JPH1028273A - Medium for recording video data and method therefor and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To validly use a recording medium capacity, without repeatedly adding or recording the command of a display control sequence table for each sub-video unit. SOLUTION: Prescribed objective data are compressed by a prescribed data compression system and blocked into plural compressed data blocks (PXD). At the time of adding and recording a display control data block (SP DCCMD SAMPLE) in each compressed data block for controlling pixel data when each compressed data block is decoded by display control data, when display control contents for the following next compressed data block are the same as the display control contents for the preceding compressed data block, the addition of the display control data block to the next compressed data block is omitted, and the display control data block is added and recorded to the preceding compressed data block.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium such as an optical disk for recording data of different types and types, such as compressed moving image data and audio data, a method and an apparatus for recording data on the recording medium, and the data thereof. Of the playback device.

[0002]

2. Description of the Related Art Conventionally, video tape recorders, LDs, etc.
In a (laser disc) reproducing apparatus, when a movie is reproduced, subtitles are also reproduced, but subtitles displayed on the screen are recorded together with video.

On the other hand, recently, moving picture data, audio data, and sub-picture data (for example, subtitle data) are compressed and recorded on a small-sized compact disc. A system has been developed in which a plurality of different types are recorded, and at the time of reproduction, audio and subtitles in a desired language can be arbitrarily selected and reproduced.

[0004] The sub-picture data is data compressed by a run-length method and is unitized. This unit is further divided into a plurality of packets to form a packet.
Recorded on the disc. Here, in the sub-picture data unit, when this is decoded and reproduced as a picture signal to be projected on the screen, a command for a color code that determines the color of the image, and a contrast with the main picture are determined. , A command for setting a color change and a contrast change, a command for determining a display area, and the like.

[0005]

As a result, the data amount of the sub-picture data unit may increase, which may limit the recording of other data. Also, when the data amount of the sub-picture data unit increases, and when sub-picture data of many languages is recorded, the ratio of occupying the recording area of the disc increases.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method and apparatus for recording and reproducing sub-picture data and a recording medium which can reduce the data amount of a command accompanying the sub-picture data.

[0007]

A recording medium according to the present invention comprises:
A predetermined target data is compressed by a predetermined data compression method and divided into a plurality of compressed data blocks, and each of the compressed data blocks is controlled by display control data to control pixel data when each of the compressed data blocks is decoded. When the display control data block is added and recorded, the display control content for the succeeding compressed data block is the same as the display control content for the preceding compressed data block. The addition of a display control data block to the block is omitted, and a display control data block is added to the preceding compressed data block and recorded.

In the recording medium of the present invention, the display control data included in the display control data block includes a color control command for setting a color code of corresponding pixel data, a contrast control command for setting contrast, This is display control data including any one of the display area control commands for setting the display area.

In the recording medium of the present invention, the display control data included in the display control data block includes a basic color control command for setting a basic color code of corresponding pixel data, and a basic contrast for setting a basic contrast. A basic command group including a control command and a basic display area control command for setting a basic display area, and an individual command group (an individual color control command for setting an individual color code) which has priority over the control state of the basic command group , An individual contrast control command for setting an individual contrast, and an individual display area control command for setting an individual display area).

Further, according to the recording method of the present invention, predetermined target data is compressed into a plurality of compressed data blocks by a predetermined data compression method, and the pixel data when each compressed data block is decoded is displayed. When a display control data block is added to each compressed data block to be controlled by data and recorded, the display control content for the succeeding next compressed data block is the same as the display control content for the preceding compressed data block. In this case, the addition of the display control data block of the next compressed data block is omitted, and the display control data block is added and recorded only in the preceding compressed data block.

Further, according to the reproducing apparatus of the present invention, predetermined target data is compressed by a predetermined data compression method to be divided into a plurality of compressed data blocks, and the pixel data when each compressed data block is decoded is displayed and controlled. In the case where a display control data block is added to each compressed data block to be controlled by data and recorded, the display control content for the next subsequent compressed data block is the same as the display control content for the preceding compressed data block. In the case of the content, the addition of a display control data block to the next compressed data block is omitted, and a video data recording medium in which a display control data block is added to the preceding compressed data block is recorded. An apparatus for reproducing, decoding and acquiring decoded data to obtain decoded data And the display control data block is fetched to generate display control data, the decoded data is display-controlled, and when the next compressed data block in which the display control data block is omitted arrives, the current holding is performed. Sequence control means using the display control data.

According to the above-described method and apparatus, the data amount of the command accompanying the sub-picture data can be reduced, so that the recording capacity of the recording medium is made efficient, and the burden of the command transfer processing on the reproducing apparatus is also taken. Can be reduced. Further, the transmission efficiency and processing efficiency of the transmission path for transmitting the data are improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An image information encoding / decoding system according to an embodiment of the present invention will be described below with reference to the drawings. In order to avoid duplicate explanations,
Common reference numerals are used for functionally common parts in a plurality of drawings.

FIGS. 1 to 21 are diagrams for explaining an image information encoding / decoding system according to an embodiment of the present invention. FIG. 1 schematically shows a recording data structure of an optical disk OD as an example of an information holding medium to which the present invention can be applied.

The optical disk OD has, for example, about 5
It is a double-sided laminated disc with a storage capacity of G bytes,
A number of recording tracks are arranged between a lead-in area on the inner circumference side of the disc and a lead-out area on the outer circumference side of the disc. Each track is composed of a large number of logical sectors, and various information (appropriately compressed digital data) is stored in each sector.

FIG. 2 shows an example of the data structure of a video file recorded on the optical disk OD of FIG. As shown in FIG. 2, the video file includes file management information 1 and video data 2. The video data 2 includes a video data unit (block), an audio data unit (block), a sub-video data unit (block), and information NAV (DSI; DataSearch Inf) necessary for controlling the data reproduction.
or NAV units (blocks) that record ormation, PCI; including Picture Control Information). Each unit is divided into packets of a fixed data size for each data type, for example. The video data unit, the audio data unit and the sub-picture data unit are reproduced in synchronization with each other based on the NAV arranged immediately before these unit groups.

That is, in the aggregate of a plurality of logical sectors in FIG. 1, a system area for storing system data used for reproducing the disk OD, a volume management information area, and a plurality of file areas are formed. You.

Of the plurality of file areas, for example, file 1 contains main video information (video data = V in the figure).
IDEO), sub-picture information having auxiliary contents with respect to the main picture (sub-picture data in the figure = SUB) Pictur
E), audio information (audio data in the figure = AUDI)
O), playback information and the like.

