CN1341328A - Playback apparatus and method for playback of record carrier - Google Patents

Abstract

A playback apparatus of the invention comprises reading means (410) for reading an information stream (S0) from a record carrier (1) and demultiplexing means (430) for separating at least a first and a second sub-stream (S1, S2) from the information stream (S0), which first sub-stream (S1) comprises encoded video data and which second sub-stream (S2) comprises graphics data. The apparatus further comprises first decoding means (441) for decoding the first sub-stream (S1) and second decoding means (480) for receiving the second sub-stream (S2) and for decoding graphics data encoded according to a first format (DVD Video sub-picture format). The apparatus further comprises combining means (457) for combining the decoded video stream (S11) and the decoded graphics data (S21). The apparatus is characterized by converting means (450) for receiving a second sub-stream (S2) of graphics data encoded according to a second format (SVCD OGT-format) and characterized by selecting means (470) for selecting the converted graphics data or the data according to the first format from the second stream as input data for the second decoding means.

Description

Record carrier playback device and playback method

technical field

The invention relates to a playback device for playback of a record carrier, the device comprising

- reading means for reading the information stream from the record carrier,

- signal decomposition means for separating at least first and second sub-streams from the stream,

The above-mentioned first sub-information stream includes coded video data and the second sub-information stream includes graphics data,

- first decoding means for decoding the first sub-stream,

- second decoding means for receiving the second sub-stream and for decoding the graphics data encoded according to the first format,

According to the above-mentioned first format, the graphic data includes a header containing information about the size of the graphic data and an instruction table address, and the graphic data also includes data that assigns a pixel value to each pixel of a group of pixels, and the pixel value refers to The chromaticity code is the corresponding item in the chromaticity lookup table. The instruction table includes one or more graphics instructions for controlling the display of graphics data.

- Merging means for merging the encoded video stream and the decoded graphics data.

The invention also relates to a method for reproducing a record carrier.

technical background

The device known from EP 0 849 681 A1 comprises decoding means in the form of a sub-picture decoding unit which decodes a sub-picture unit of a record carrier according to the DVD-Video standard. Such a sub-picture unit (SPU) includes a header, data assigning pixel values to each of a group of pixels (the data may be run length coded), and a sequence of display control commands. The sub-picture decoding unit includes a memory for storing a first sub-picture and a second sub-picture, wherein the first sub-picture is a sub-picture currently being displayed, and the second sub-picture is a sub-picture to be displayed. The sub-picture decoding unit also includes a first decoding unit for processing display control instructions, a persistence-length coding unit for decoding the duration-coded data into a bitmap, and a sub-picture unit for generating actual sub-pictures. The merging device combines the generated sub-picture sequence with the video data stream from the video decoder to obtain a synthesized video stream. In addition to the first and second sub-streams, the record carrier for duplication by the playback device may contain other sub-streams, for example further sub-streams comprising graphic data or audio data.

The SVCD standard version 1.0 describes record carriers for video and overlay graphics data. Graphical data under this standard conforms to the second format. Overlay graphics data is stored in so-called overlay graphics and text pages (OGT-pages). An OGT-page includes a header, chrominance look-up table data, and optionally pixel data. The latter should be duration-length encoded, but this is according to other compression rules than those allowed by the DVD-Video standard. Data further coded according to the SVCD standard duration length assigns each pixel of the OGT-page a chroma code which directly corresponds to an entry in the chroma look-up table. In contrast in the DVD-Video sub-picture format, several pixels are assigned a pixel value which corresponds to a chrominance code which corresponds to an entry in the chrominance look-up table. The above known devices are not suitable for duplicating record carriers according to the SVCD standard.

Summary of the invention

It is an object of the invention to provide a device of the kind described in the preceding introduction which is capable of duplicating record carriers both according to the DCD video standard and according to the SVCD standard. The device according to the invention is characterized in that it also includes

- converting means for receiving a second sub-stream of graphic data encoded in a second format and converting said graphic data from a second format to a first format, according to which the second format graphic data contains a The header and flags of the graphics data size information to indicate whether the graphics data further includes

a first chromaticity lookup table and information defining the first region, and/or

a second chromaticity lookup table and information defining a second region, and/or

a tertiary chromaticity lookup table and information defining a tertiary region, and/or

Give each of a group of pixels a set of continuous length coded data of a chroma code, wherein the chroma code corresponds to an item in the chroma look-up table, the second chroma look-up table is applied to the second area, and the third The chromaticity look-up table is applied to the third area, and the first chromaticity look-up table is applied to the part of the first area that does not match the second or third area.

