CN1728804A - Method for using memory in time of decoding sub image frame of DVD - Google Patents

Method for using memory in time of decoding sub image frame of DVD Download PDF

Info

Publication number
CN1728804A
CN1728804A CN 200410053150 CN200410053150A CN1728804A CN 1728804 A CN1728804 A CN 1728804A CN 200410053150 CN200410053150 CN 200410053150 CN 200410053150 A CN200410053150 A CN 200410053150A CN 1728804 A CN1728804 A CN 1728804A
Authority
CN
China
Prior art keywords
coordinate
pixel
stage
sprite
memory
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN 200410053150
Other languages
Chinese (zh)
Other versions
CN100420295C (en
Inventor
李承埈
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai LG Electronics Co Ltd
Original Assignee
Shanghai LG Electronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai LG Electronics Co Ltd filed Critical Shanghai LG Electronics Co Ltd
Priority to CNB2004100531505A priority Critical patent/CN100420295C/en
Publication of CN1728804A publication Critical patent/CN1728804A/en
Application granted granted Critical
Publication of CN100420295C publication Critical patent/CN100420295C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Television Signal Processing For Recording (AREA)

Abstract

In time of decoding sub image frame, only under condition that there is at least more than one pixel with contrast value of pixel other than zero in pixels of X coordinate and with Y coordinate equal to n, color value and contrast value of all pixels in X coordinate related to Y coordinate are stored in memory. Then, values of Y coordinate, where contrast value is not equal to zero, in original sub image frame are stored so as to accomplish decoding for sub image frame. Using stored values of Y coordinate in original sub image frame update value of SET_DAREA. Not storing color values and contrast values of decoded sub image frame in background pixel area, which users are unable to watch, into OSD memory reaches to effects of reducing use of OSD memory space, and raising efficiency of hardware.

Description

Memory using method during the decoding of DVD sprite
Technical field
The invention relates to the DVD video with the sprite decoding device, in more detail, when being exactly the sprite decoding, utilize bitmap (bitmap) characteristic of pixel data, use the invention of memory approach efficiently.
Background technology
DVD (Digital Video Disc) is as the light quantum optical disc apparatus, be have individual layer (such as, DVD5) 4.7GB, double-deck (such as, the DVD9) multimedia storage apparatus of the sound of the image of the big capacity of 8.5GB, high image quality and high tone quality.
Such DVD plays with DVD-ROM driver etc. by DVD player or PC, by hardware and software decoding device and display processing unit, and reconstructed images, voice signal is viewed and admired the user.
Up-to-date DVD player also has CD-R except the captions with common DVD, CD-RW, and the playing function of CDDA, some DVD player also have support DVD-Audio, SACD, VCD, SVCD, DVD-R, DVD ± RW, HDCD, the function of MP3.
Such DVD player is except possessing daily playing function, also support the audio stream adjustment, camera angle is adjusted, sub-picture streams adjustment etc., F.F. (fast forward), rewind down (fastreverse), (slow reverse) moved back in slow-motion (slow forward) slowly, opens and suspends (pauseon), close time-out (pause off), the trick-play functions of closing still frame (still off) and choosing arbitrarily.Also have and to climb over next chapter and the skip functions of turning over to last chapter.Simultaneously, also have various buttons and relevant user's operation (user operation) function, in user's operating function, also comprise and to select title (title), root (root), sprite (sub_picture), audio frequency, the menu function (menucall) of angle menus such as (angle).And, also have be not suitable for the controls playing function of the scene that child views and admires such as father and mother's management information (parental management information) etc.
Also have, the DVD video data stream is by big video, audio frequency, and sprite constitutes.The image of DVD video (video) compress mode is divided into MPEG-2 and MPEG-1, and image format is supported in the image format that exchanges between NTSC (National Television System Committee) and PAL (PhaseAlternating Line) mode.Under the NTSC mode, the size of image and aspect ratio are horizontal/perpendicular 720,480 pixels, 29.97Hz aspect ratio.Under the PAL mode, can have the aspect ratio of the 25Hz of 720,576 forms.And audio frequency can be stored maximum 8 audio streams, supports LinearPCM, DolbyAC-3, and mpeg audio by option, is supported DTS (Digital Theater System) even.