FIG. 3 illustrates a logical structure of a pack of encoded (run-length compressed) sub-picture information in the data structure illustrated in FIG. As shown in the upper part of FIG. 3, one pack of the sub-picture information included in the video data is composed of, for example, 2048 bytes (2 kB). One pack of sub-picture information is added after the top pack header.
It contains one or more sub-picture packets. The pack header is provided with time (SCR; System Clock Reference) information serving as a reference through reproduction of the entire file. Sub-picture packets in a pack of sub-picture information to which the SCR of the same time information is added are described later. Is transferred to the decoder that performs the processing. The first sub-picture packet is composed of run-length-compressed sub-picture data (SP) together with a sub-picture unit header (SPUH) described later, after the packet header. DATA1). Similarly, the second sub-picture packet is composed of run-length compressed sub-picture data (SP
DATA2).

Such a plurality of sub-picture data (SP D
ATA1, SP DATA2,...) For one unit (one unit) of run-length compression is a sub-picture data unit 30. The sub-picture data unit 30 is provided with a sub-picture unit header 31. After this sub-picture unit header 31, picture data for one unit (for example, data for one horizontal line of a two-dimensional display screen)
33 including pixel data 32 obtained by performing run-length compression on the image data and display control sequence information of each sub-picture pack
Followed by

The sub-picture data unit 30 includes a sub-picture unit header (SPUH) 31 in which various parameters for sub-picture display are recorded, display data (compressed pixel data; PXD) 32 composed of run-length codes, and , And a display control sequence table (DCSQT) 33.

FIG. 4 illustrates a part of the contents of the sub-picture unit header 31 in the run-length compressed data 30 for one unit illustrated in FIG. Sub-picture unit header (SPUH) 31 has pixel data (PXD) 32
Display size on the TV screen, ie, display start position and display range (width and height) (SPDSZ; 2 bytes);
The recording start address (SP) of the display control sequence table 33 in the sub-picture data packet DCSQTA; 2 bytes).

More specifically, as shown in FIG. 4, various parameters having the following contents are recorded in the sub-picture unit header (SPUH) 31: (1) Monitoring of this display data Information indicating the display start position and display range (width and height) on the screen (SP
(2) Recording start position information (display control sequence table start address SPDCSQTA of sub-picture) of the display control sequence table 33 in the packet.

FIG. 5 shows run-length compression rules 1 to 6 when pixel data (run-length data) of the sub-picture shown in FIG. 3 or 4 is created. According to this rule, the data length (variable length) of one unit is determined. Then, encoding (run-length compression) and decoding (run-length decompression) are performed with the determined data length.

FIG. 5 shows a case where the sub-picture pixel data (run-length data) 32 illustrated in FIG. 4 is composed of 2-bit pixel data, and the run-length employed in the encoding method according to one embodiment. 9 illustrates compression rules 1 to 6.

FIG. 6 shows a case where the sub-picture pixel data (run-length data) 32 illustrated in FIG. 4 is composed of 2-bit pixel data.
FIG. 6 is a diagram for specifically explaining No. 6;

According to rule 1 shown in the first column of FIG. 5, when one to three identical pixels continue, one unit of encoded (run-length compressed) data is constituted by 4-bit data. In this case, the first two bits represent the number of continuous pixels, and the following two bits represent pixel data (such as pixel color information).

For example, the first compressed data unit CU01 of the video data PXD before compression shown in the upper part of FIG.
Two 2-bit pixel data d0, d1 = (0000) b
(B indicates binary). In this example, two identical 2-bit pixel data (00) b are continuous (continuous).

In this case, as shown in the lower part of FIG. 6, d0 and d1 = (1000) b, which connect the 2-bit display (10) b of the continuation number "2" and the content (00) b of the pixel data, are obtained. ,
It becomes the data unit CU01 * of the video data PXD after compression.

In other words, according to rule 1, the data unit C
(0000) b of U01 is (1) of data unit CU01 *.
000) b. In this example, no substantial bit length compression is obtained, but for example, the same pixel (00)
If b is three consecutive CU01 = (000000) b, CU01 * = (1100) b after compression, and 2
A bit compression effect is obtained.

According to rule 2 shown in the second column of FIG. 5, when 4 to 15 identical pixels continue, one unit of encoded data is constituted by 8-bit data. In this case, the first two bits represent a coded header indicating that it is based on rule 2, and the following 4
The bit represents the number of continuous pixels, and the subsequent two bits represent pixel data.

For example, the second compressed data unit CU02 of the video data PXD before compression shown in the upper part of FIG.
Are five 2-bit pixel data d2, d3, d4, d
5, d6 = (0101010101) b.
In this example, the same 2-bit pixel data (01) b is 5
It is continuous (continuous).

In this case, as shown in the lower part of FIG. 6, the encoded header (00) b, the 4-bit display (0101) b of the continuation number "5", and the content (01) b of the pixel data are connected. d2 to d6 = (00010101) b are the data units CU02 * of the compressed video data PXD.

In other words, according to rule 2, the data unit C
(0101010101) b of U02 (10-bit length)
Is (00010101) b (8) of the data unit CU02 *.
(Bit length). In this example, the effective bit length compression amount is only 2 bits from 10 bits to 8 bits. However, when the number of continuations is, for example, 15 (a 30-bit length in which 15 01s of CU02 are continuous), this is 8 bits. It becomes compressed data (CU02 * = 00111101),
A 22-bit compression effect is obtained for the bits. That is, the bit compression effect based on Rule 2 is greater than that of Rule 1. However, rule 1 is also required to support run-length compression of a fine image with high resolution.

According to rule 3 shown in the third column of FIG. 5, when 16 to 63 identical pixels continue, one unit of encoded data is constituted by 12-bit data. In this case, the first 4 bits represent an encoding header indicating that the rule is based on Rule 3, the following 6 bits represent the number of continuous pixels, and the subsequent 2 bits represent pixel data.

For example, the third compressed data unit CU03 of the video data PXD before compression shown in the upper part of FIG.
Are 16 2-bit pixel data d7 to d22 = (10
1010... 1010) b. In this example, 16 pieces of the same 2-bit pixel data (10) b are continuous (continuous).

In this case, as shown in the lower part of FIG. 6, an encoded header (0000) b, a 6-bit display (010000) b of the number of continuations "16", and the content of pixel data (10) b
And d7 to d22 = (000000100001)
0) b is the data unit CU of the compressed video data PXD
03 *.

