JP3510784B2 - Video recording and playback methods - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewritable disc medium in which coded video data and coded audio data are multiplexed and multiplexed data is recorded, or the multiplexed data. The present invention relates to a moving image recording method using a semiconductor memory in which is stored, and more particularly to a moving image recording method, a reproducing method and an apparatus capable of high speed reproduction and high speed reverse reproduction.

[0002]

2. Description of the Related Art Since video data has a very high data rate, it is difficult to record it on a disk medium such as a magnetic disk, an optical disk, a magneto-optical disk or a semiconductor memory without processing the data.

Therefore, a method has been used in which video data and audio data are encoded with high efficiency to reduce the data rate to a rate at which the data can be recorded on a disk medium without being visually or auditorily deteriorated.

As an example of a high efficiency coding system, MPEG is used.
(Moving Picture Experts G
There is a group: mpeg) method.

FIG. 14 shows an example of compressing a moving image by the MPEG method.

In the figure, a plurality of parallelograms represent frames that make up a moving image.

The process of compressing the moving image of FIG. 14 (a) by MPEG is shown in FIGS. 14 (b) and 14 (c).

In MPEG, several frames such as 12 video frames and 15 video frames are collectively referred to as GOP (Group Of Pictures).

In FIG. 14B, the video frames in the GOP 140 are classified into I frame, P frame and B frame.

[0010] The I frame indicates that it has been intra-frame coded, and the P frame indicates that it has been predictively coded in the forward direction from the I frame or the predictive coding in the forward direction from the P frame.

The B frame is located between the I frame and the P frame, or between the P frames, and is predictively coded from both directions of the I frame and the P frame.

As an example, the directions of prediction in the P frame 141 and the B frame 142 are indicated by arrows.

In MPEG, the frame order of FIG. 14 (b) is exchanged as shown in FIG. 14 (c) to create video coded data.

P frame and B frame are I frames,
Alternatively, since the predictive coding is performed from the video frame that is predictively coded from the I frame, it is necessary to first decode from the I frame in order to decode all the video frames in the GOP.

That is, when reproducing a recorded moving image from the middle by random access or the like, it is necessary to decode from the I frame.

However, since the code amount of video data compressed by MPEG is not proportional to time in a short time,
The video encoded data amount of each frame is not constant, and the recording position of the encoded data of each frame is not uniquely determined.

As one of the methods for high speed reproduction of video coded data compressed by MPEG, some frames are extracted from video frames displayed in normal reproduction,
There is a method of displaying only those frames.

By performing high-speed random access, which is a characteristic of the disk and the semiconductor memory, the data recorded in the discontinuous area can be reproduced as continuous data.

However, in the video coded data compressed by MPEG, the code amount for each frame is not constant and the start position of the frame is unknown, so it is difficult to read only the frame data used for high speed reproduction one after another. .

Japanese Patent Laid-Open No. 6-3255 discloses a conventional technique for realizing high-speed reproduction using highly efficient encoded data.
There is a method disclosed in Japanese Patent No. 53.

FIG. 18 shows the structure of video and audio multiplexed data using the conventional technique described in the above publication.

An entry packet 200 is added to video coded data and audio coded data when they are multiplexed.

The entry packet indicates the beginning (entry point) of the data forming the I frame and is placed before the data of the I frame.

The format of the entry packet is shown in FIG.
Shown in.

A packet start code, ID, and size are arranged at the head of the entry packet.

This is for making the entry packet correspond to the private stream 2 packet defined by the MPEG standard.

Next, **** ID, **** Pa
Ccket_Type is arranged, which indicates a classification unique to a specific person.

Next, Current _ # _ Dat
a_Streams, Current _ # _ Video
_Streams, Current _ # _ Audio_
Streams are arranged and indicate the numbers of data packets, video packets, and audio packets that have been multiplexed from immediately after this entry packet to immediately before the next entry packet.

Further next, entry_packe
t-3, entry_packet-2, entry_
packet-1, entry_packet + 1, e
entry_packet + 2, entry_packe
t + 3 are arranged, and the position of the entry packet three points before, two points before, one point before, one point ahead, two points ahead, and three points ahead, and the relative distance between these entry packets are indicated by the number of disk sectors. What is represented is managed.