Sprite can have maximum 32 data flow.Sprite comprises captions (subtitle), menu, captions, Karaoke, contents such as simple cartoon.Normal use is sprite and menu in general DVD title.
Fig. 1 is made of following several parts: leading section 110 as the skeleton diagram of the general structure that shows such DVD player; DVD data processing division 120; System decoder 130; Buffer storage 140; Sprite decoder 150; OSD memory 160; OSD handling part 170; A/V decoder 180; Frequency mixer 190 and navigation manager 200.
In showing Fig. 1 that DVD constitutes, leading section 111 is as the optical instrument of common DVD machine, and control light picker 112 is physically near the CD 111 that has write down data.Promptly, light picker 112 is under the control of SERVO CONTROL portion 115, object lens (there not being mark on the figure) are placed into the light beam of light harvesting on the signal magnetic track of CD 111, reflex to signal recording surface, and then by behind the object lens light harvesting, convert the signal of telecommunication to, to RF module 113 and 115 outputs of SERVO CONTROL portion.RF module 113 has generated the RF signal of the electrical signal data of regeneration input, to preamplifier 114 outputs.Preamplifier 114 is signal digitalized with RF, increases after the amplitude, to 120 outputs of DVD data processing division.
SERVO CONTROL portion 115 becomes the focusing rub-out signal with the electrical signal conversion of input, after detecting the trail-and-error signal, light picker 112 is in order correctly to read the data of CD 111 records, and the rub-out signal of will focusing generates the focusing drive signal, the focusing transmission device in the control light picker 112; The trail-and-error signal is generated the tracking drive signal, the tracking drive device in the control light picker 112.
The DVD data of the digitized RF state that DVD data processing division 120 will physically read at leading section 111 are carried out 8/16 detection (demodulation), after error correcting (ECC) and decoding (descramble) wait, export to system decoder 130.
At this moment, CD has write down expression data (Presentation Data) and navigation data for 111 li.Expression data comprises that broadcast is to the audio frequency of picture and the sub-image data of video data and subtitle image etc.Here, expression data wraps (Pack) unit record by the PS with 2048 byte records sizes and reads, and the PS bag is made of the packet head of 14 bytes and the packet of 2034 bytes.Packet is made of the packet of record data packet head and A/V/ sprite/navigation data once more.
That is, shown in the structure of the DVD video packets of Fig. 2, packet head is by the packet start code of 4 bytes and the SCR of 6 bytes (System Clock Reference), the program mux_late of 3 bytes, and the stuffing_length of 1 byte forms.
Such as, the formation of sprite bag, as shown in Figure 2, by the packet head of 14 bytes with represent the sub-image data bag of 2034 bytes of PES to form.
From Fig. 3, we can see the structure of sub-image data bag in the detailed sprite bag.Here, sub-image data bag (SP_PKT) is by the packet header of * I byte and the dialogue traffic identifier of 1 byte, and more than 1 byte, the following sub-image data of 2024 bytes constitutes.Herein, sub-image data partly demonstrates ES.And the * I of Fig. 3 can have the value from 9 bytes to 24 bytes by the size of video data packet head.The size of packet header as shown in Figure 4, according to P-STD_buffer_scale and P-STD_buffer_size, PTS (Presentationtime-stamp), Stuffing has variable value.
At this moment, if the length of sprite bag is 2048 bytes, the length of bag is less than 2048 bytes, by in packet header, inserting filling byte (stuffing byte) or filler data bag (padding packet) being pasted the tail end of packet, make the length of bag remain 2048 bytes always.
And sub-picture unit (SPU) is made of the sprite bag of a plurality of 2048 bytes.That is, a plurality of packages that are made of 2048 bytes are closed, constituted a sub-picture unit (SPU) of forming chapter captions.At this moment, a bag can constitute a sub-picture unit, and plural bag also can constitute a sub-picture unit together.
As shown in Figure 4, sub-picture unit is by the sub-picture unit header (SPUH) and the pixel data (PXD) of 4 bytes, and sprite shows that control sequence table (SP_DCSQT) constitutes.Here, pixel data and sprite show that control sequence table (SP_DCSQT) can have maximum 26610 bytes separately.
