and the start address of the video file, the digital moving picture image of I-picture stored in the above address is read and special reproduction is possible by sequentially reproducing this. .

The read operation of the optical disk in this case is as shown in FIG.
It is represented by the flowchart of FIG. This flowchart shows a case where special playback is performed based on the address of the scene start portion of the moving image information recorded in the TOC area at the innermost circumference of the disc. First, the TOC area is jumped to and the scene start address is jumped. After storing in the internal memory, while jumping to the address stored above,
The I-picture in the jumped GOP is reproduced, the screen is displayed, and the operation of moving to the next jump destination address is repeated.

However, in such a method, a large amount of search destination addresses must be stored in the TOC, and the TOC information must be rewritten each time it is recorded.

Further, during the special reproduction, if the P-picture is also reproduced, it is necessary to skip the B-picture data, but in reality, the I-picture is actually skipped.
Since B, B-pictures and P-pictures are sequentially recorded on the disc, it may be impossible to reproduce the P-pictures without waiting for rotation when a track jump is performed.

The amount of I-picture data encoded by the above-mentioned intra-frame DCT is the same as that of other P-pictures.
Since it is larger than Ure and B-picture, there is a problem that it cannot be realized in order to perform ultra-high speed reproduction of several tens of times due to insufficient data input time.

When a desired GOP is searched from an arbitrary position on the disk, several times are required to search the head position of each GOP (generally, the time code and address of video image are recorded). There was a problem that the search operation of was required.

Further, since the scene change position in the moving picture image information is not known, there is a problem that it is impossible to search for each scene. The present invention aims to solve such problems.

[0024]

An optical disc according to the present invention is I- which is video information which has been subjected to intra-frame DCT.
picture, DCT code with forward motion compensation
P-picture, which is video information by encoding, and
The I-picture, P-, which are located in front of and behind in time
Motion compensated with picture as reference screen
The B-picture which is the video information by CT encoding
Digital video information composed of video information blocks containing
An optical disc on which information is recorded, said optical disc
Is composed of sectors, and the video information block is I-
picture, P-picture, B-picture
The attribute data of the video information block is placed on the head side of re.
Has an area in which the attribute data is recorded.
Area has an address corresponding to the sector at the beginning.
And at least I-p in the video information block
The video information block during playback
Arrangement information indicating the arrangement of video information in the lock and the next
The address corresponding to the sector
The address corresponding to the jump destination sector is
The attribute data of the video information block of the jump destination is recorded.
It is characterized in that it is an address of a reserved area .

The area where the attribute data is recorded is
A time code corresponding to the video information block is included .

The arrangement information is a video information block.
It is characterized in that it is the arrangement information of the I-picture inside .

The optical disk recording method according to the present invention is
I-pic, which is video information that has been subjected to intra-frame DCT
true, for DCT encoding with forward motion compensation
P-picture, which is video information, and temporal
The I-picture and P-pic located at the front and rear
DCT code with motion compensation using true as a reference screen
Video including B-picture which is video information by encoding
Digital image information consisting of image information blocks
A method for recording on a disc, the method comprising:
I-picture, P-picture, B-p
of the video information block on the top side of the image
It consists of arranging the area where the attribute data is recorded,
The optical disc is composed of sectors, and the attribute data is
The area in which the data is recorded has the area corresponding to the sector at the beginning.
It has a dress and less in the video information block.
Both when playing back I-picture
Arrangement information indicating the arrangement of video information in the video information block
And the address corresponding to the next jump destination sector.
The sector corresponding to the jump destination sector.
The dress is the attribute data of the video information block of the jump destination.
Data is the address of the recorded area.
It

The area where the attribute data is recorded is
Include a time code corresponding to the video information block
And are characterized.

The arrangement information is a video information block.
It is the arrangement information of the I-picture in
To do.

The optical disk recording apparatus according to the present invention comprises:
I-pic, which is video information that has been subjected to intra-frame DCT
true, for DCT encoding with forward motion compensation
P-picture, which is video information, and temporal
The I-picture and P-pic located at the front and rear
DCT code with motion compensation using true as a reference screen
Video including B-picture which is video information by encoding
Digital image information consisting of image information blocks
A device for recording on a disc, comprising the video information block
I-picture, P-picture, B-p
to icture by remote top side, of the video information block
Including means for arranging the area in which the attribute data is recorded,
The optical disc is composed of sectors, and the attribute data
The area where is recorded is the address corresponding to the sector at the beginning of the area.
And at least in the video information block
Also plays back the I-picture.
Arrangement information indicating the arrangement of video information in the image information block,
Contains the address corresponding to the next jump destination sector
The address corresponding to the jump destination sector is
Is the attribute data of the video information block of the jump destination
Is the address of the recorded area.