In other words, according to rule 3, the data unit C
(101010... 1010) b (32-bit length) of U03 is (000000001000) of the data unit CU03 *.
010) b (12-bit length). In this example, the substantial bit length compression amount is 20 bits from 32 bits to 12 bits, but the continuation number is, for example, 63 (CU0
In the case of 63 consecutive 10s of 3 and a length of 126 bits, this is 12-bit compressed data (CU03 * = 00).
0011111110), and a compression effect of 114 bits can be obtained for 126 bits. That is, the bit compression effect based on Rule 3 is greater than that of Rule 2.

According to rule 4 shown in the fourth column of FIG. 5, when 64 to 255 identical pixels continue, one unit of encoded data is constituted by 16-bit data. In this case, the first 6 bits represent a coded header indicating that it is based on rule 4,
The subsequent 8 bits represent the number of continuous pixels, and the subsequent 2 bits represent pixel data.

For example, the fourth compressed data unit CU04 of the video data PXD before compression shown in the upper part of FIG.
Are 69 2-bit pixel data d23 to d91 = (1
11111... 1111) b. In this example, 69 pieces of the same 2-bit pixel data (11) b are continuous (continuous).

In this case, as shown in the lower part of FIG. 6, the encoded header (000000) b, the 8-bit display (00100101) b of the continuation number "69", and the content (11) b of the pixel data are connected. d23 to d91 = (000000)
0010010111) b is the compressed video data PX
D data unit CU04 *.

In other words, according to rule 4, the data unit C
(111111... 1111) b (138-bit length) of U04 is (00000000) of data unit CU04 *.
10010111) converted to b (16-bit length).
In this example, the substantial bit length compression amount is 122 bits from 138 bits to 16 bits, but the continuation number is, for example, 255 (because 11 of CU01 continue 255, 51
In the case of (0-bit length), this becomes 16-bit compressed data (CU04 * = 000001111111111), and a 494-bit compression effect is obtained for 510 bits. That is, the bit compression effect based on Rule 4 is
Larger than that of Rule 3.

According to rule 5 shown in the fifth column of FIG. 5, when the same pixel continues from the switching point of the encoded data unit to the end of the line, one unit of the encoded data is constituted by 16-bit data. In this case, the first 14 bits represent an encoded header indicating that the data is based on rule 5, and the following 2 bits represent pixel data.

For example, the fifth compressed data unit CU05 of the video data PXD before compression shown in the upper part of FIG.
Is one or more 2-bit pixel data d92 to dn = (0
00000... 0000) b. In this example, the same two-bit pixel data (00) b is continuous (continuous) in a finite number. However, in rule 5, the number of continuous pixels may be one or more.

In this case, as shown in the lower part of FIG. 6, d92 to dn = (0) connecting the encoded header (00000000000000) b and the content (00) b of the pixel data.
000000000000000000) b is the data unit CU05 * of the compressed video data PXD.

In other words, according to rule 5, the data unit C
(00000000 ... 0000) b (unspecified bit length) of U05 is (00000000) of data unit CU05 *.
00000000) b (16 bits long).
In rule 5, the same pixel continuation number up to the line end is 16
With a bit length or more, a compression effect can be obtained.

According to rule 6 shown in the sixth column of FIG. 5, when one pixel line in which data to be encoded is arranged ends, the length of one line of compressed data PXD is not an integral multiple of 8 bits (ie, When the data is not byte-aligned, 4-bit dummy data is added so that the compressed data PXD for one line is in units of bytes (that is, byte-aligned).

For example, data units CU01 * to CU05 * of the compressed video data PXD shown in the lower part of FIG.
Is always an integral multiple of 4 bits, but is not necessarily an integral multiple of 8 bits.

For example, data units CU01 * to CU05
If the total bit length of * is 1020 bits and 4 bits are insufficient for byte alignment, as shown at the bottom of FIG. 6, 4-bit dummy data CU06 * =
(0000) b is added to the end of the 1,020 bits to generate a byte-aligned 1024-bit data unit CU0.
1 * to CU06 * are output.

The two-bit pixel data arranged at the end of one unit does not necessarily indicate four types of pixel colors. That is, the pixel data (00) b indicates a background pixel of the sub-image, the pixel data (01) b indicates a pattern pixel of the sub-image, and the pixel data (10) b indicates the first pixel of the sub-image.
It may mean an emphasized pixel, and the pixel data (11) b may mean a second emphasized pixel of the sub-picture.

In this way, depending on the contents of the 2-bit pixel data, the run-length data can be selected from background pixels, sub-picture pattern pixels, sub-picture first emphasized pixels, and sub-picture second emphasized pixels. Can be determined.

If the number of constituent bits of the pixel data is larger, another type of sub-picture pixel can be specified. For example, when the pixel data is composed of 3-bit (000) b to (111) b, the maximum of eight types of pixel colors +
Pixel type (emphasis effect) can be specified.

FIG. 7 explains two examples (non-interlaced display and interlaced display) of how the character pattern "A" is encoded / decoded in the pixel data (sub-picture data). When decoding to interlaced display data, a line doubler that scans the same pixel line twice, a line with the same content #
10 would need to be rescanned in the even field.

In the example of FIG. 7, the video data (character pattern "A") to be encoded is a background pixel "."
Character pixel “#” represented by bit pixel data (00) b
Is represented by 2-bit pixel data (01) b, and the emphasized pixel “o” is represented by 2-bit pixel data (10) b.
The number of bits of the pixel data (00, 01, 10) (=
2) may be referred to as a pixel width.

For the sake of simplicity, in the example of FIG. 7, the display width of the video data (sub-video data) to be encoded is 9 pixels, and the number of scanning lines (display height) is 9 lines.

First, in encoding, pixel data (sub-picture data) obtained from a scanner is once converted into a run length value before compression by a microcomputer.

That is, taking the first line at the top of FIG. 7 as an example, three consecutive pixels “...” Are converted into (· * 3), and one subsequent “o” is converted into (o). * 1), one subsequent "#" is converted to (# * 1), one subsequent "o" is converted to (o * 1), and three subsequent pixels ".""." Is converted to (. * 3).

As a result, the pre-compression run-length data of the first line is “・ * 3 / o * 1 / # * 1 / o * 1 / １ ／ *
3 ". This data is composed of a combination of image information such as character pixels and the number of continuous pixels indicating the number of continuations.