The structure that the sub-picture unit header (SPUH) that following table 1 has shown 4 bytes is made of 2 bytes of 2 bytes of expression sub-picture unit size and display sequence list start address.
[table 1]
Content Byte number
SPU_SZ The sub-picture unit size 2 bytes
SP_DCSQT_SA Display sequence list start address 2 bytes
Amount to 4 bytes
At this moment, actual sub-picture unit as shown in Figure 5, be by in the sub-image data bag except packet header, the pure sub-image data ES of dialogue traffic identifier (sub_stream_id) constitutes.
And sprite shows that control sequence table (SP_DCSQT) is made of n+1 sprite display control sequence, and sprite display control sequence separately is 2 bytes by the expression sprite display control sequence time started; 2 bytes of representing next sprite display control sequence start address; N shows that the control command language constitutes.
And each shows that the control command language is as shown in table 2 below, has 9 kinds of inscapes.
[table 2]
Command name Content Coding The extension field number
FSTA_DSP Set pixel data forcibly and show the time started 00H 0 byte
STA_DSP Set pixel data and show the time started 01H 0 byte
STP_DSP Set pixel data and show dwell time 02H 0 byte
SET_COLOR Set the pixel data colour coding 03H 2 bytes
SET_CONTR Set the contrast between pixel data and the key frame 04H 2 bytes
SET_DAREA Set the pixel data viewing area 05H 6 bytes
SET_DSPXA Set pixel data and show start address 06H 4 bytes
CHG_COLCON Set the variation of pixel data color and contrast 07H PCD size+2 bytes
CMD_END Show that control command finishes FFH 0 byte
That is, in the superincumbent table 2, FSTA_DSP of 1 byte (Forcedly set displaystartt iming of pixel data) and opening that sprite shows. closed condition is irrelevant, begins to carry out the demonstration of pixel data forcibly.The STA_DSP of 1 byte (Sets display starttimingof pixel data) is the order language that the beginning sprite shows, the STP_DSP of 1 byte (Sets displays top timing of pixel data) stops the order language that sprite shows.The SET_COLOR of 3 bytes (Sets color code of pixel data) gives the pixel colour coding, and the SET_CONTR of 3 bytes (Sets contrast between pixeldata and main picture) is an order language of adjusting the contrast between pixel data and the key frame.The SET_DAREA of 7 bytes (Sets display area of pixel data) is an order language of setting the pixel data viewing area, and the SET_DSPXA of 5 bytes (Sets display startaddress of pixel data) shows the order language that first pixel data address is set that uses.When top CHG_COLCON (Sets change of color and contrast forpixel data) is the video pictures variation, change the look of pixel and the order language of contrast, CMD_END (End of Display Control Command) shows to show that the control command language finishes.
On the other hand, system decoder 130 is separated into and expresses flow data and navigation flow data in multipleization of DVD data field of DVD data processing division 120 with output.After top expression flow data is separated into audio/video/sub-picture streams data respectively once more, with the A/V flow data that separates to 180 outputs of A/V decoder, the sub-picture streams data by buffer storage 140 to 150 outputs of sprite decoder.At this moment, the flow data that will navigate is input in the navigation manager 200, navigation manager 200 and SERVO CONTROL portion 115 interlocks, whole flow processs that control DVD plays.The A/V flow data of 180 pairs of inputs of A/V decoder uses relevant decoding algorithm, finish symbolism respectively after, to frequency mixer 190 outputs.Here, buffer storage 140 can be the field that the sub-image data on the SDRAM distributes, and also can be the buffer storage of temporarily storing sub-image data.
If top sprite decoder 150 is software sprite decoders, when sprite decoder 150 produces interrupt signal at system decoder 130, after buffer storage 140 reads sub-image data and decodes, store in OSD (the On Screen Display) memory 160.The sub-image data that 170 pairs of OSD handling parts are stored in the OSD memory 160 carries out the OSD processing, to frequency mixer 190 outputs.Frequency mixer 190 will be in A/V decoder 180 after the vision signal and OSD handles in OSD handling part 170 sprite signal combination of video decode, in order to show output.Here, demonstration is the demonstration of NTSC or PAL mode.The output of frequency mixer 190 is by NTSC/PAL encoder (not indicating on the figure), finishes coding.