The area where the attribute data is recorded is
Include a time code corresponding to the video information block
And are characterized.

The arrangement information is a video information block.
It is the arrangement information of the I-picture in
To do.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. 1 is a block circuit diagram showing a recording system of an optical disk device according to a first embodiment of the present invention. In the figure, 30 is an A / D converter for converting an analog video signal into a digital signal, 31 is a motion detector for detecting a motion vector of a digital video signal, and 32 is a signal for decomposing video information into frequency components. Discrete cosine transformer, 33 is an adaptive quantizer, 34 is an inverse quantizer, 35 is an inverse discrete cosine transformer for restoring the original video information from frequency components, 36
Is a frame memory, 37 is a variable length encoder, 38 is a buffer memory, 39 is a format encoder for adding address information and attribute data, 40 is a color information comparator for comparing the color information before and after the screen, especially In the reference screen after motion compensation by motion vector detection, the color components before and after the temporally displaced screen are compared. Four
1 is a brightness information comparator that compares the brightness information before and after the screen,
Reference numeral 42 is a scene change judging device for judging the presence or absence of a scene change based on the outputs of both comparators 40, 41.
The scene change detector 100 is composed of 41 and 42. 43 is a modulation circuit for reducing the influence of intersymbol interference, 44 is a laser modulation circuit for modulating the laser based on information from the modulation circuit, 45 is a servo circuit in the optical disk device, and 46 is a system controller.

FIG. 2 is a diagram showing a recording format of the digital moving image video data in the first embodiment. In FIG. 2A, 47 is a wobble pit of a sample servo format or a mirror surface portion for track offset correction in a continuous guide groove system, 48 is a zone address indicating a current zone in a disk of a zone angular velocity constant rotation (CAV) system, and 49 is a zone address. A header indicating the beginning of the video GOP and a video GOP address indicating the address of the GOP, 50 is video attribute data for recording attribute data of the video signal, 51 is an I-picture header indicating the beginning of the I-picture, and 52 is 49. To 51, 53 is I-picture data, 54 is second I-picture data divided by servo pits or mirror surfaces, and 55 is third I-picture data divided similarly to 54. , 56 is P
-Picture header, and 57 and 58 are P1-picture data divided similarly to 54.

Further, FIG. 2B shows video attribute data 50.
FIG. 5 is a diagram showing a detailed format structure recorded in
9 is the scalability mode (type of hierarchical structure) of the digital video data array, 60 is the number of frames in the GOP, 61 is the GOP internal structure that defines the array of IB / P-pictures in the GOP, and 62 is the I- picture
Data array structure / position within, 63 is detailed attribute data such as whether the image in the GOP is pan, zoom, or includes a scene change, and 64 is time of one video area formed from a plurality of GOPs. Code, 65 is a jump destination address during special playback, 66 is a voice mode, 67
Is a still image mode, 68 is a reserve area, and 47 is a walve pit / mirror surface portion, which corresponds to the wolve pit pre-formatted on the optical disk shown in FIG. is there.

FIG. 3 is a diagram showing changes in the disc rotation speed when the video data recorded in the format of FIG. 2 is reproduced at a high speed by increasing the disc rotation speed.

FIG. 4 is a flow chart in the case of performing special reproduction based on the jump destination address at the time of special reproduction which is written in the video attribute data area of the head portion of the video GOP.

FIG. 5 is a flow chart in the case of performing special reproduction based on the data recorded in the video attribute data of the head portion of the video GOP indicating the presence or absence of a scene change.

FIG. 6 shows I-picture and P in GOP.
Fig. 10 is a flowchart in the case of performing special reproduction in which only picture is continuously reproduced.

Next, the operation of the first embodiment will be described with reference to the drawings. For example, a video signal represented by MPEG is subjected to digital video encoding processing as shown in FIG. 1 and recorded on a disc. At this time, first, the analog video signal is converted into digital data by the A / D converter 30, the motion vector is detected by the motion vector detector 31, and the analog video signal is compressed in the three-dimensional direction compared with the reference image. The discrete cosine transformer 32 discretizes in the frequency direction (two-dimensional direction), and the adaptive quantizer 33 performs quantization and variable length coding.