Similarly, the pixel data strings on the second to ninth lines in the lower part of FIG. 7 are also converted to pre-compression run-length data strings. Next, compression processing is performed. Focusing on the data of the first line, since three background pixels “•” continue from the start of the line, compression rule 1 above is applied. As a result, the first “...” of the first line, that is, (· * 3) is “3” as shown in the upper part of FIG.
And the background pixel “·” (0)
0) and (1100).

Since the next data on the first line has one "o", the rule 1 is also applied. As a result, [o] next to the first line, that is, (o * 1) is 2 representing “1”.
The bit (01) and (10) representing the emphasized pixel “o” are encoded as (0110).

Since the next data has only one "#", rule 1 is also applied. As a result, the next [#] on the first line, that is, (# * 1), is encoded as (0101), which is a combination of two bits (01) representing "1" and (01) representing the character pixel "#". Is done. The portion related to # is surrounded by a broken line in the upper part of FIG.

Similarly, (o * 1) is encoded into (0110) and (· * 3) is encoded into (1100). As described above, the run-length data before compression for the first line “· * 3 / o * 1 / # * 1 / o * 1 / ·
* 3 ”means (1100) (0110) (0101) (0
110) Run-length compressed as in (1100)
The encoding of the first line is completed.

The compression rule 2 is applied to a portion where five “#” s on the fifth line are continuous. As a result, this (# * 5) on the fifth line has a 2-bit header (00) indicating that rule 2 has been applied, a 4-bit (0101) indicating the number of continuous pixels “5”, and a character pixel “ # ”(0
(1) is encoded to (00010101).

In the same manner, encoding proceeds up to the eighth line. In the ninth line, one line is occupied by the same background pixel “•”. In this case, compression rule 5 is applied. As a result, the uncompressed run-length data “• * 16” on the ninth line is the same as the background pixel “•”.
Is combined with a 14-bit header (00000000000000) indicating that the image data continues to the line end and 2-bit pixel data (00) indicating the background pixel “•”.
0).

The encoding based on the above rule 5 is as follows.
It is also applied when the data to be compressed starts from the middle of the line and continues to the end of the line. FIG. 8 shows the data structure of the sub-picture unit again.

The sub-picture unit is composed of, for example, a plurality of sub-picture packets as described with reference to FIG. That is, one pack of the sub-picture information included in the video data is composed of, for example, 2048 bytes (2 kB). One pack of the sub-picture information includes one or more sub-picture packets after the head pack header. In the pack header,
System clock reference (SCR) information serving as a reference is provided through the reproduction of the entire file, and sub-picture packets in a pack of sub-picture data provided with the SCR of the same time information are transferred to a decoder described later. It is supposed to be. The first sub-picture packet is composed of run-length compressed sub-picture data (SP) together with a sub-picture unit header (SPUH) after the packet header. DATA1). Similarly, the second sub-video packet has, after its packet header,
Run-length compressed sub-picture data (SP DATA
2) is included.

Such a plurality of sub-picture data (SP D
ATA1, SP DATA2,...) For one unit (one unit) of run-length compression is a sub-picture data unit 30.

The sub-picture data unit 30 includes a sub-picture header (SPUH) 31 and a sub-picture data (PXD) 3
2 and the display control sequence table (SP DCSQ
T) 33.

In the packet header of the above-mentioned packet,
The time at which the playback system should start the display control of the sub-picture data unit is recorded as a presentation time stamp (PTS). However, the PTS is recorded only in the header of the first sub-picture data packet in each sub-picture data unit (Y, W), as shown in FIG. In the PTS, in a plurality of sub-video data units reproduced at a predetermined reproduction time SCR, values along the reproduction order are described for each sub-video data unit.

FIG. 10 shows a serial arrangement state (n, n + 1) of sub-picture units composed of one or more sub-picture packets.
And the time stamp PTS described in the packet header of one of the units (n + 1), and the display control progress status of the unit (n + 1) corresponding to this PTS (the display clear of the previous sub-picture and the display from now on) Designation of a sub-picture display control sequence).

As shown in FIG. 11, the sub-picture unit header (SPUH) 31 includes the size of the sub-picture data packet (SPCSZ of 2 bytes) and the recording start position (2 bytes) of the display control sequence table 33 in the packet. S
P DCSQTA) is recorded.

The SPCSZ describes the size of one unit by the number of bytes, and the maximum size is 53248 bytes. SP DCSQTA is a display control sequence table (SP) based on the number of bytes relative to the first byte of the unit. DCSQT) is described.

As shown in FIG. 12, the display control sequence table (SP DCSQT) 33 includes one or more sub-picture display sequences (SP DCSQ0, SP DCS
Q1, ... SP DCSQn).

FIG. 13 shows the sub-picture display sequence (S
P DCSQ). This SP
The following contents are described as parameters of DCSQ.

When the execution of the video data display control is started
Sub-picture display control start time (SP DCS
Q STM; Sub-Picture Display Control Sequence
Start Time) and the next sub-picture display control sequence (SP
Address (SP) representing the destination of description of DCSQ NXT
DCSQ SA; Addres of Next SP DCSQ)
Image data display control command (SP COMMAND;
Sub-Picture DisplayControl Command) (SP CO
MMAND1, SP COMMAND2, SP COMM
AND3,...) Are recorded.

Here, the time stamp PTS (see FIG. 8) in the packet header 3 is used as a reference time (SCR; System) during reproduction of the entire file, such as the reproduction start time at the beginning of the file (see FIG. 2). Clock Refer
ence). This SCR
Is described in a pack header provided before the packet header 3.

The display control sequence execution start time (SP
DCSQ (STM) is defined by a relative time (relative PTM) from the PTS described in the packet header. Control starts from the first video frame after the execution start time is described. Display control sequence execution start time (SP DCSQ "0000h" is described in STM). The execution start time is equal to or longer than the PTS described in the sub-picture packet header, and is a positive integer from 0. Based on the display control start time, one (SP) When the command in the DCSQ is executed, the next designated (SP The execution process is started when the command in the DCSQ) reaches the display control start time.

SP NXT DCSQ SA is indicated by the relative number of bytes from the first sub-picture unit, and the next SP
It shows the DCSQ address. Next SP DCS
If there is no Q, the start address of the first SP DCSQ is described by the relative number of bytes from the first byte of the sub video unit of this SP DCSQ.

SP DCCMDn describes one or more display control sequences. In FIG.
Display control command (SP DCC
MD).