FIG. 20 shows an encoding apparatus of the above conventional example.
The operation will be described with reference to FIG.

The video data encoded by the video encoder 17 is processed by the video entry point detection circuit 21.
2 detects the entry point.

The control device 219 receives the signal from the video entry point detection circuit 212, controls the entry packet generation circuit 218, the switching circuit 215, and the header addition circuit 216 to insert the entry packet immediately before the entry point, and the DSM 213 ( Data St
Rage Media).

At this time, entr in the entry packet
y_packet-3, entry_packet-
2, to create entry_packet-1,
The past entry packet position is stored in the entry point storage device 211.

However, entry_packet + 1, entry indicating the position of the future entry point
_Packet + 2, entry_packet + 3
Cannot be known, so these pieces of information are added after the multiplexed data is recorded.

Next, the decoding device of the above-mentioned conventional example is shown in FIG. 21, and the operation during the high speed search will be described with reference to FIG.

The entry packet information read from the DSM 213 during normal reproduction is stored in the entry point storage device 211 as needed.

When a high speed search is commanded, the controller 22
2 receives the current read position information from the DSM 213 and extracts the entry packet near that position from the entry point storage device 211.

The control unit 222 sends a command to the DSM 213 to set the read position to the entry point storage unit 211.
The data is read by moving the entry packet extracted from the high speed.

The header separation circuit 220 and the switching circuit 221 separate the read data, send the entry packet position to the entry point storage device 211 through the control device 222, and send the video encoded data to the video decoder 22. .

The video decoder 22 receives the encoded video data and reproduces the I frame.

After reproducing the I frame, the control device 222
The operation of reading the data of the next entry packet with reference to the entry packet position stored in the entry point storage device 211 is repeated.

At this time, by selecting the position of the next entry packet from the six entry point information before and after, the direction of the search can be changed and the search speed can be made variable.

[0043]

As described above, since the entry packet in the prior art manages the positions of the entry packets before and after it, when the moving image is recorded on the recording medium in real time, the next (future ) Since the position of the entry packet cannot be specified, multiplexed data including the entry packet cannot be created.

Further, the data coding apparatus stores the entry packet position in the memory in the coding apparatus, records the multiplexed data, and then additionally writes the entry packet position in the recording medium.

However, since the entry packet is placed before the video coded data that composes all I frames, a large number of entry packets exist in the multiplexed data, and after the multiplexed data is recorded. It takes time to add the information in the entry packet.

Further, in the prior art, after reading the data following the entry packet from the recording medium, by analyzing the header information of the data, the end of the data forming the I frame is judged, and the read position is set to the next position. Move to the entry packet of.

Therefore, even if the data forming the I frame is actually read from the recording medium, it takes time for error correction processing and determination of the end of the I frame data, and as a result, I frame 1 The processing time of a sheet becomes long and the speed of high speed search becomes slow.

Further, when an uncorrectable error occurs in a part of the data read from the recording medium, the end of the data forming the I frame cannot be detected and the read position is moved to the next entry packet. Since it disappears, control of the disk becomes unstable. There was such a problem.

An object of the present invention is to solve the problems of the conventional moving image recording method and reproducing method, and to provide a moving image recording method and reproducing method that solve the problems.

[0050]