- selection means for selecting one of the converted graphics data or data from the second information stream encoded in the first format as input data to the second decoding means.

The flag bits of the OGT-page indicate whether optional parts of the page are present, such as continuous length coded data or CLUT_DATA, ie the first chrominance look-up table and fields corresponding thereto. If the flag indicates a missing part, the OGT-page to be displayed will be reconstructed based on the corresponding part loaded earlier. For example, if the OGT-page to be displayed only includes CLUT_DATA as an optional part, then the already loaded continuation length encoded data is used.

Since the conversion device converts the OGT-graphics stream into a sub-picture stream, the sub-picture decoding unit of the device according to the invention is used both for copying sub-picture data from a DVD-Video disc and for copying overlaid graphics and text data from a SVCD-disc.

Separate decoding means for reconstructing the graphics image from the second sub-stream encoded according to the second graphics format are superfluous.

Brief description of the drawings

These and other aspects of the invention will be described in more detail with reference to the accompanying drawings.

Accompanying drawing 1 has shown schematically the playback device of the present invention,

Figure 2 schematically illustrates the first graphic format,

Figure 3 illustrates the meaning of pixel values in the first graphics format,

Figure 4 illustrates the meaning of the duration-length encoding in the first graphic format,

Figure 5 illustrates the second graphic format,

Figure 6 schematically shows the operation of the conversion device,

Figure 6A shows one aspect of the above operation in more detail,

Figure 6B shows another aspect of the above operation in more detail,

Figure 7 shows a template of the instruction table,

Figure 8 illustrates the conversion of persistent-length encoded data conforming to the second format into persistent-length encoded data conforming to the first format,

Figure 9 shows an example of a chroma look-up table conforming to the second format,

Figure 10 shows a part of the chromaticity look-up table according to the first format and corresponding to the chromaticity look-up table of accompanying drawing 9,

Figure 11 shows an example of a highlighted region defined by the second format,

Fig. 12 has shown the first kind of graphic format definition, corresponds to the part instruction table of the data shown in accompanying drawing 9 and 11,

Figure 13 shows a part of the playback device in more detail.

Detailed description of the invention

Figure 21 shows a playback device suitable for playback of the record carrier 1 . The playback device comprises reading means 410 for reading the information stream S0 from the record carrier 1 . The readout means 410 are provided with control means 411 which control the reading of the information stream S0 from the record carrier 1 by instructions from the central processing unit 421 with address signals 412 . The output 413 of the reading device 410 is coupled to the system bus 420 of the computer system to provide the read information stream S0 via a data signal path 414 . The playback device above also includes a signal decomposing device 430 for separating at least the first sub-information stream S1 and the second sub-information stream S2 from the information stream S0 to the first output terminal 431 and the second output terminal 432 respectively. The signal decomposition device 430 is controlled by the control signal Su' generated by the central processing unit 421. The first sub-information stream S1 includes coded video data. The video data S1 is preferably coded in MPEG format. Graphic data is included in the second sub-stream S2. The signal decomposition means 430 also separates a third sub-stream S3 from the stream containing audio data to an output 433 . The output terminal 433 is coupled to an audio decoding device 461 via an input buffer 460 .

The apparatus shown in FIG. 1 includes first decoding means 441 for decoding the first sub-stream S1. The first decoding means 441 is coupled to the output 431 of the signal decomposition means 430 via the buffer 440 . The device also includes second decoding means 480 for decoding the graphic data encoded according to the first format. The second decoding device 480 may be integrated with other devices, such as the first decoding device 441 and the audio decoding device 461 . In one embodiment, the above-mentioned means are realized by an integrated circuit such as Sti5505. The decoded stream of the video data S11 and the decoded stream of the graphics data S21 are combined by combining means. The second decoding means 480 not only generates decoded graphic data S21, but also generates a mixing control signal Mx for determining how the decoded stream of graphic data is combined with the decoded stream of video data.