The display control command (SP DCCMD) includes an instruction (FSTA) for setting a compulsory display start timing of pixel data. DSP), an instruction to set the display start timing of the pixel data (STA) DSP),
Command to set the display end timing of pixel data (S
TP DSP), instruction to set color code of pixel data (SET COLOR), an instruction to set the contrast between the pixel data and the main image (SET CONT
R), an instruction to set a display area for pixel data (SE)
T DAREA), an instruction to set the display start address of the pixel data (SET DSPXA), an instruction (C) for setting a change control of color and contrast of pixel data
HG COLCON), a command to end the display control (C
MD END). The respective codes and extension fields are as follows as shown in the figure.

That is, a compulsory display start timing command (FSTA The code of the DSP is 00h and the extension field is 0 bytes. When this instruction is described, the forced display of the sub-picture unit having this code is executed regardless of the display state of the sub-picture.

Display start timing command (STA) DS
The code of P) is 00h, and the extension field is 0 bytes. This command is a display start command of the sub-picture unit. This command is ignored in the operation of turning off the display of the sub-picture.

Display stop timing command (STP DS
The code of P) is 02h, and the extension field is 0 bytes. This command is a display stop command of the sub-picture unit. The sub-picture can be redisplayed by the previous display start command.

A color code setting instruction (SET COLO
The code of R) is 03h, and the extension field is 2 bytes. This command is a command for determining the color of each pixel of the pixel data, and is described in the extension field by a pallet code. The second pallet code for each pixel
Each palette code is described for an enhancement pixel (4 bits), a first enhancement pixel (4 bits), a pattern pixel (4 bits), and a background pixel (4 bits).

Here, this instruction (SET COLOR)
Is not present in the sub-picture unit, the last one used before is maintained, and this instruction is used. This instruction is specified at the beginning of each line.

The contrast setting command (SET CONT
The code of R) is 04h, and the extension field is 2 bytes. This command is a command for setting a mixing ratio between the pixel data and the main image, and is described in the extension field by contrast designation data. The contrast designation data of the pixel includes a second emphasized pixel (4 bits), a first emphasized pixel (4 bits), a pattern pixel (4 bits),
Since there is a background pixel (4 bits), contrast designation data k for each pixel is described.

The contrast of the main image is (16-k) / 1
6, the contrast of the sub-picture is k / 16. 16 is a gradation. The value may be "0", in which case the sub-picture does not appear on the screen even though it exists. If the value is not “0”, k is (value + 1)
Is treated as

Here, this instruction (SET CONTR)
Is not present in the sub-picture unit, the last one used before is maintained, and this instruction is used. This instruction is specified at the beginning of each line.

Display area setting command (SET DARE
The code of A) is 05h, and the extension field is 6 bytes. This command is a command for setting a display area of square pixel data on the screen. In this instruction:
The start position (10 bits) and end position (10 bits) of the X-axis coordinates on the screen, and the start position (10 bits) and end position (10 bits) of the Y-axis coordinates are described. The remaining bits of the 6 bytes and the reservation are reserved. The value at the start position of the X-axis coordinate is subtracted from the value at the end position of the X-axis coordinate, and +1
Should be the same as the number of display pixels on one line. The origin of the Y-axis coordinate is line number 0. The origin of the X-axis coordinate is also 0. On the screen, it corresponds to the upper left corner. The Y-axis coordinate value is 2 to 479 (525 lines / 60 Hz
TV) or 2-574 (625 lines / 50H
z TV), whereby the sub-video line is specified, and the X-axis coordinate value describes a value of 0 to 719, thereby specifying the pixel number.

Here, this instruction (SET DAREA)
Does not exist in the sub-picture unit, the command included in the last sub-picture unit sent earlier is used as it is.

Display start address setting instruction (SET DS
PXA) is 06h, and the extension field is 4 bytes. This command is a command indicating the first address of the image data to be displayed. The first addresses of the odd field (16 bits) and the even field (16 bits) are described by the relative number of bytes from the head of the sub-picture unit. The first pixel data at the position indicated by this address indicates a run-length compression code including the first pixel at the left end of the line.

Here, this instruction (SET DSPXA)
Does not exist in the sub-picture unit, the command included in the last sub-picture unit sent earlier is used as it is.

Color and contrast change control command (C
HG The code of (COLON) is 07h, and the extension field is (pixel control data size + 2 bytes).
Here, the above (pixel control data (PXCD) size + 2
The total number of bytes varies depending on the contents of control, and the amount of data may be very large. The control data of will be described later in detail. (CMD
The code of END) is FFh, and the extension byte is 0 byte.

FIG. 15 shows the above (CHG) COLON)
Pixel control data (PXC) described in the extension field of
D; Pixel Control Data). This P
XCD is data for controlling the color and contrast of pixels displayed as sub-pictures during a display period. PXC
The instruction described in D is a sub-picture display control start time (SP
DCSQ STM) is performed on each video frame from the first video frame after being described, and the next new P
Executed until XCD is set. New PXCD
PXCD is canceled when is updated.

The line control information (LN) shown in FIG. CT
LI (Line Control Information) specifies a line in which the change control of the sub-picture is performed. A plurality of lines on which the same conversion control is performed can be designated. The pixel control information (PX CTLI; Pixcel Control Informati
on) describes the designated position on the line where the change control is performed. One or more pixel control information (PX CTLI)
Can specify a plurality of positions on a line where conversion control is performed.

As the end code of the pixel control data (PXCD), (0FFFFFFFh) describes LN CTLI. P such that only this end code exists
When XCD arrives, (CHG COLON) means the end of the instruction itself.

Referring to FIG. 16, each of the above instructions will be further described. LN The CTLI is composed of 4 bytes, and includes a line number (10 bits) at which the change of the sub-picture starts, a change number (4 bits), and an end line number (1).
0 bit). The change start line number is a line number at which the change of the pixel control content starts, and is described by the line number of the sub-picture. The end line number is a line number at which the control state based on the pixel control content is stopped, and is also described by the line number of the sub-picture. The number of changes is the number of change positions, and the pixel control information (PX CTLI) number. The line number at this time is, of course, 2 to 479 (the TV system has 525 lines / 60
Hz), or 2 to 574 (the TV system is 6
25 lines / 50 Hz).

Next, one pixel control information (PX) CTL
I) is composed of 6 bytes and describes a change start pixel number (10 bits) and control information for changing the color and contrast of each pixel following the pixel.

A palette code for a pixel is for a second emphasized pixel (4 bits), for a first emphasized pixel (4 bits),
For pattern pixels (4 bits), for background pixels (4 bits)
Each pallet code is described. Also, the contrast designation data for the second emphasized pixel (4 bits), the first emphasized pixel (4 bits), the pattern pixel (4 bits), and the background pixel (4 bits) are described as the contrast designated data for the pixel. Have been.