At this moment, the pixel data type of sprite is by encoded bitmap service cycle (Runlengthcodedbitmap), and each pixel all has 2 value.Pixel data is by background (background) pixel, and pattern (pattern) pixel is focused on (emphasis) pixel-1, and (emphasis) pixel-2 constitutes emphatically, is divided into 00,01,10,11 2 matrix data values separately.
By background pixel, pattern pixel, pixel-1 is focused on pixel-2 emphatically, can access the colored pixels degree of depth (color pixel depth) of 4bpp (bits perpixel).On behalf of each pixel, this be assigned as 4 color value, can obtain a kind of tone value separately from the palette of 16 kinds of colors.And each pixel has the contrast of 16 grades.Here said contrast refers to common transparency, if be 0, represents transparent (full transparency), if 15, represent opaque (full opacity).That is, pixel data separately can be tried to achieve 1 reduced value from having from transparent to 16 contrasts (contrast) value of opaque general transparency (transparency) value.And each flows maximum 3.36Mbps the transfer rate of sprite, and sub-picture unit is 53220byte to the maximum.
Fig. 6 has shown the example that uses 150 pairs of DVD videos of sprite decoder to use the actual decoding of sprite to Fig. 9.
In Fig. 6,720 * 480th, the viewing area of NTSC (TV system with 525/60) video, background pixel zone (Background Pixel Area) is as having the part that pixel data value is 00 data bitmap, in this case, in the video field of (0～719) * (0～479), comprise (0～719) * field of (2～474).In fact, sprite has maximum 720 * 478 size.This is that the Y coordinate can be from 2 to 479 numerical value because the X coordinate of sprite can be from 0 to 719 numerical value.
Top pixel data value can be by decoding by sub-picture unit header (SPUH), pixel data (Pixel Data; PXD), and sprite show that PXD (Pixel Data) part of the sub-picture unit that control sequence table constitutes obtains.
Fig. 7 is the accompanying drawing that the characteristic captions with Fig. 6 partly enlarge, and from figure, we can see by pixel data numerical value is that 01 pattern pixel and pixel data numerical value are the captions that 11 pixel-2 emphatically constitutes.
In this case, the outline portion of captions is pattern pixel, and in fact, captions partly are to constitute by focusing on pixel-2, according to the difference of coding method, can the outline portion of captions be encoded according to pixel-1 or pixel-2 emphatically emphatically.And the captions part also can or be focused on pixel-1 and encode according to pattern pixel.
And background pixel zone (Background Pixel Area) must use background pixel data (Background Pixel data) just can encode.Therefore, other pixel data also can be used in the background pixel zone, encodes.But almost the background pixel data field of most sprite all is to utilize the background pixel data to encode, and contrast number is 0 (transparent).
Fig. 8 and Fig. 9 have shown the accompanying drawing of another actual decoding DVD video with sprite.
Fig. 8 is the same with Fig. 6, and as the sprite of the DVD video of supporting ntsc video, in this case, sprite has occupied the field, (237～484) * (396～425) in 720 * 480 video fields.
Fig. 9 is the accompanying drawing of a part of the captions of expanded view 8.Therefrom, we can know sprite which pixel data is made of.
Fig. 9 is the same with Fig. 7, and the outline portion of literal is that 01 pattern pixel constitutes by pixel data value, and the word segment that is made of pixel-2 emphatically in Fig. 7 in Fig. 9, constitutes by pixel-1 emphatically.
Therefore, when sprite was carried out actual coding, color of pixel numerical value and reduced value were very important for type of pixel.
So, see Fig. 6 and Fig. 8, can therefrom find important discrepancy.Background pixel occupies the major part of 720 * 480 video fields among Fig. 6, and among Fig. 8, background pixel occupies seldom part.Under the situation of Fig. 8, form coding by high data compression rate.
When encoding as the method for Fig. 8, not only can reduce data volume, during decoding, can reduce to take the size of memory storage space.
, for the DVD title of existing region code 3, about about 50% by encoding as Fig. 8 mode, and remaining is about 50% by encoding as Fig. 6 mode.