In order to solve such a problem, the present invention multiplexes a plurality of data including at least video encoded data obtained by encoding video data and audio encoded data obtained by encoding audio data. And this
When the multiplexed data of is composed of a plurality of packets, the start position of the packet, the start position of the one unit when a plurality of video frames are used as one unit, and at least 1 for each unit. The end position or forward frame of one or more video frames encoded with intraframe coding.
The end position of encoded video frames in frame predictive coding, Oh in dynamic image recording method that having a step of recording on a recording medium as a separate management file and the multiplexed data
I, the multiplexed data comprised of previous SL plurality of packets, when recorded on at least the disc-shaped recording medium, said packet is divided video encoded data,
And / or, divided audio encoded data by multiplexing the header and configuration der invalid data added with the
Ri, first the starting position of the packet, the first sector address first data is recorded in the packet, or, from the sector where the first data is recorded in the multi <br/> duplexed data
A step of the relative sector number to the sector, the start position of one unit, the second the first data of the one unit is recorded
Address of the sector, or the number of relative sectors from the sector in which the top data of the multiplexed data is recorded to the second sector, or the relative sector from the start position of the packet to the address of the second sector a step to several, also address the third sector end position of the video frame coded in frame coding, the last data of the video frame coded in the intraframe coding is recorded , Or the relative number of sectors from the sector in which the top data of the multiplexed data is recorded to the third sector, or the number of relative sectors from the start position of the packet to the third sector, or the fourth sector addresses immediately preceding the data of the next video frame of the video frame coded in the frame coding is recorded or a previous the multiplexed data The relative sector number from the sector data is recorded to the sector of the fourth, or the steps of the relative number of sectors from the start position of the packet to said fourth,
Further, the end position of the video frame where the is precoded by interframe predictive coding direction frames, the previous inter-direction frame prediction
Fifth sector address the last data of the video frame coded in the coding is recorded, or, relative sector number from the sector in which the first data is recorded in the multiplexed data to a sector of the fifth, Alternatively, the relative number of sectors from the start position of the packet to the fifth sector, or
Sixth sector address of the immediately preceding data is recorded in the next video frame of the video frame coded in predictive coding between said forward frame or the sector in which the first data is recorded in the multiplexed data the relative number of sectors to the sector of the sixth, or a dynamic image recording how to further comprising a step of the relative number of sectors from the start position of the packet to the sixth, the invention also A step of reading the multiplexed data and the management file recorded by the above-mentioned moving image recording method from the recording medium, and a plurality of video frames are recorded based on the information in the management file. when formed into a unit, from the start position of the one unit, prior to
The part of the multiplexed data recorded up to the end position of the video frame encoded by the intra-frame encoding or the end position of the video frame encoded by the forward inter-frame predictive encoding is recorded. A moving image reproducing method characterized by comprising a step of performing high-speed reproduction by repeating reading from the recording medium, and the present invention is a recording medium in which multiplexed data and a management file are at least a disc-shaped recording medium. , when being recorded in the moving image recording method, when a plurality of video frames as one unit, the starting position of the one unit, the second sector in which the head of the data of the one unit is recorded Address, or the relative number of sectors from the sector in which the top data of the multiplexed data is recorded to the second sector, or the second sector from the start position of the packet A step of relative sector number to the address, also the end position of the encoded video frames in the intraframe coding, the last data of the video frame coded in the intraframe coding is recorded Address of the third sector, or the number of relative sectors from the sector in which the top data of the multiplexed data is recorded to the third sector, or the relative number of sectors from the start position of the packet to the third sector Number of sectors or the frame
The address of the fourth sector in which the data immediately before the video frame following the video frame encoded by the inner coding is recorded, or the sector from the sector in which the head data of the multiplexed data is recorded to the fourth sector To the number of relative sectors from the start position of the packet to the number of relative sectors to the fourth, and the forward interframe prediction code.
The encoded end position of the video frame of, the front
The address of the fifth sector in which the last data of the video frame encoded by the inter-frame predictive encoding is recorded,
Or, relative sector number from the sector in which the first data is recorded in the multiplexed data to a sector of the fifth, or the relative sector number from the beginning of the packet to the sectors of the fifth, or the forward The address of the sixth sector in which the data immediately before the video frame following the video frame encoded by the inter-frame predictive coding is recorded, or the sector in which the head data of the multiplexed data is recorded relative sector number to the sector, or Ru dynamic image reproducing method der you further comprising a step of from the start position of the packet and the relative sector number to the sixth.

[0051]

1 is a block diagram showing an embodiment of a moving image recording method according to the present invention.

FIG. 11 shows an example of a block diagram which constitutes the moving image recording apparatus. The disk 10, the pickup 11, the ECC 12, the drive control section 13, the management file storage section 14, the video / audio multiplexing section 15 are shown. , Audio encoder 16, video encoder 17, detector a18, and controller 19.

The video coded data coded by the video encoder 17 and the audio coded data coded by the audio encoder 16 are multiplexed by the video / audio multiplexing unit 15.

The multiplexed data passes through the detector a18, is subjected to error correction processing by the ECC 12, and is recorded on the disk 10.