The compressed digital moving image information thus obtained is added with an address, a header, attribute data and the like by a buffer memory 38 and a format encoder 39, and is formatted as a signal to be recorded on an optical disc. At this time, the frame memory 36, which is connected to the output of the inverse discrete cosine converter 35, judges the scene change by comparing the front and back of the frame memory 36 and detecting the abrupt image change by the motion vector detector 31. Is possible.

In this case, in particular, based on the results of the color information comparator 40 and the brightness information comparator 41, the color information and the brightness information are separately compared in the time axis direction, and the change amount and the change in each screen unit. By comparing the speeds and the like, the scene change determiner 42 can accurately determine the scene change.

The output from the scene change determiner 42 is stored in the video attribute data 50 of FIG. 2 as the presence / absence of a scene change. In addition, in the format of FIG. 2A, the video attribute data 50 includes the presence / absence of a scene change, the jump destination address at the time of special reproduction, the structure in the GOP, the number of pictures in the GOP, the scalability mode, the time code, etc. Can be written, so that special reproduction or the like based on these attribute data is possible.

FIG. 2 is a diagram showing a digital moving picture image data recording format for that purpose, which is I-picture.
And the P-picture are adjacent to each other, and the video attribute data 50 is arranged at the head portion of the GOP. At the time of recording, the presence / absence of a scene change is stored in the video attribute data 50 in FIG. 2 based on the determination result of the scene change determiner 42 in the digital moving image video recording circuit shown in FIG. Remember the address. At this time, since the buffer memory 38 exists in the digital moving image video recording circuit, the recorded data is still held in the buffer memory 38 during the next video processing, so that the jump destination address can be stored.

For example, if the next GOP is an image that does not require jump reproduction (for example, if it is a sequence of rapidly moving images, a still image similar to the previous GOP), the next GOP is It is stored in the attribute data that there is no need to perform interlaced reproduction, and when the next GOP needs to be reproduced, a flag indicating that it is necessary is set to sequentially reproduce only this video attribute data 50, and it is necessary to reproduce. Only when a certain flag is set, special playback can be performed by repeating the operation of playing back the next GOP for which the flag is set.

In this case, the jump destination address may be directly specified instead of the flag. It is needless to say that in the case of reverse reproduction, even if the capacity of the buffer memory 38 is not large, it is possible to easily realize the storage of the jump destination address and the setting of the flag indicating the necessity of the reproduction of the previous GOP.

The read operation of the optical disk in this case is shown in FIG.
The video attribute data 50 is read after detecting the address of the GOP destination, and if there is a thin change, the I-picture of the GOP is played back. It is possible to continue special playback by jumping to the GOP.

Further, as shown in the flow chart of FIG.
The special reproduction can be performed by reading the jump destination address stored in the video attribute data 50. In this case, the jump destination address is stored by reading the video attribute data 50, the I-picture is played back based on this, and the track jump is continued to perform special playback.

By using such a method, a necessary GO is selected from a plurality of GOPs formed on the disc.
Special reproduction such that only P is sequentially reproduced becomes possible. In these cases, still images are continuously displayed or still images at the beginning of the scene are continuously reproduced.

In addition, I-picture and P-picture
At the time of special reproduction such that ure is continuously reproduced, it is expressed as in the flowchart of FIG. In this case, I-picture and P-pic are detected after detecting the video header.
The track is read, the track jump is performed after the B-picture header is detected, and the same operation is repeated from the video header in the next GOP. But in reality
Since the amount of I-picture and P-picture data in the GOP is large, it is considered that the special reproduction ratio does not become so large by this method.

Embodiment 2. Next, the second embodiment will be described with reference to the drawings. Figure 7 (b)
FIG. 7 is a diagram showing a data reading method in the case where the video data recorded in the format of FIG. 2 (a) is reproduced at high speed by performing a track jump, and FIG. 7 (b) is a portion of the video header 52 on the disc. Figure showing the arrangement of
FIG. 7C is a diagram showing a state of track jump in the video header portion.

FIG. 8 shows I-picture and P-picture.
I-picture playback at the time of a track jump can be performed by switching the arrangement with the front and rear for each GOP.
In the figure, 69 is an audio header indicating the beginning of an audio signal, 70 is audio data, 71 is video data recognition parity for recognizing the beginning of video data,
72 is P2- which indicates the head of the second P-picture.
picture header, 73 is P2-picture data, and 74 is B-pi indicating the beginning of B-picture.
picture header, 75-79 is B1-picture
Data, 80 is an end mark indicating the end of GOP.