Here, so-called region code is divided into the whole world 6 zones exactly, and in specific hardware, the DVD that only drives specific DVD headline making saves system from damage.That is, region code is according to the difference in zone, the demand and the sales volume of the DVD title of circulation managed, and be in order to protect the film industry, just stop bootlegging, illegal circulation etc. to be used.
In other words, the DVD region code is exactly in DVD player and DVD title, and the boundary in artificial zone is set, and in specific DVD player, drives the system of specific DVD title.Korea S, Taiwan, the region code in Southeast Asia is 3.Therefore, DVD player or the DVD floppy disk of buying at home is set at 3 with region code.So, can not play title from foreign country or the DVD that directly buys by the Internet.
As mentioned above, common sprite decoder 150 is irrelevant with type of pixel or reduced value, and its color value that all are relevant with the pixel data of sprite comes out all data after storing in the OSD usefulness memory 160 in screen displayed.But the user can not see that reduced value is 0 background pixel zone.
Therefore, as shown in Figure 6, after the sub-image data of whole codings that will comprise the pixel data in whole background pixels zone is decoded in sprite decoder 150, when storing in the OSD memory 160, the problem of OSD memory 160 memory spaces appears taking in a large number.
Summary of the invention
In order to solve top problem, the objective of the invention is to utilize the characteristic of the sprite that constitutes by bitmap, when providing a kind of DVD sprite to decode, can reduce the memory using method that takies the OSD memory storage space.
For achieving the above object, when sprite of the present invention was decoded, the memory using method of DVD comprised following several stages:
(a) in sprite when decoding,, in the pixel of the X coordinate when the Y coordinate is n, having an above pixel comparison value at least is not 0 pixel, the stage that all color of pixel values of X coordinate that will be relevant with the Y coordinate and reduced value store memory into;
(b) the storage reduced value is not the stage of the Y coordinate figure of 0 initial sprite; With
(c) finish the decoding of sprite, the Y coordinate figure of the initial sprite by storage is updated in the stage that shows the SET_DAREA value of sprite position in all videos field.
Superincumbent (a) stage comprises following several stages:
(a-1) parameter n is decided to be 2 initial phase;
All color of pixel values of X coordinate when (a-2) the Y coordinate being n store the stage of memory into;
(a-3) judge in all pixels of the X coordinate when the Y coordinate is n, whether exist reduced value be not 0 stage of pixel;
(a-4) in superincumbent (a-3), if judge in all pixels of the X coordinate when the Y coordinate is n, having a reduced value is not 0 pixel, in memory, and the stage of the reduced value of all pixels of the X coordinate when storing the Y coordinate and being n;
(a-5) in the above (a-3) in the stage if judge that the reduced value of all pixels of the X coordinate when the Y coordinate is n is 0, is that Y coordinate that the color of pixel value of n+1 writes on memory stores is the stage on the pixel color value of n with the Y coordinate;
Judge in all pixels of the X coordinate when the Y coordinate is n+1 (a-6) whether having a reduced value is the stage of 0 pixel;
(a-7) superincumbent (a-5) is in the stage, if judge that the reduced value of the pixel of the X coordinate when the Y coordinate is n+1 all is 0, n adds 1 (n=n+1), with the Y coordinate is after the color of pixel value of n+1 writes on the color of pixel value that the Y coordinate of storing in the memory is n, turns back to the stage in top (a-6) stage; With
(a-6) above moving repeatedly is (a-7) after the stage, if judge in whole pixels of the X coordinate when the Y coordinate is n+1, having a reduced value is 0 pixel, n is added 1 (n=n+1), in the above in the memory, the stage of all pixel comparison values of the X coordinate when storage Y coordinate is n.
Another object of the present invention by the reference accompanying drawing, is described in detail, and can grasp and understand.
In sum, during the decoding of the sprite of DVD of the present invention, memory using method, the color of pixel and the reduced value of the sprite decoding by the background pixel zone that the storage user not can't see in the OSD memory, reduce taking the OSD memory storage space, improve the efficient of hardware.