The above change start pixel numbers are described by the pixel numbers in the display order. When this is zero, SET CO
LOR and SET CONTR is ignored. A color pallet code is described as the color control information, and the contrast designation data is described as the contrast control information as described above.

When no change is requested in each of the above control information, the same code as the initial value is described.
The initial value is a color code and contrast control data (see FIG. 14) specified from the beginning to be used for the sub-picture unit.

Next, the characteristic portions of the present invention will be described. The present invention focuses on the fact that the data recorded (or transmitted) as the display control sequence table described above has an extremely large data amount. Recording (or transmission) with such a display control sequence command added to each sub-picture unit is not preferable in terms of effectively using the capacity of a recording medium or a transmission path.

Therefore, in the present invention, as described above, when there is no change in the content of the command, the reproducing (or receiving) side effectively utilizes the command used last time and repeats the command on the recording medium for each unit. It is not recorded (or transmitted).

As shown in FIG. 17, a sub-picture display control command (hereinafter referred to as SP DCCMD SAMPLE
) Is prepared, and a 43-byte command is required as this command. The same content as this command is used for a plurality of sub-picture units (SPUs). Then, in such a case, as shown in FIG. 18, (SP) is added to the first sub-picture unit. D
CCMD SAMPLE) Addition and transmission (or recording)
However, the subsequent units will be omitted.

In such a case, the data amount of {43 bytes × (the number of units−1)} can be omitted, and the capacity of the transmission path and the recording medium can be effectively used.
Next, a sub-picture data processing device for processing the above-described sub-picture data will be described.

Referring to FIG. 19, a disk 100 is mounted on a turntable (not shown) and is driven to rotate by a motor 102. If you are in playback mode now,
Information recorded on the disk 100 is transmitted to the pickup unit 1
02 is picked up. Pickup unit 102
Are controlled by the servo unit 103 for movement control, focus control, and tracking control in the radial direction of the disk. The servo unit 103 also sends a control signal to the motor drive unit 104 to rotate the motor 101 (that is, the disk 10).
0) is performed.

The output of the pickup unit 102 is
05 and demodulated. The demodulated data demodulated here is input to the data processing unit 106. The data processing unit 106 performs error correction processing of demodulated data, separation processing of each data, and the like. The signal processing unit 106 separates and derives main video information, sub-video (captions and text) information, audio information, control information, and the like. In other words, the disc 100 has sub-picture (caption and text) information corresponding to the picture information,
This is because audio information, management information, control information, and the like are recorded.

In this case, various languages can be selected as subtitles and character information as sub-picture information and audio information, which are selected under the control of the system control unit 200. An operation input by a user is provided to the system control unit 200 through the operation unit 201.

The main video information separated by the data processing unit 106 is input to the main video decoder 107, and subjected to a decoding process corresponding to the type of the display device. For example, NTS
It is converted to C, PAL, SECAM, wide screen, and the like. The audio information (audio information) separated by the data processing unit 106 is audio information of a stream specified by the user, and the audio information is input to the audio decoder 108 and decoded.

Further, the sub-picture separated by the data processing unit 106 is sub-picture data of a stream designated by the user.
00 and decoded. Sub-picture decoder 30
The video signal decoded by 0 and the main video decoder 107 is input to the adder 109, superimposed and output. Then, it is supplied to a display (not shown).

Next, the internal configuration of sub-picture decoder 300 will be described. First, when giving a desired packet to the packet capturing unit 301, the data processing unit 106
The identification is performed by the stream ID described in the packet header. On the other hand, the designated stream ID is stored in a predetermined register of the register unit 320 through the system processor 200 responding to a user operation.
The packet where the specified stream ID and the input stream ID match is provided to the packet capturing unit 302.

Therefore, the sub-picture data separated by the data processing unit 106 is sent to the sub-picture decoder 300 in packet units. This packet is supplied to the packet capturing unit 301. The packet captured by the packet capturing unit 302 is temporarily sent to the memory 302 and stored therein.

By the above processing, one or more sub-picture units are stored in the memory 302. The sub-picture decoder control unit 310 refers to the sub-picture unit header (SPUH) included in the sub-picture unit, and recognizes the size and address. As a result, the run-length compressed data (PXD) is sent to the run-length decoder 303 by the display control sequence table (SP). DCSQT) is sent to sequence control section 304.

Then, the run length data (PXD) is
The data is decoded by the run-length decoder 303. This decoding process is executed according to the rules described with reference to FIG. The decoded pixel data is sent to the sequence control unit 3
The data is accumulated in the buffer memory 305 via the buffer 04 and waits for the output timing. On the other hand, the display control sequence table (SP SCQT)
Is input to the sequence control unit 304 and analyzed.

The sequence control section 304 has a plurality of registers for holding various control instructions (described with reference to FIGS. 12 to 16). This part is stored in the command register 304A.
And The sequence control unit 304 determines what color and / or contrast is to be set and output for the next pixel to be output in accordance with the command of the register. This determination signal is provided to the output control unit 306. The sequence control unit 304 also controls the buffer memory 3
A readout timing signal and an address of the pixel data held at 05 are also given.

In the output control unit 306, the buffer memory 3
05 from the sequence controller 30
Then, a color code and / or contrast data corresponding to the command from No. 4 is added and output to the adder 109.

Here, the sub-picture decoder sends a display control command (SP) to the sub-picture units transmitted one after another.
Even if DCCMD) is not included, the previous display control command is maintained and used again. This is because, when such a function is provided, the recording capacity and transmission capacity of the entire sub-picture data can be significantly reduced as described with reference to FIGS.

The display control will be further described. In display control, the command SET The display position and display area of the sub-picture are set by DAREA, and the command SE
T The display color of the sub-picture is set by COLOR, and the command SET The contrast of the sub-picture with respect to the main picture is basically set by the CONTR. These are basic commands.

Then, the display start timing command STA
After executing the DSP, another display control sequence DCSQ
To end display instruction STP Until the DSP is executed, the color and contrast switching command CHG is displayed during the display. While performing display control based on COLCON,
Run-length compressed pixel data PXD (32)
Is decoded.

FIG. 20 shows the above-mentioned sub-picture decoder 300.
Is schematically shown. Packet capturing unit 30
1 fetches a video packet of a desired stream separated and sent from the data processing unit 106 and stores it in the high-speed write / read memory 203 (step S1,
S2, S3, S4, S5). It is determined whether at least the sub-picture unit header (SPUH) has been constructed (step S6). When one or more sub-picture units are constructed in the memory 203, the sub-picture unit enters a standby state.