The controller 19 instructs the drive control section on the data write position.

Video / audio multiplexer 15 and detector a
18 sends information necessary for creating the management file to the controller 19, and the controller 19 forms the management file in the management file storage unit 14.

The format of the management file is shown in FIG.

The management file is composed of the entire disk information 40 and a plurality of packet information 41 following it.

The packet information 41 is composed of the size of this packet information, the packet start position, the GOP start position, the I frame end position, and the P frame end position.

The packet start position is the address of the sector in which the head data of the packet is recorded or the relative number of sectors as seen from the sector in which the head data of the multiplexed data is recorded.

The GOP start position is the address of the sector in which the head address of GOP data is recorded.

The end position of the I frame is the address of the sector in which the last data of the I frame is recorded or the address of the semter in which the data immediately before the next frame of the I frame is recorded.

The end position of the P frame is the address of the sector in which the last data of the P frame is recorded.

The GOP start position, the I frame end position, and the P frame end position are set as the relative sector numbers as seen from the sector in which the head of the multiplexed data is recorded or the sector in which the head data of the packet is recorded. I don't mind.

These positions are, for example, as shown in FIG. 7, an ID area and a sector address indicating the type of position, or
It is managed in an area showing the number of relative sectors.

As shown in FIG. 4, the data multiplexed by the video / audio multiplexer 15 of FIG. 1 is composed of a plurality of packets.

Packet management information is placed at the head of the packet, and then several GOPs of data are placed next.

Multiplexing of video and audio is performed by, for example,
The audio coded data 42 is arranged first for each GOP, and then the video coded data is arranged.

The packet management information is composed of information for separating audio data and video data in the packet, and information for synchronizing reproduction of video and audio.

This is, for example, as shown in FIG. 10, a system time reference reference value SCR (System Cloc).
k Reference), the time when the first video frame after this is displayed VPTS (Video Pres)
entation TimeStamp), the time at which the first audio frame after this is displayed APTS (A
audio Presentation Time St
amp), the size of audio encoded data following the packet management information, and the size of video encoded data A
It is composed of V separation information.

The relationship between packets and disk clusters is shown in FIG.

A packet is composed of an integer cluster.

However, since the code amount of video is not constant, an empty area is created at the end of the packet to adjust the length of the entire packet.

In the whole disc information, free sector information of the disc, remaining recording time information and a plurality of moving picture information as shown in FIG. 6 are arranged.

The moving image information includes a title, a creation date and time, a recording time, and a unit of one moving image recorded by the user.
Packet connection information is placed.

The packet connection information indicates the reproduction order of packets composed of a plurality of GOP's worth of data, and the user can edit the reproduction order of the packets or delete the packets.

Next, the operation of the embodiment of the moving image recording apparatus of the present invention will be described with reference to FIG.

The video / audio multiplexer 15 multiplexes video coded data and audio coded data with a plurality of GOPs as delimiters.

For example, audio coded data and video coded data are arranged in this order for each GOP.

Packet management information is added to the beginning of the delimited data, and an empty area is added to the end of the data to create a packet with an integer cluster size, and the multiplexed data is transmitted to the detection unit a18.

Further, the video / audio multiplexing unit 15 is
Notify the controller 19 of packet creation.

The detecting unit a18 detects the GOP start position, the I frame end position, and the P frame end position from the multiplexed data sent from the video / audio multiplexing unit 15, and notifies the controller 19 of them.

This follows the flowchart of FIG. 8, for example.

In the figure, in step S60, the PTC
And set the initial value of PSC.

PTC and PSC are variables that become 1 when the picture type code of I or P and the picture start code of the frame next to the I frame or P frame are detected, respectively.

Here, the picture start code represents a picture (frame) start code, the picture type represents an encoding method (I, P, B), and these are MP.
It is standardized by EG.

In steps S61 and S62, when the sequence header code is detected, it is notified to the controller 19 of FIG. 1 as the start of GOP.

The sequence header code is the image size,
It is a start code of frame information having the same attribute such as an image rate, which is also standardized by MPEG.

In steps S63, S64 and S65, when the picture start code is detected and PTC = 1, the data immediately before the picture start code is notified to the controller 19 of FIG. 1 as the end of the I frame or P frame, and PSC = Set to 1.