Description of drawings
Fig. 1 is the formation block diagram of the summary of common DVD player
Fig. 2 is the schematic diagram of common DVD video packets structure;
Fig. 3 is the schematic diagram of common sprite pack arrangement;
Fig. 4 is the structural representation of common sub-picture unit (SPU);
Fig. 5 is the schematic diagram of the actual formation of common sub-picture unit;
Fig. 6 is by using the sprite decoder, the schematic diagram of the example that the DVD video is decoded with sprite;
Fig. 7 is the schematic diagram that the feature captions with Fig. 6 partly enlarge;
Fig. 8 is by using the sprite decoder, the schematic diagram of another example that the DVD video is decoded with sprite;
Fig. 9 is the schematic diagram that the feature captions with Fig. 8 partly enlarge;
When Figure 10 is DVD sprite of the present invention decoding, the flow chart of memory using method;
Figure 11 is by using the sprite decoder, to the DVD video with the schematic diagram of sprite according to an actual example of decoding.
* the accompanying drawing main mark illustrates *
110: leading section 111: CD
112: light picker 113:RF module
114: preamplifier 115: SERVO CONTROL portion
120:DVD data processing division 130: system decoder
140: buffer storage 150: the sprite decoder
160:OSD memory 170:OSD handling part
180:A/V decoder 190: frequency mixer
200: navigation manager
Embodiment
Below, structure and the effect to example of the present invention is illustrated with reference to the accompanying drawings, can be illustrated by more than one example at least according to the structure of the present invention of description of drawings and effect.Therefore, detailed technological thought of the present invention and core constitute and effect is not limited to this.
The present invention is the same with Fig. 6, and during sprite decoding that the pixel data of whole background field is encoded, the storage that only will have the field that storage is worth makes the use of OSD memory reach minimized in the OSD memory.That is, the present invention is the sub-image data by the field that the storage user not can't see in memory, and it is minimized to realize that the OSD memory storage space is used.
When Figure 10 is the sprite decoding of DVD of the present invention, the action flow chart of run memory using method, former state is used examples of implementation of the hardware of Fig. 1.
That is, sprite decoder 150 is with the sub-image data decoding (stage 201) of input.At this moment, because the X coordinate of sprite can be from 0 to 719 numerical value, the Y coordinate can be from 2 to 479 numerical value, and decoding is 2 o'clock according to the Y coordinate, and 0 to 719 X coordinate, Y coordinate are 3 o'clock, and 0 to 719 X coordinate carries out successively.According to such method, can be decoded to the Y coordinate is 479 always.
For this reason, at first to carry out parameter (n) is decided to be 2 initialization (stage 202) stage.This is that the Y coordinate can be from 2 to 479 value because the X coordinate of sprite can be from 0 to 719 value.Therefore, in fact, the sprite maximum can be 720 * 478.
After finishing the top stage 202, all color of pixel values of the X coordinate when the Y coordinate is n store in the OSD memory 160 (stage 203).In the stage 202,, be that all color of pixel values of 2 o'clock X coordinate are stored in OSD memory 160 with the Y coordinate because n is initialized as 2.
Here, each pixel can partly obtain by the PXD of decoding sub-picture unit, and each color of pixel value and reduced value can show that the SET_COLOR and the SET_CONTR of control command language obtain by the sprite of decoding table 2.And the value of (0～719) * (2～474) can show that the SET_DAREA of control command language partly obtains by the decoding sprite.That is, the coordinate figure of the StartX of SET_DAREA is 0, and the EndX coordinate figure is 719.And the coordinate figure of StartY is 2, and the EndY coordinate figure is 474.
Therefore, finish the top stage 203 after, confirm the reduced value of all pixels of the X coordinate when the Y coordinate is n, judging whether to exist a reduced value is not 0 pixel (stage 204).In the superincumbent stage 204,, carry out the stage 205 if the reduced value of the X coordinate pixel that judged result is the Y coordinate when being n all is 0; If judging reduced value of existence is not 0 pixel, carry out the stage 209.That is, in the pixel of all the X coordinates in a Y coordinate, not 0 pixel if a reduced value is arranged, carry out the stage 209.
Above stage 205 be that to write the Y coordinate that (overwrite) store in OSD memory 160 be on the pixel color value of n for the color of pixel value of n+1 with the Y coordinate.Such as, in the superincumbent stage 203, if supposing the Y coordinate is that 2 o'clock X coordinate color of pixel value is stored in the OSD memory 160, in the stage 205, be that to write on the Y coordinate that is stored in OSD memory 160 be on 2 o'clock the X coordinate color of pixel value for 3 o'clock X coordinate color of pixel value with the Y coordinate.