On the other hand, the display control sequence operation is as follows. The separation processing of the data stored in the memory 203 is performed. The sub-picture unit header (SPUH) is referred to by the decoder control unit 310 to separate the data, and the run-length data is stored in the run-length decoder 3.
03 (steps S11 and S12). Display control sequence table (SP DCSQT) data is transferred to the sequence control unit 304.

Next, the PTS transmitted in the first packet of the sub-picture unit is compared with the internal counter value, for example, in the upper digit, and it is determined whether display control is to be started. Here, when a match is obtained and it is determined that it is the display control start timing (step S14), a specific display control process (step S16) is executed. At this time, the fine control timing after shifting to each control is determined by each SP. SP included in DCSQ DCSQ
It is managed by STM.

If it is determined in step S14 that the PTS sent in the packet does not match the internal counter value, it is determined in step S15 whether data separation and extraction have been completed. In
The process is in a standby state until the display control start time is reached, and if data extraction is not completed, the process returns to step S12 to perform data separation processing.

During the display control period in step S16, it is checked whether data of the next new sub-picture unit has arrived, for example, during the vertical blanking period. If not, step S16
Display control is performed. If it has arrived, in step S18, the new SP attached to the new sub-picture unit A check is made to see if a DCSQT has arrived.

Here, a new SP If the DCSQT has not arrived, it means that only the pixel data has changed, and the process returns to step S12 to cut out a new PXD from the memory. If the new SP in step S18 If it is determined that the DCSQT has arrived, which means that the entire sub-picture unit has been updated, it is determined in step S19 whether or not it is the display control start timing. This determination is also made during the vertical period, for example, to determine whether the PTS sent in the first packet of the sub-picture unit matches the internal counter value. If they do not match, the previous display control is continued, and if they do match, step S
Returning to step 12, switching to the processing of a new sub-picture unit is performed.

A more detailed description of the processing procedure of the display control sequence control unit 304 will be added. (1) First, the display control sequence table SP DCS
First SP of QT The control start time (SP) recorded in DCSQ0 DCSQ STM) is compared with the internal count value of the sub-picture decoder. Sub-picture decoder 300
For example, the decoder control unit 310 includes a counter that counts the system clock in synchronization with the transmitted video data and that matches the transmitted system clock reference value. It is a timing reference.

(2) As a result of the above comparison, the internal count value
Is the control start time (SP DCSQ Greater than STM)
If not, all displays in the display control sequence table
Control command SP COMMAND is executed and the display
End command CMD Run until END appears
You. Display control end command CMD When there is no END
In this case, the same display control is repeatedly performed.

(3) After the display control is started, the sub-picture display control time SP recorded in the next display control sequence table DCSQT is performed at regular intervals (for example, every vertical blanking period). DCSQ By comparing the STM with the internal count value, the next DCSQT is updated, that is, the DCSQT pointer of FIG.
Whether to move to SQT) is determined.

Here, the control start time SP in the display control sequence table DCSQ The STM is recorded at a relative time since the PTS was updated (that is, since the sub-picture data unit was updated). Therefore, even when the same sub-video data is displayed and controlled at a plurality of different times in the same manner as in the previous display, the same display control sequence table SP is used. DCSQT can be used. That is, the display control sequence table can be made relocatable.

In the above decoding process, the display control end command CMD When the END is executed, the decoding processing of the sub-picture data in the sub-picture buffer memory 302 ends. This decoding processing is performed by the end command CMD. END
Is repeated as long as is not executed (steps S5 to S
10).

In the above description, the decoding processing of the sub-picture unit recorded on the disc has been described. However, the above-described recording and transmission have many advantages in each unit. First, it is effective to improve the density by making the recording capacity of the recording medium efficient. Also, the transmission efficiency can be improved in the data transmission path. Further, data processing such as buffering and error correction of the transmission path can be efficiently performed. Since the data amount can be further reduced, the software load on the data processor of the reproducing apparatus and the recording apparatus can be reduced.

In the above description, run-length compression and display control can be applied to sub-picture data. In FIG. 21, the above-described sub-video data is generated,
1 schematically illustrates a system for creating a video disc.

Reference numeral 401 denotes an operation unit which can take in characters such as subtitles from a keyboard or a reader such as a camera and display them on a display 402. When the predetermined target data is displayed, it is sent to the run-length compression unit 403. The run-length compressed pixel data is supplied to the decoding unit 40.
4 and is displayed on the display 405 as a monitor. In order to perform display control on the displayed characters such as captions, a control code is provided from the operation unit 401. By operating the keyboard, a color code and a contrast identification code are given, and furthermore, by giving coordinate data such as X-axis coordinates and Y-axis coordinates with a mouse or a cursor operator, an area is specified and a character is specified.
In addition, a background can be specified. As a result, the sub-video display control sequence table becomes SP DCSQT
Created by the creating unit 406 and given to the display control unit 407. This display control unit 407 performs the same operation as the sequence control unit described above, By analyzing the DCSQT, the display 405 can display the sub-image whose display is controlled.

Here, the creator creates and adjusts various parameters of the display control data to determine final parameters. When this determination is made, the PXD, SP SP from DCSQT creation unit 406 DCSQT is provided to unit creation section 408. Here, a sub-picture unit header is created from the input unit. Also, the size, display area, and the like are confirmed on the operation unit.

When the sub-picture unit is created,
It is recorded once in the sub-picture recording / reproducing device 409.
The sub video data reproduced and output from the sub video recording / reproducing device 409 is supplied to the editing device 413. This editing device 4
13, the main video (compressed) from the main video reproducing device 411 and the audio information (compressed) from the audio reproducing device 412 are also supplied. The editing device 413 edits the logical configuration as described with reference to FIG. 2, and records the result on the recording medium 414.

[0136]

As described above, according to the present invention, attention is paid to the point that the data recorded (or transmitted) as the display control sequence table has an extremely large data amount. Commands are repeatedly added to each sub-picture unit to prevent recording (or transmission), and to effectively use the capacity of a recording medium or a transmission path.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a recording data structure of an optical disc as an example of an information storage medium to which the present invention can be applied.