In steps S66, S67 and S68, a picture type code is detected, and when the picture type code is I or P, PTC = 1 is set and the detected picture type is stored in PIC_TYPE.

The above processing is repeated until the end of the video sequence is detected in step S69.

By the above processing, the start position of the GOP, I
The end position of the frame and the end position of the P frame are detected.

The controller 19 records the signals sent from the video / audio multiplexer 15 and the detector a18, and the detected GOP start position, I frame end position, and P frame end position on the disk from the management file. A management file is created in the storage unit 14.

The created management file is recorded on the disc 10 after the moving image recording is completed or when the disc is taken out.

When handling a disc on which a moving image has already been recorded, the management file is read from the disc 10 immediately before the start of recording the moving image or when the disc is inserted into the moving image recording apparatus, and the management file storage unit 14 Transferred to.

In the above-described embodiments, the end positions of all I frames and the end positions of all P frames are arranged in the packet information of the management file.

However, the present invention is not limited to this, and the data amount of the management file may be saved by reducing the frame end position to be managed.

This may be a format in which the end position of the P frame as shown in FIG. 5 is not managed.

In the flowchart of FIG. 8, the end of the I frame or P frame is the data immediately before the I frame or P frame, but the end of the I frame or P frame is the end of the data of the I frame or P frame. I don't mind.

The method of multiplexing the audio coded data and the video coded data forming the packet is not limited to the method of arranging the audio coded data and the video coded data in order for each GOP shown in FIG. No, FIG. 11
A method of arranging video coded data and audio coded data in order for each GOP shown in (a) or a method of arranging audio coded data for each video frame in FIG.

The multiplexed data is not limited to video and audio. For example, a sub-picture area 100 including subtitle information shown in FIG. 12 or an after-recording area 110 shown in FIG. 13 may be added. Absent.

In this embodiment, a sequence header is placed at the beginning of GOP.

This is because if the sequence header is arranged only at the beginning of the encoded video data, the sequence header cannot be read when the multiplexed data is reproduced from the middle by editing or the like, and normal reproduction cannot be performed.

Therefore, in the present embodiment, the sequence header is arranged at the head of each GOP data of the multiplexed data,
It is possible to play from a GOP on the way.

Next, the processing during high speed reproduction of the moving picture reproducing method of the present invention will be described.

FIG. 15 shows a disk read operation in the high speed reproduction according to the present invention.

In the high-speed reproduction, a part of the video sequence forming the GOP 150 is read from the disk, the I frame 152, the P frame 153, and the P frame 154 are reproduced in order, and a pickup (not shown) of the reproducing device is sought to move several frames ahead. This is performed by reading a part of the coded data of the GOP 151 and reproducing the I frame, the P frame, and the P frame in order.

At this time, the coded data to be read is
IBBPBBP is set, and reading is started from the beginning of the I frame, and reading is ended at the end of the data forming the second P frame. (In FIG. 15, an example is shown in which the reading is completed at the second P frame, but the number of P frames displayed is not limited to two. It is also possible to display only I frames. The read B frame is difficult to decode as compared with the I frame and the P frame, and thus is not reproduced.

The video frame to be reproduced is an I frame,
Although there are only P frames, the code amount of B frames is smaller than that of I frames and P frames.
It is more efficient to read out the frames continuously and discard the unnecessary B-frame encoded data without reproducing them, rather than reading only the encoded data of only the frames.

An embodiment of the moving image reproducing method of the present invention is shown in FIG.

[0111] The figure shows an example of a block diagram which constitutes the moving picture reproducing apparatus. The disk 10, the pickup 11, the ECC 12, the management file storage unit 14, the video / audio separation unit 20, the audio decoder 21,
Video decoder 22, detector b23, controller 2
4 and the drive control unit 25.

The multiplexed data read from the disc 10 by the pickup 11 passes through the ECC 12 and undergoes error correction processing, and is input to the video / audio separation unit 20.

The video / audio separating section 20 separates the multiplexed data into video coded data and audio coded data based on the header information of the multiplexed data.