FIG. 9 shows I-picture and P-pict.
GOP of video information arrangement between the Bure and B-picture
By changing the unit, the I-picture reproduction at the time of track jump is made to minimize the waiting for rotation. In the figure, 81 to 88 are B-pi.
This is the cture data.

Next, the operation of the second embodiment will be described with reference to the drawings. In FIG. 7A, the data array in the GOP is I
-Picture, P-picture, B-picture
They are arranged in the order of ure. In this case, in order to perform special reproduction, for example, the video GOP address 4 in FIG.
9, the video header 52 including the video attribute data 50 is read, the I-picture is reproduced, and then P-
Skip the picture or B-picture and move to the next G
Special reproduction is possible by repeating I-picture reproduction of OP.

However, in this case, I-per 1 GOP
Since the data occupancy rate of the picture is two-dimensional compression, it is considerably large. For example, the data amount of three to five screens of the B-picture has a P-pic.
Even if the reproduction of the true or B-picture is skipped, the special reproduction efficiency does not increase so much, and the rotation waiting time occurs, and there is a problem that the special reproduction ratio cannot be increased even that much. However, 1 GOP in FIG. 16 has 10 screens or FIG.
In the case of 15 screens of 7, the special reproduction of about double speed or triple speed becomes possible.

Therefore, in order to reduce the rotation waiting time, a data array as shown in FIG. 8 can be considered. The data array in this case is I-pict between adjacent GOPs.
That is, the order of the ure and the P-picture is exchanged. In the case of FIG. 8, the arrangement is such that the I-picture in the next GOP can be reproduced immediately after the reproduction of the I-picture in the first GOP and immediately after the track jump or after a certain servo stabilization period. Has become.

Furthermore, as shown in FIG. 9, I-pic
FIG. 8 is a diagram in which the three elements of the picture, the picture, the picture, the picture, and the picture are sequentially exchanged for each GOP.
A method that allows continuous data input of I-pictures is more conceivable than the case. 3 GOs in this case
Since the I-pictures can be continuously read between Ps, in the GOP configuration of FIGS. 15 and 16, the I-pictures of the above three GOPs can be continuously reproduced, and a smooth special reproduction can be performed. .

As described above, since the I-picture data that can be independently reproduced in the GOP can be reproduced between the GOPs without waiting for rotation, unlike the first embodiment, a special continuous smooth moving image is used. Playback is possible.

Third Embodiment FIG. 10 shows a format arrangement on a disk in the continuous guide groove method according to the third embodiment of the present invention. Further, FIG. 11 shows the format arrangement on the disk in the sample servo system according to the third embodiment. Further, FIG. 12 is a flowchart of a data read operation for increasing the rotation speed of the disc during special reproduction according to the third embodiment.

Next, the operation of the third embodiment will be described. Generally, CLV recording (constant linear velocity recording) is preferable to CAV recording (constant rotation number recording) in order to increase the recording density of the optical disc. However, in this case, the head portion of the video data, the arrangement of I-pictures, and the like are not fixed on the disk, and the arrangement of I-pictures and the like are random, so that the operations of the first and second embodiments are performed. Becomes difficult. Therefore, the disk is shown in FIG.
And zone division as shown in Fig. 11, and G in each zone.
It is conceivable to align the OP head areas in the disk radial direction.

In this case, in each zone, the linear recording density is made substantially constant between the zones by changing the number of revolutions of the disk motor, and conversely, the number of motor revolutions is constant and the data clock for recording and reproduction is changed. Therefore, the linear recording density between the zones can be made constant.

However, in this case, since the recording capacities per disk revolution are different between the zones, the zone division should be set so that the recording capacity per GOP is an integral multiple of the recording capacity per disk per revolution. Can be realized with. For example, 1 GOP = 5 tracks in the zone in the inner circumference area, while 1 GOP in the zone in the outer circumference area.
It is also possible to arrange it as OP = 2 tracks.

Further, if the zone division is set so that the data amount of the disk 1/2 round is an integer multiple, it is finer, and the data amount of the disk 1/4 round is an integer multiple. By further setting the zones as described above, it is possible to perform finer zone division.