FIG. 2 is a view exemplifying a logical structure of data recorded on the optical disc of FIG. 1;

FIG. 3 is a view exemplifying a logical structure of a sub-picture unit in the data structure illustrated in FIG. 2;

FIG. 4 is an exemplary view exemplifying the contents of a unit header of the sub-picture unit illustrated in FIG. 3;

FIG. 5 is an exemplary view for explaining compression rules 1 to 6 employed in a run-length encoding method for obtaining pixel data (PXD) of a sub-picture unit illustrated in FIG. 4;

FIG. 6 is a diagram specifically explaining compression rules 1 to 6 employed in the encoding and decoding method according to the embodiment of the present invention when the pixel data illustrated in FIG. 4 is composed of 2 bits. .

FIG. 7 is an exemplary view for explaining encoding and decoding processing according to an embodiment of the present invention in association with specific characters when the pixel data illustrated in FIG. 4 is composed of 2 bits;

FIG. 8 is a diagram shown to explain the configuration of the sub-picture unit again.

FIG. 9 is a view for explaining a plurality of connections of the sub-picture unit.

FIG. 10 is a view shown for explaining the connection of display periods of the sub-picture units.

FIG. 11 is a view shown for explaining a configuration of a header of the sub-picture unit.

FIG. 12 is a table (SP) of FIG. DCSQT) parameters (SP FIG. 9 illustrates the contents of DCSQ).

FIG. 13 shows a display control command (S
P FIG. 3 is a view for explaining the contents of DCCMD).

FIG. 14 shows a display control command (S
P FIG. 3 is a view for explaining the contents of DCCMD).

15 is a display control switching command (CHG) shown in FIG.
FIG. 4 is a view for explaining the contents of pixel control data (PXCD) in (COLCON).

FIG. 16 shows the line control information (LN CTLI)
And pixel control information (PX The figure explaining the content of CTLI).

FIG. 17 is a diagram showing an example of a sub-picture display control command.

FIG. 18 is a view for explaining an example of a recording or transmission method and a transmission structure of a sub-picture display control command.

FIG. 19 is a diagram showing an example of an optical disc reproducing apparatus to which the present invention is applied.

FIG. 20 is a flowchart for explaining an operation example of a main part of the apparatus of the present invention.

FIG. 21 is a diagram showing a processing system for generating sub-video data and creating a video disc.

[Explanation of symbols]

 Reference Signs List 30 ... Sub-picture unit 31 ... Sub-picture unit header SPUH 32 ... Sub-picture pixel data PXD 33 ... Display control sequence table DCSQT 101 ... Motor 102 ... Pickup 103 ... Servo unit 104 ... Motor drive unit 105 ... Demodulation unit 106 ... Data processing Unit 107 Main video decoder 108 Audio decoder 109 Adder 200 System processor 201 Operation unit 300 Sub-video decoder 301 Packet capture unit 302 Memory 303 Run-length decoder 304 Sequence control unit 305 Buffer memory 306 ... Output control unit.

Claims (9)

[Claims] An object data is compressed by a predetermined data compression method and divided into a plurality of compressed data blocks, and pixel data when each compressed data block is decoded is controlled by display control data. When a display control data block is added to the compressed data block and recorded, if the display control content for the succeeding next compressed data block is the same as the display control content for the preceding compressed data block, the next A video data recording medium characterized in that the addition of a corresponding display control data block to the compressed data block is omitted, and the display control data block is additionally recorded only in the preceding compressed data block. 2. The display control data included in the display control data block includes a color control command for setting a color code of corresponding pixel data, a contrast control command for setting contrast, and a display area for setting a display area. 2. The video data recording medium according to claim 1, wherein the display data is display control data including any one of the control commands. 3. The display control data included in the display control data block includes a basic color control command for setting a basic color code of corresponding pixel data, a basic contrast control command for setting a basic contrast, and a basic display area. A basic command group based on a basic display area control command for setting an individual color code, an individual color control command for setting an individual color code, and setting an individual contrast The video data recording medium according to claim 1, further comprising: an individual command group such as an individual contrast control command and an individual display area control command for setting an individual display area. 4. The method according to claim 1, wherein the target data is compressed by a predetermined data compression method and divided into a plurality of compressed data blocks, and pixel data when each compressed data block is decoded is controlled by display control data. In the case where the display control data block is added to the compressed data block and recorded, if the display control content for the succeeding compressed data block is the same as the display control content for the preceding compressed data block, the next A video data recording method, wherein the addition of a display control data block corresponding to a compressed data block is omitted, and a display control data block is added and recorded only to the preceding compressed data block. 5. The display control data included in the display control data block includes a color control command for setting a color code of corresponding pixel data, a contrast control command for setting contrast, and a display area for setting a display area. The video data recording method according to claim 1, wherein the display data is display control data including any one of the control commands. 6. The display control data included in the display control data block includes a basic color control command for setting a basic color code of corresponding pixel data, a basic contrast control command for setting a basic contrast, and a basic display area. A basic command group based on a basic display area control command for setting an individual color code, an individual color control command for setting an individual color code, and setting an individual contrast 5. The video data recording method according to claim 4, further comprising an individual command group having an individual contrast control command, an individual display area control command for setting an individual display area, and the like. 7. A method according to claim 1, wherein the target data is compressed by a predetermined data compression method to be divided into a plurality of compressed data blocks, and pixel data when each compressed data block is decoded is controlled by display control data. When a display control data block is added to the compressed data block and recorded, if the display control content for the succeeding compressed data block is the same as the display control content for the preceding compressed data block, the next In this device, the addition of a display control data block corresponding to the compressed data block is omitted, and a video data recording medium on which a display control data block is added and recorded only to the preceding compressed data block is reproduced. Means for capturing and decoding the compressed data block to obtain decoded data; The display control data is generated by taking in the data block, and the display state of the decoded data is displayed and controlled. When the next compressed data block in which the display control data block is omitted arrives, the display control currently held is performed. An apparatus for reproducing video data, comprising: a sequence control unit using data. 8. The display control data included in the display control data block includes a color control command for setting a color code of corresponding pixel data, a contrast control command for setting contrast, and a display area for setting a display area. 8. The video data reproducing apparatus according to claim 1, wherein the display data is display control data including any one of the control commands. 9. The display control data included in the display control data block includes a basic color control command for setting a basic color code of corresponding pixel data, a basic contrast control command for setting a basic contrast, and a basic display area. A basic command group based on a basic display area control command for setting an individual color code, an individual color control command for setting an individual color code, and setting an individual contrast 8. The video data reproducing apparatus according to claim 7, further comprising: an individual command group having an individual contrast control command, an individual display area control command for setting an individual display area, and the like.