The separated video coded data is detected by the detection unit b.
The audio coded data that has passed through 23 and is reproduced by the video decoder 22 and separated is reproduced by the audio decoder 21.

When the high speed reproduction is instructed, the controller 24 receives the disc position information of the data currently read from the drive control unit 25.

Then, the number of video frames to be reproduced for each GOP is determined from the instructed reproduction speed.

For example, in the case of low speed search, all I frames and P frames are reproduced, and in the case of high speed search, only I frames are reproduced.

Next, the controller 24 sets the read start position and the read end position by referring to the management file stored in the management file storage unit 14 from the number of playback frames for each GOP.

Next, the controller 24 instructs the drive control section 25 to read the data at the specified disk position, and outputs the multiplexed data required for high speed reproduction to the disk 1.
Read from 0.

When the reading of the multiplexed data is completed, the pickup 11 is made to jump to the start position of the GOP to be reproduced next.

The number of GOPs to jump is also determined by the speed of high speed reproduction.

This is, for example, one GOP ahead in the case of low speed search and several tens ahead GOP in the case of high speed search.

High-speed reproduction is performed by repeating the above processing.

The operation of the controller 24 during high speed reproduction will be described.

The controller 24 performs processing according to the flowchart of FIG.

In the same figure, in step S70, the jump size, GOP, and
Set the number of display frames for each and the initial values in the forward and reverse directions.

In addition, the address of the GOP start position of the packet information of the management file corresponding to the GOP currently being reproduced or in the reproduction stopped state is set to adr and is being reproduced or in the reproduction stopped state. The packet start position address of the packet information of the management file corresponding to the packet of interest is set to packet_adr, and the size of the packet information file is set to length.

The unit of size and address is ID in FIG.
And the number of bits indicating the position are added together.

The number of bits of the packet information size in the packet information is also equal to the above unit.

Explaining with the example of FIG. 4, the value of adr is GO.
When the P start position 43 is shown, adr + 1 is the I frame end position 44, and adr + 2 is the P frame end position 4
5 is shown.

In steps S72, S73 and S74, it is confirmed whether the set "display frame number P for each GOP" can be actually displayed.

In step S75, the multiplexed data required for high speed reproduction is read from the disk and reproduced in accordance with the number of displayable frames.

Data is read from the disk by transferring the GOP head position stored at the address adr of the management file and the frame end position stored at the address adr + i to the drive control unit 25.

If reproduction in the reverse direction is designated in step S75, the I frame and the plurality of P frames read from the disk and decoded are reproduced in the reverse order.

By displaying the images of the frames to be reproduced successively for several frames, it is possible to prevent the display of the images from being interrupted and the display being interrupted before the step S75 is executed again.

Steps S79, S80, S82, S83
Then, it is confirmed whether the display position is out of the range of the moving image due to fast-forwarding and rewinding, and if it exceeds the range, the high-speed reproduction operation is ended.

In steps S79 and S80, it is determined whether or not it is out of the forward range, and then in steps S82 and S83.
To determine if it is outside the range in the opposite direction.

In step S88, it is determined whether or not there is a jump destination GOP, and if it exists, adr is updated to the jump destination GOP in step S89, and the process returns to step S72.

As shown in FIG. 2, the multiplexed data read from the disc is separated into video coded data and audio coded data by the video / audio separation section 20.

At this time, the data read from the disc includes encoded data of an I frame for reproduction and a B frame for no reproduction between P frames.

The detecting section b23 detects the I-frame by detecting the picture start code and the picture type.
Only the encoded data of P frames is sent to the video decoder 22.

As described above, high speed reproduction using the management file is realized.

Next, another embodiment of the present invention will be described.

The recording medium used in the present invention is not limited to a disk, and may be recorded in a semiconductor memory, for example.

FIG. 16 shows an example of a block diagram of a moving image recording apparatus using a semiconductor memory, and FIG. 17 shows an example of a block diagram of a moving image reproducing apparatus using a semiconductor memory.

In FIG. 16, a read / write address of the semiconductor memory 160 is instructed by the controller 19, and a read address of the semiconductor memory 160 is instructed by the controller 24 in FIG.

Other configurations and operations are in accordance with the previous embodiment.