Further, in this case, the GOP address in the video information is written immediately after the servo pit (wobble pit) in the sample servo or the mirror surface portion in the continuous guide groove system, and the mirror surface portion or wobble pit in the portion where the GOP address is recorded. By arranging so that the length and the like are different from other portions, it is possible to use the sum signal (reflection signal) from the optical head as a reference for the search at the time of search.

Further, in the system for recording / reproducing a digital moving picture image using such an optical disc, in addition to the special reproduction system using the track jump shown in the above-mentioned first and second embodiments, continuous reproduction is also possible. It is also possible to perform special playback by increasing the disc rotation speed. For example, when the disk rotation speed is increased by about 2 times, the transfer rate is doubled but data reproduction is possible. At this time, I-picture or P-picture is used.
By reproducing only re, for example, double speed reproduction becomes possible.

If the disk rotation speed is increased by 4 times or 8 times, the data speed becomes too high, and it may be impossible to detect the actual data. In this case, as shown in FIG. 3, at the time of I-picture reproduction or P-picture reproduction, the disc rotation speed is decreased to a reproducible linear velocity, and in the area where B-picture is recorded. Can also be realized by increasing the disk rotation speed.

The drive operation of the optical disc at this time is as follows.
As shown in the flow chart of FIG. 12, first, the number of rotations is increased by n times, and then the video header is detected and I-
The operation of reading the picture data and jumping to the next GOP is repeated. In this case, video attribute data 5
By storing the arrangement of I-pictures in 0, the acceleration area and deceleration area of the disk motor can be set.

[0068]

EFFECT OF THE INVENTION Optical disc and optical disc according to the present invention
According to the recording method and the recording device of (1), smooth special reproduction can be realized. In particular, by combining the jump destination information and the arrangement information, smooth special reproduction can be realized even in the optical disc on which the compressed and block-recorded digital video information is recorded.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of a recording system according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a digital moving image video data recording format according to the first embodiment.

FIG. 3 is a diagram showing a change in the number of rotations of the disc when the video data of the first embodiment is reproduced at high speed.

FIG. 4 is a flowchart in the case of performing special reproduction based on the jump destination address written in the video attribute data according to the first embodiment.

FIG. 5 is a flowchart of the data reading operation of the optical disc at the time of special reproduction in the first embodiment.

FIG. 6 is an I-picture and a P-p according to the first embodiment.
9 is a flowchart of an optical disk data reading operation during special reproduction in which pictures are continuously reproduced.

FIG. 7 is a diagram showing a digital video data recording format according to a second embodiment of the present invention.

FIG. 8 is a diagram showing a digital video data recording format according to the second embodiment.

FIG. 9 is a diagram showing a digital video data recording format according to a third embodiment of the present invention.

FIG. 10 is a diagram showing a digital video data recording format on a disc of a continuous guide groove type according to a third embodiment.

FIG. 11 is a diagram showing a digital video data recording format on a disk of the sample servo system according to the third embodiment.

FIG. 12 is a flowchart of a data read operation for increasing the rotation speed of the disc during special reproduction according to the third embodiment.

FIG. 13 is a block circuit diagram of a conventional optical disc recording / reproducing apparatus.

FIG. 14 is a diagram showing an MPEG data array.

[Fig. 15] Fig. 15 is a diagram illustrating an encoding structure when 17 screens are 1 GOP.

[Fig. 16] Fig. 16 is a diagram illustrating an encoding structure when 10 screens are 1 GOP.

FIG. 17 is a diagram showing an encoding structure when 15 screens are set to 1 GOP.

FIG. 18 is a flow chart in the case of performing special reproduction based on an address in which a scene head portion of digital moving picture image information stored in a recording format of a conventional example is stored in a TOC area on the innermost circumference of the disc.

[Explanation of symbols]