Graphics data coded in a first format schematically illustrated in FIG. 2 includes a header SPUH containing information about the size of the graphics data (SPU_SZ) and an address (SP_DCSQT_SA) of a command table (SP_DCSQT). Graphics data also includes data (PXD) that assigns pixel values to each of a group of pixels. Pixel values refer to contrast codes and chrominance codes. The latter is the corresponding entry and contrast value in the chroma look-up table (PGC_SP_PLT). Data PXD may be duration-length encoded. The contrast value defines how the decoded graphics data stream is merged with the decoded video data stream. The command table (SP_DCSQT) includes one or more graphics commands for controlling the display of graphics data. The command SET_CONTR defines which contrast value is assigned to the pixel value. The command SET_COLOR defines which color code is assigned to the pixel value. The first format specified in the DVD-Video standard is for so-called sub-picture units.

Each pixel in a row is encoded with 2 bits. Its meaning is shown in Figure 3. For example, if the value is 00 then the background pixel set chroma command and the background pixel set contrast command apply. The chroma lookup table PGC_SP_PLT does not form part of the sub-picture unit, but is included in a file called VTSI (Video Title Set Information) in each sub-picture stream.

The assigned pixel data can be encoded with continuous length according to 7 compression rules. Figure 4 shows five of these compression rules, which assign codewords to several pixel sequences with the same pixel value p1, p2. These sequences have lengths ranging from Npix = 1-3, 4-15, 16-63 and 64-255 pixels, respectively. Npix=EOL specifies a sequence of pixels with the same pixel value up to the end of the line. where n1,...,n8 represent the number of pixels. N1 is the most significant bit.

The other two compression rules state that

If necessary, add 4 zero bits at the end of each line as padding bits to achieve byte modulation

all.

●The continuous length encoding in one line will not exceed 1440 bits

The instruction table (SP_DCSQT) in the graphics data includes the following instructions.

STA_DSP starts the display of the SPU. It can be overwritten by the OFF (closed) display status of SP.

SET_COLOUR assigns a color code to each pixel value. This directive requires a parameter with 4 fields, namely

● Set the field of the chroma code for the background pixel (bits 0-3)

- Sets the field of the chroma code for the mode pixel (bits 4-7)

• Set the field of chroma code for Enhanced Pixel-1 (bits 8-11)

• Field to set chroma code for Enhanced Pixel-2 (bits 12-15) SET_CONTR sets the blending ratio between each pixel of the main image and the sub image. The contrast is set in a similar way to the case of the SET_COLOUR command above, i.e. if the parameter of SET_CONTR is: O×F 0×1 0×A 0×4

Then, the blending ratio 0x4 is assigned to the pixel data 00, the blending ratio 0xF is assigned to the pixel data 11, and so on. The video allows contrast values ranging from 0 to 15 to be assigned to each of the 4 colors. The SET_CONTR field is used to define this value. SET_DEREA defines a rectangular area for displaying pixel data. If this command is not given for a particular SPU then the previous setting is used.

CHG_COLCON changes the color and contrast of pixel data during display of a video frame. The instruction code of the first byte of its parameter is 0×7. The second and third bytes give the length of the parameter. Following these bytes is Pixel Control Data (PXCD). The latter consists of several lines of control information (LN_CTLI). This structure gives the line number (starting line number, ending line number) in the highlighted area of the rectangle, and also gives the number of the following line control information. The number of LN_CTLI can be up to 8, for example • If there is only one LN_CTLI, this LN_CTLI defines the left-hand side of the rectangle coordinates. The end of the line defines the right hand side. • If there are 2 LN_CTLIs the first one defines the left hand side of the rectangle coordinates. The second LN_CTLI defines the right-hand side of the rectangle coordinates. • Pixel control data including 3 LN_CTLIs corresponds to 2 instead of 1 rectangular area, 2 areas are placed side by side with equal height. ●Wait. Note that the minimum width (ie, the difference between 2 starting pixel numbers) is 8 according to the DVD-Video standard. The pixel control information includes the following data. • Starting pixel number (X coordinate) • Chroma code that can override the value set by SET_COLOUR. ● Contrast can be overridden by the value set by SET_CONTR.