[0148]

As described above, according to the present invention, when the compressed video data and audio data are multiplexed and recorded on the recording medium, a packet start position, a GOP start position, an I frame end position, and a P frame end. By recording the positions collectively as a management file separately from the multiplexed data, the recording time of the position information is greatly reduced.

Further, since the management file data and the multiplexed data can be managed separately, the data management is simplified, and various future changes such as changing the recording format of the management file data are possible. Will be able to respond flexibly.

Further, according to the present invention, by reading the multiplexed data from the disk by referring to the management file, the time required to reproduce one frame in high speed reproduction is shortened, so that the reproduction speed is improved or With the same playback speed as before, smooth playback can be performed by displaying more frames.

Further, the control of the disc for reading the data from the recording medium does not depend on the read multiplexed data, so that the control becomes simple and the control of the disc becomes unstable even if a read error occurs. The resistance to data errors is increased.

[Brief description of drawings]

FIG. 1 is a diagram showing an example of a block diagram of an embodiment of a moving image recording method of the present invention.

FIG. 2 is a diagram showing an example of a block diagram of an embodiment of a moving image reproducing method of the present invention.

FIG. 3 is a diagram illustrating a relationship between a packet and a cluster according to the present embodiment.

FIG. 4 is a diagram showing a configuration of a management file.

FIG. 5 is a diagram showing a configuration of a management file.

FIG. 6 is a diagram showing a structure of entire disc information.

FIG. 7 is a diagram showing a format of packet information.

FIG. 8 is a flowchart showing the operation of the detection unit a.

FIG. 9 is a flowchart showing the operation of the controller in high speed reproduction.

FIG. 10 is a diagram showing a structure of packet management information.

FIG. 11 is a diagram showing an example of multiplexing video and audio.

FIG. 12 is a diagram showing an example in which a sub-picture area is added.

FIG. 13 is a diagram showing an example in which an after-recording area is added.

FIG. 14 is a diagram showing a process of compression by MPEG.

FIG. 15 is a diagram showing an operation during high-speed reproduction according to the present invention.

FIG. 16 is a diagram showing an example of a block diagram of another moving image recording apparatus of the present invention.

FIG. 17 is a diagram showing an example of a block diagram of another moving image reproducing apparatus of the present invention.

FIG. 18 is a diagram illustrating an entry point of a conventional form.

FIG. 19 is a diagram showing a conventional entry packet.

FIG. 20 is a diagram showing a conventional data encoding device.

FIG. 21 is a diagram showing a conventional data decoding device.

[Explanation of symbols]

10 discs 11 pickups 12 ECC 13, 25 Drive controller 14 Management file storage 15 Video / Audio multiplexer 16 audio encoder 17 Video encoder 18 detector a 19, 24 controller 20 Video audio separation unit 21 Audio Decoder 22 Video Decoder 23 Detector b 40 Disc information 41 Packet information 42 audio coded data 43 GOP start position 44 I end position 45P end position 100 sub-picture area 110 Post-recording area 140, 150, 151 GOP 141, 153, 154 P frames 142 B frame 152 I frame 160 semiconductor memory 200 entry packets 211 entry point storage device 212 Video entry point detection circuit 213 DSM 214 code buffer 215,221 Switching circuit 216 Header addition circuit 217 Multiplexing system clock generator 218 entry packet generation circuit 219, 222 Control device 220 header separation circuit

─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-8-45249 (JP, A) JP-A-7-170488 (JP, A) JP-A-7-170492 (JP, A) JP-A-9- 46712 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) H04N 5/76-5/956 G11B 20/12

Claims (3)