30 A / D converter, 31 motion detector, 32 discrete cosine converter, 33 adaptive quantizer, 34 inverse quantizer,
35 inverse discrete cosine transformer, 36 frame memory,
37 variable length quantizer, 38 buffer memory, 39
Format encoder, 40 color information comparator, 41
Luminance information comparator, 42 Scene change determiner, 43
Modulation circuit, 44 Laser modulation circuit, 45 Servo circuit,
46 system controller, 47 wall pit / mirror surface portion, 48 zone address, 49 video GOP address, 50 video attribute data, 51 I-pictu
re header, 52 video header, 53, 54, 55
I-picture data, 56 P-picture
Header, 57,58 P1-picture data, 5
9 scalability modes, 60 frames, 6
1 GOP internal structure, 62 Data arrangement structure / position in I-picture, 63 detailed attribute data, 64 time code, 65 jump destination address, 66 audio mode, 67 still image mode, 68 spare area, 69 audio header, 70 audio Data, 71 Video data recognition parity, 72 P2-picture header, 73 P2-picture data, 74B-pi
picture header, 75 to 79 B-picture data, 80 end mark, 81 to 88 B-picture
re data, 100 scene change detector.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H04N 5/76-5/956 G11B 20/10 G11B 20/12 G11B 27/10

Claims (9)

(57) [Claims] 1. An I-picture, which is video information on which intra-frame DCT is performed , and a P-picture, which is video information by DCT coding on which motion compensation in the forward direction is performed.
e, and the I-pictu that is located before and after in time
re, motion compensation as a reference screen the P-picture
B-pic, which is video information by the performed DCT encoding
Digi <br/> barrel video information composed of video information block containing a ture is a disc which is recorded, the optical disc is composed of a sector, the video information block I-picture, P-pi
This is on the leading side of the picture and B-picture.
The video information block has an area in which the attribute data is recorded, and the area in which the attribute data is recorded is a sector at the beginning thereof.
Has an address corresponding to
During playback to play at least I-picture in the network
And arrangement information showing the arrangement of the video information of the video information in a block of, ad corresponding to the next jump sectors
It is those containing the less, the address corresponding to the jump destination sector, the di
The attribute data of the video information block of the sampling destination was recorded.
An optical disc characterized by being an address of an area . Wherein regions where the attribute data is recorded the
The optical disc according to claim 1 , further comprising a time code corresponding to the video information block . Wherein the arrangement information, the optical disk according to claim 1 or 2, characterized in that the arrangement information of the I-pictur e of the video information block. 4. Video information for which intra-frame DCT is performed
A certain I-picture, forward motion compensation was performed
P-picture which is video information by DCT encoding
e, and the I-pictu that is located before and after in time
motion compensation using re, P-picture as reference screen
B-pic, which is video information by the performed DCT encoding
Digit composed of video information blocks including a true
A method for recording digital video information on an optical disc, comprising: I-picture and P-pi of the video information block.
This is on the leading side of the picture and B-picture.
Arrange the area where the attribute data of the video information block is recorded
The optical disc is composed of sectors, and the area in which the attribute data is recorded has a sector at the beginning.
Has an address corresponding to
During playback to play at least I-picture in the network
Shows the arrangement of video information in the video information block
Location information and the address corresponding to the next jump destination sector.
It is those containing the less, the address corresponding to the jump destination sector, the di
The attribute data of the video information block of the sampling destination was recorded.
The description of the optical disc, which is the address of the area
Recording method. 5. The area in which the attribute data is recorded is the
Including the time code corresponding to the video information block
The optical disc recording method according to claim 4, which is characterized in that. 6. The arrangement information is stored in a video information block.
It is characterized in that it is arrangement information of I-pictures.
The optical disc recording method according to claim 4. 7. Video information subjected to intra-frame DCT
A certain I-picture, forward motion compensation was performed
P-picture which is video information by DCT encoding
e, and the I-pictu that is located before and after in time
motion compensation using re, P-picture as reference screen
B-pic, which is video information by the performed DCT encoding
Digit composed of video information blocks including a true
An apparatus for recording digital video information on an optical disc, comprising I-picture and P-pi of the video information block.
This is on the leading side of the picture and B-picture.
Arrange the area where the attribute data of the video information block is recorded
The optical disc is composed of sectors, and the area in which the attribute data is recorded has a sector at the beginning thereof.
Has a corresponding address, and the image information blocks
During playback to play at least I-picture in the network
Shows the arrangement of video information in the video information block
Location information and the address corresponding to the next jump destination sector.
It is those containing the less, the address corresponding to the jump destination sector, the di
The attribute data of the video information block of the sampling destination was recorded.
The description of the optical disc, which is the address of the area
Recording device. 8. The area in which the attribute data is recorded is the
Including the time code corresponding to the video information block
The optical disk recording apparatus according to claim 7, wherein the recording apparatus is an optical disk. 9. The arrangement information is stored in a video information block.
It is characterized in that it is arrangement information of I-pictures.
An optical disk recording apparatus according to claim 7.