The device according to the invention comprises conversion means 450 for converting graphic data from the second format into the first format. The device also comprises selection means 470 for selecting as input data to the second decoding means 480 one of the converted graphics data or the data from the second stream encoded according to the first format. According to the second format shown in Figure 5, the graphics data includes a header (HEADER) containing information about the size of the graphics data and flag bits (page_flag, highlight_1_flag, highlight_2_flag, display_data_flag) to indicate whether the graphics data further includes chroma lookup table data (CLUT_DATA), while the chroma lookup table data includes

a first chroma lookup table (CLUT_data) and information about the first area (page_area()), and/or

a second chroma look-up table (CLUT_1_data) and information defining a second area (highlight_1_area()), and/or

a third chromaticity lookup table (CLUT_2_data) and information defining a third area (highlight_1_area()), and/or

A set of duration-length coded data (display_data) that assigns a chroma code to each of a set of pixels. Second and third chrominance look-up tables are applied within the second and third regions, respectively. The first chromaticity look-up table is applied to that portion of the first region that does not correspond to the second or third region. According to the second format shown in FIG. 5, it is known from the specification sheet of the Super Video Disc (SVCD) version 1.0 in the form of OGT-page (overlapping graphics and text pages).

In said embodiment, the CPU 421 also forms means for detecting whether the record carrier comprises graphics data conforming to the first or second format. If it is detected that the record carrier is a DVD-Video disc, which means that the detected record carrier 1 comprises graphic data complying with the first format, then the central processing unit 421 gives a signal Su with a first logical value, so that the selection means 470 at The first input 471 selects the signal as its input signal and supplies this signal to the second decoding device 480 . The second decoding means 480 produce at a first output 481 decoded graphics data in the form of a bitmap and at a second output 482 a mixing control signal. If it is detected that the record carrier 1 is an SVCD disc, i.e. the record carrier 1 comprises graphic data complying with the second format, then the central processing unit 421 gives a signal Su with a second logical value, so that the selection means 470 is at the second input 472 selects a signal as its input signal and provides this signal to second decoding means 480 . The signal at the second input is generated by conversion means 450 . The conversion means 450 convert the graphics data stream from the second format into the first format at the output 432' of the signal decomposition means 430.

In the embodiment described here, the first format is the DVD-Video subpicture format and the second format is the SVCD overlay graphics and text format.

Figure 6 schematically shows the operation of the switching device. In the first program segment denoted P1, the first OGT page, the so-called OGT base page, is read into a memory. An OGT base page at least includes display data and corresponding chromaticity lookup table data. Then, in the second program segment P2, the information of the OGT base page is converted into corresponding information in the first format. See Figure 6A for a more detailed description of program segment P2. The next OGT page is read in program segment P3. In program segment P4, it is judged whether this page is an OGT base page or an OGT update page. Contains no display data but only CLUT_DATA, eg information about correcting highlighted areas. If the page is an OGT base page, a submap unit is generated in segment P5 based on previously converted information and the submap unit is sent to the submap decoder in segment P6. The program turns back to the OGT base page read in by the program segment P2 to convert the program segment P3. If the page is an OGT update page, in block P7 it is determined how much time remains before the earliest time stamp in the chrominance lookup table of the generated subpicture unit expires. If time is sufficient for the calculations required to combine the information read in in segment P3 with the transformed information, then build an SPU based on the transformed information in segment P10 and write the SPU to the SPU in segment P11 decoder. Then in P9 (see FIG. 6B for a more detailed description), the information of the updated page is merged with the already converted information. In this case, any chroma look-up table data associated only with pages preceding the current update page can be overwritten. If it is determined in program segment P7 that the time is sufficient to complete the calculation, then in program segment P8 it is determined whether the chroma lookup table PGC-SP-PLT of the calculated submap unit still includes enough space to accommodate the chroma query of the last OGT update page table data. If not, the program returns to block P10 to continue. If there is enough space, return to program segment P9 to continue.