(57) [Claims] 1. A least encoded video data and the encoded video data and audio data multiplexing a plurality of data including audio encoded data obtained by encoding, this
When the multiplexed data of is composed of a plurality of packets, the start position of the packet, the start position of the one unit when a plurality of video frames are used as one unit, and at least 1 for each unit. The end position of a video frame coded by one or more intra-frame coding , or the end position of a video frame coded by at least one or more forward inter-frame predictive coding is described above. data and is a dynamic image recording method that having a step of recording on a recording medium as a management file in another area, the multiplexed data comprised of the plurality of packets, small
At the time of recording on a disc-shaped recording medium, the packet is divided into video encoded data and
And / or multiplexed audio coded data
Header and invalid data are added, and the start position of the packet is recorded by the top data of the packet.
Address of the first sector to be recorded or the multiplexing
From the sector in which the top data of the data is recorded,
The step of setting the relative sector number up to the unit and the start position of the unit is recorded by the head data of the unit.
Address of the second sector to be recorded or the multiplexed data
Data from the sector in which the first data is recorded to the second sector
Up to the relative sector number, or the start position of the packet
From the address of the second sector to the relative sector number
And the video frame encoded by the intraframe encoding.
The end position of the frame was encoded by the intra-frame encoding.
The third segment where the last data of the video frame is recorded
Data address or the top data of the multiplexed data
Relative sector from the recorded sector to the third sector
Number or the third sector from the start position of the packet
Up to the relative number of sectors, or the intra-frame coding
Directly after the video frame following the encoded video frame
Fourth sector address before data is recorded also
Is the sector in which the top data of the multiplexed data is recorded
To the fourth sector, or the relative number of sectors
The relative sector number from the start position of the
And also encoded with the forward interframe predictive coding
Predict the end position of a video frame between the forward frames
The last data of the encoded video frame is
Address of the fifth sector to be recorded, or the multiplexing
From the sector in which the first data of the data is recorded, to the fifth sector
Number of relative sectors to the packet, or the start position of the packet
Relative sector number from the position to the fifth sector, or
A video frame coded by the forward interframe predictive coding.
The data just before the next video frame of the frame is recorded.
Address of the sixth sector, or the multiplexed data
From the sector where the top data is recorded to the sixth sector
Relative sector number or from the start position of the packet
Characterized by having a step of setting the relative sector number up to the sixth
And the moving image recording method. 2. A moving image recording method according to claim 1.
The multiplexed data and management file
Based on the process of reading from the recording medium and the information in the management file, multiple video frames are recorded.
From the start position of the unit when the unit is 1 unit,
Of the video frame encoded by the intra-frame encoding
End position, or in the forward interframe predictive coding
Recorded up to the end of the encoded video frame
In addition, a part of the multiplexed data may be read from the recording medium.
It has a step to perform high speed reproduction by repeating and
A moving image reproducing method characterized by the above. 3. A video encoding at least video data.
Audio coded audio and audio data
Multiple data, including Dio-encoded data, can be
When the multiplexed data of is composed of multiple packets
To, upon a start position of the packet, a plurality of video frames as one unit, the one unit
Starting position and at least one or more intra-frame encoding for each unit
The end position of the video frame encoded by
Code with at least one forward interframe predictive coding
The end position of the multiplexed video frame is set to the multiplexed data.
Data is recorded on the recording medium as a management file in an area other than
When recorded by a moving image recording method having a step, the start position of the one unit is recorded by the top data of the one unit.
Address of the second sector to be recorded or the multiplexed data
Data from the sector in which the first data is recorded to the second sector
Up to the relative sector number, or the start position of the packet
From the address of the second sector to the relative sector number
And the video frame encoded by the intraframe encoding.
The end position of the frame was encoded by the intra-frame encoding.
The third segment where the last data of the video frame is recorded
Data address or the top data of the multiplexed data
Relative sector from the recorded sector to the third sector
Number or the third sector from the start position of the packet
Up to the relative number of sectors, or the intra-frame coding
Immediately before the next video frame after the encoded video frame
Address of the 4th sector where the data of
Is the sector in which the top data of the multiplexed data is recorded
To the fourth sector, or the relative number of sectors
The relative sector number from the start position of the
And also encoded with the forward interframe predictive coding
Predict the end position of a video frame between the forward frames
The last data of the encoded video frame is
Address of the fifth sector to be recorded, or the multiplexing
From the sector in which the first data of the data is recorded, to the fifth sector
Number of relative sectors to the packet, or the start position of the packet
Relative to the fifth sector, or
Video frames encoded with forward interframe predictive coding
The data immediately before the next video frame of the system is recorded
Address of sixth sector or destination of the multiplexed data
From the sector where the head data is recorded to the sixth sector
The relative sector number or the start position of the packet
Characterized by having a step of setting the number of relative sectors up to 6.
The moving image reproducing method according to claim 2.