Next, program segment P2 will be described in more detail with reference to FIG. 6A. In the first program segment P2-1, the template shown in FIG. 7 is constructed to start the subgraph unit instruction table SP-DCSQT to be calculated. This template contains some parameters to be determined during the processing of the submap unit. They are the start address <SA> of the next table, which can be determined once the current table is complete. The chromaticity code <CC> and contrast <CT> have to be derived from the chromaticity lookup table data of the OGT base page. The value <DA> is derived from the parameter defining the page area. The address <BF> of the first pixel in the bottom field can be determined after the display_data in the OGT page is encoded with a continuous length. The continuous length encoding is carried out in program segment P2-2. In block P2-3 it is determined whether the value of page_data_length contained in the OGT page header is smaller than a predetermined value. If it is less than, the decoded data is encoded with a continuous length according to the first format. In this embodiment, the second format is the SVCD format for overlapping graphics and text, and the continuous-length coded data includes 7 different codewords. These codewords are converted into duration-length codes for the first format, as shown in Figure 8.

It is not necessary to complete program segment P2-2 before executing program segment P2-4. Program segments P2-2, P2-4 may, for example, be implemented as parallel processes operating on persistent-length encoded data in a pipelined fashion.

In the program segment P2-5, the chromaticity lookup table data of the chromaticity lookup table of the OGT page is loaded into the chromaticity lookup table PGC-SP-PLT of the sub-graph unit generated.

In program segment P2-6 the values <CC> and <CT> are derived from the chromaticity look-up table data.

The number of entries in the table PGC-SP-PLT is set to four in the block P2-7.

The expression method of the chromaticity in the second format, that is, the SVCD overlay graphics and text format, is quite different from the expression method of the chromaticity in the first format, that is, the DVD video sub-picture format.

First, in the second graphics format a graphics stream contains a number of overlapping graphics pages, where each page contains a different chromaticity look-up table including the 4 possible colors and transparency values for that area of the page. Furthermore, each page contains one or two additional chroma lookup tables for defining chroma and transparency values for highlighted regions. The chromaticity lookup tables differ from page to page. Therefore, each OGT page can define up to 12 shades (4 for the page area, 4 for the highlight area 1, and 4 for the highlight area 2). In contrast, under the DVD-Video sub-picture format, only one CLUT can be defined in each program chain of each VTS (eg, a program stream). Further, the length-encoded data in an OGT page represents a chroma code as an index to one of the chroma look-up tables, depending on whether the pixel is in highlight region 1, highlight region 2, or outside of both regions. The duration-length encoded data in the sub-pixel is assigned a pixel value through the chroma code, and this value is the index of the chroma look-up table PGC-SP-PLT. Chroma codes are assigned by the SET_COLOUR and/or CHG_COLCON commands.

The CLUT in the second graphic format includes the mixing ratio in addition to Y, Cb and Cr values. The blending ratio indicates the level of blending of the decoded overlay graphics data (OGT_output) and the decoded video data (video_output). The applicable mixing formula is as follows:

Display output = (mix_ratio/255)*OGT_output+((255-mix_ratio/255)/255)*video_output.

In the first graphic format, the DVD-Video sub-picture format, the mixing ratio can be defined by the command SET_CONTR. In the second format, the Overlay Graphics and Text (OGT) format, contrast values up to 255 are used and the blending ratio is limited to a range of 0 to 16 in the SPU. In the first graphic format, the display output is calculated from the output (sub_picture_output) of the second decoding device 480 and the output (video_output) of the second decoding device as follows

Display output = (k/16)*sub_picture_output+((16－k)/k)*video_output, where

k=contrast (contrast) when contrast=0; and k=contrast+1 when contrast>0.

Preferably the contrast ratio is calculated from the mixing ratio as follows:

Contrast = mix_ratio/16.

As an example, the chroma look-up table information conforming to the second format shown in FIG. 9 is converted into the first data structure. The address in Figure 9 is given in the form of sector number: byte offset: bit offset. The bit with an offset of 0 is the most significant bit.

The chromaticity information (Y_value[], Cb_value[], Cr_value[]) in FIG. 9 is converted into PGC-SP-PLT for graphic data conforming to the first format shown in FIG. 10 . PGC-SP-PLT forms part of Video Title Set Information (VTSI).

With the help of the command CHG_COLCON described below, the mixing ratio in the CLUT of the graphics data in the second format is converted into a contrast ratio.

In program step P2-8 it is judged whether the first highlighted area is included in the OGT page. If yes, then the chromaticity lookup table entries defined in the region chromaticity lookup table are added to the chromaticity lookup table PGC-SP-PLT in program segment P2-9. Thus, in program segment P2-10, parameters are added to the CHG_COLCON command to represent the chromaticity code corresponding to the above items. There are other parameters added to the command in this block representing the contrast value to apply to the first highlighted area.

If it is determined in the program step P2-12 that the second highlighted area is included in the OGT page, then program steps P2-13 to P2-15 are performed. These program steps correspond to program steps P2-9 to P2-11.

After converting from the second format to the first format, the 10-byte parameter added to the CHG_COLCON command represents the highlighted area. This parameter includes

4 bytes for line control information (LN_CTLI) ie

●The start line number of the highlighted area in the subgraph

●Number of changes

The ending line number of the highlighted area within the subplot

And 6 bytes of pixel control information (PX_CTLI) namely

● The starting pixel number of those lines within the range defined by the start and end line numbers

●New color code

●New contrast code

The state at the end of the highlighted area is defined by another 6 bytes of pixel control information. The above additional information is not necessary if the highlighted area extends to the end of the line. The limitation is that only one CHG_COLCON command can be given for a given time frame, ie, the time period between two time stamps of the command table. Also, within a CHG_COLCON instruction, there can only be a maximum of 8 changes.

A single highlighted area means such a CHG_COLCON command whose line control information gives the coordinates (line number) of the area and 2 pixel control information, one for the area start position and the other for the area end position. However, one pixel control information is sufficient when a single highlighted region extends to the exact subimage boundary.

Two highlighted regions result in a CHG_COLCON command with 2 row control messages. Each row control information has 2 pixel control information (same as above). The only restriction is that the minimum width of the highlighted area is 8 pixels.

The karaoke mode of the device of the present invention can be realized by multiple CHG_COLCON commands, each command is used for a different video frame, as described above.

An OGT page has, for example, the highlighted area defined in FIG. 11 . In an embodiment of the device according to the invention the conversion means converts the information shown in FIG. 12 .

Fig. 6B shows program segment P9 in Fig. 6 in more detail. In program segment P9, at first program segment P9-1 judges whether the chromaticity (Y, Cb, Cr) in the CLUT item of current OGT page appears in the PGC-SP-PLT of the constructed sub-pixel unit. If so, a reference to that item is added as a parameter to a CHG_COLCON command in program segment P9-3. If not, a new reference is given to that item in program segment P9-3. The chroma is then copied into the PGC-SP-PLT project with that reference in program segment P9-4. The entry number for PGC-SP-PLT is then incremented by 1 in block P9-5. Execute block P9-2.

Figure 13 shows an embodiment of the conversion means in more detail. The conversion device 450 shown includes a microprocessor 451, a storage device 452 for storing the graphic data in the second format, a storage device 454 for storing the look-up table, and a comparison device 453 for comparing the data contained in the second format The new look-up table in the encoded graphics data is compared to the stored look-up table. It has been noted previously that replacing the program chain's subpicture palette PGC-SP-PLT can cause disturbing flickering of the resulting image. The inventors have found that this phenomenon can be greatly attenuated in embodiments of the device according to the invention. The comparison means 453 cause the data in the stored look-up table to be replaced and the data of the new look-up table to be transmitted to the second decoding means 480 when this data is not in the new look-up table. In this way only the PGC-SP-PLT needs to be replaced if the content of the PGC-SP-PLT has to be changed.

It should be noted that the scope of protection of the present invention is not limited to the embodiments described here. For example, while one embodiment of the apparatus according to the invention is described as comprising detection means for detecting which type of record carrier is presented, another embodiment comprises input means for making this information available to the user. In addition to having reading means, the above-mentioned apparatus may also comprise recording means for reading the information stream on the record carrier. Nor is the scope of protection limited to the reference numerals contained in the claims. The word "comprising" does not exclude other elements than those mentioned in the claims. The word "a" or "an" of an element does not exclude a plurality of that element. The invention in turn resides in each new feature or combination of features.

Claims (4)

1. be used for the replay device that record carrier (1) is reset, this device comprises

-from record carrier (1), read the read-out device (410) of information flow (S0),

-from information flow (S0), isolate at least the first and second sub-information flows (S1, signal decomposition apparatus S2) (430) comprise coding video frequency data in the above-mentioned first sub-information flow (S1) and comprise the coded graphics data in the second sub-information flow (S2),

-first decoding device (411) that the first sub-information flow (S1) is decoded,

-reception second sub-the information flow, (S2) and second decoding device to decoding according to the graph data of first kind of form coding, (480), according to above-mentioned first kind of form, graph data comprises the header and the command list address that contain relevant for the graph data size information, graph data comprises that also to one group of pixel each all gives the data run length coding of pixel value, this pixel value is corresponding to a colourity sign indicating number, and this sign indicating number is corresponding to one in the colourity question blank, command list comprises that one or more graphics commands are used for the demonstration of control chart graphic data

-with encoded video streams (S11) and the merging device (457) that merges mutually of decoding graph data (S21),

The characteristics of above-mentioned replay device also are to comprise

-conversion equipment (450), be used to receive the graph data second sub-information flow according to second kind of form coding (S2 ') and be first kind of form from second kind of format conversion, comprise one according to second kind of format graphics data and contain and indicate graph data relevant for the header of graph data size information and marker bit and whether further comprise said graph data

The information of the first colourity question blank and definition first area, and/or

The information of the second colourity question blank and definition second area, and/or

The information in the 3rd colourity question blank and definition the 3rd zone, and/or

Each of giving one group of pixel is given one group of run length coding data of a colourity sign indicating number, and wherein the colourity sign indicating number is corresponding to one in the colourity question blank,

The second colourity question blank is applied to second area, and the 3rd colourity question blank is applied to the 3rd zone, and the first colourity question blank is applied in the first area nonoverlapping that part of with the second or the 3rd zone,

-choice device (470) is used for selecting the input data as second decoding device from the graph data that is converted or according to these two information flows of first kind of form coded data.

2. replay device according to claim 1, its characteristics are that conversion equipment (450) comprises the storage device (454) that is used to store the colourity question blank, with the comparison means (453) that is used for comparing by new question blank in the middle of the graph data of second kind of form coding and storing queries table to being included in, this comparison means makes the data in the storing queries table be replaced and when these data were not in new question blank, the data of new question blank were sent to second decoding device.

3. replay device according to claim 1 and 2, its characteristics are that its checkout gear (421) is used for detection record carrier (1) and whether comprises by first kind of form or second kind of pictorial data that form is encoded.

4. the method that is used for playback of recorded carrier (1), in this way

-from record carrier (1), read information flow (S0),

-information flow (S0) be separated at least the first and second sub-information flows (S1 S2), comprises coding video frequency data in the above-mentioned first sub-information flow (S1) and comprises the coded graphics data in the second sub-information flow (S2),

-the first sub-information flow (S1) is decoded,

-reception comprises the second sub-information flow (S2) by the graph data of first kind of form coding in first kind of receiving mode; According to first kind of form; Graph data comprises the header and the instruction catalogue address that contain relevant for the graph data size information; Graph data also comprises the run length coding data of each pixel of one group of pixel being given pixel value; It is respective items in the colourity question blank that pixel value refers to the colourity code; Instruction catalogue comprises that one or more graphics commands are used for the demonstration of control chart graphic data

The decoded stream of the decoded stream of-video data (S11) and graph data (S21) merges,

Its characteristics are

Said method comprises second kind of receiving mode, receive the second sub-information flow (S2) therein, comprise one according to first kind of format graphics data and contain and indicate graph data relevant for the header of graph data size information and marker bit and whether further comprise by the graph data of second kind of form coding

The information of the first colourity question blank and definition first area, and/or

The information of the second colourity question blank and definition second area, and/or

The information in the 3rd colourity question blank and definition the 3rd zone, and/or

Each of giving one group of pixel is given one group of run length coding data of a colourity sign indicating number, and wherein the colourity sign indicating number is corresponding to one in the colourity question blank,

The second colourity question blank is applied to second area, and the 3rd colourity question blank is applied to the 3rd zone, and the first colourity question blank is applied in the first area and inconsistent that part of in the second or the 3rd zone,

Graph data by second kind of form coding in second kind of receiving mode is converted into the graph data of encoding by first kind of form

According to this method, the graph data of conversion or from the selected decoding of the data according to first form of second information flow.

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