Then, judge in the pixel of the X coordinate when the Y coordinate is n+1 whether having a reduced value is not 0 pixel (stage 206).In the stage 206, if judge that the reduced value of the pixel of the X coordinate when the Y coordinate is n+1 all is 0, n added for 1 back (n=n+1) (stage 207), carried out the stage 205.Such as if in the stage 205,206, n=2 in the stage 207, behind the n=3, carries out the stage 205.
Stage 205 is that to write (overwrite) Y coordinate in being stored in OSD memory 160 be above the color of pixel value of n for the color of pixel value of n+1 with the Y coordinate.At this moment, n adds 1, equals 3, and the stage 205 is to be that to write on the Y coordinate that is stored in the OSD memory 160 be above 3 o'clock the X coordinate color of pixel value for 4 o'clock X coordinate color of pixel value with the Y coordinate.
From the stage 205 to the stage 207 be according to Figure 10 for example, move repeatedly up to n=380.As example of the invention process,, suppose that reduced value is not that the Y coordinate figure of 0 initial sprite is 381 as Figure 11.
Therefore, the process above the operation during n=380, in the stage 206, is judged in the pixel of the X coordinate when the Y coordinate is n+1 repeatedly, and reduced value is not that 0 pixel has one at least.So, carry out the stage 208, n adds 1 back (n=n+1), and promptly n=381 carries out the stage 209.At this moment, the Y coordinate of memory phase 205 is 381 X coordinate color of pixel value in OSD memory 160.
The storage reduced value is not the Y coordinate figure of 0 initial sprite in the stage 209, carries out the stage 210.That is, be example with Figure 11, storage Y coordinate figure 381.
The reduced value of all pixels of the X coordinate the when stage 210 is n with the Y coordinate stores in the OSD memory 160.That is be that all the color of pixel values and the reduced value of 381 X coordinate stores in the OSD memory 160 with n.
Then, judge whether n=m (stage 211).Here, m can be presented at the last Y coordinate of the sprite on the display, the last Y coordinate of the sprite of also can the person of being to use setting arbitrarily.
In the stage 211, if differentiate the last Y coordinate that present Y coordinate is not a sprite, n adds 1 back (stage 212), in OSD memory 160, and all color of pixel values of X coordinate and reduced value (stage 213) when storage Y coordinate is n.Then, turn back to the stage 211 again, judge whether present Y coordinate is exactly the last Y coordinate of sprite.
On the other hand, in the stage 211, be the last Y coordinate of sprite if differentiate present Y coordinate, utilize the Y coordinate of storage, upgrade the SET_DAREA value (stage 214) of existing decoding.Figure 11 is according to Figure 10 method of the present invention, the example that the sprite of Fig. 6 coding is decoded.
In Figure 11, from 720 * 480, can see the viewing area of NTSC (TV system with 525/60) video, in OSD memory 160, store Y coordinate X coordinate color of pixel value and the reduced value of from 381 to 474 (with 479).
That is,, in memory 160, store all numerical value with the pixel that (0～719) * (2～474) are relevant if use the existing method of Fig. 6; If use the method as Figure 10, only the pixel data with (0～719) * (381～474) stores in the OSD memory 160.
At this moment, in the decode value of SET_DAREA, the StartY coordinate is updated in the stage 209 381 of storage.In fact, as shown in figure 11, on 381 positions of Y coordinate, show spolen title.If want to change the beginning of the X coordinate of sprite, the rearmost position, any one in the rearmost position of Y coordinate, the StartX of the SET_DAREA above upgrading, EndX, the numerical value of being correlated with in the EndY value just can change.That is, when utilizing OSD to show spolen title, because the SET_DAREA decision shows the position of sprite in all videos field, so, must upgrade this part.
On the other hand, the present invention is 0 color of pixel and reduced value by do not store the contrast that is in the spolen title upper part in the OSD memory, and a kind of method that can use the OSD memory effectively is provided.In fact, if the left side of spolen title, the right side, the method that downside can both use the front to set forth just can reach and reduce the effect that takies memory space in the OSD memory more.
By above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.
Therefore, the technical scope of this invention can not be confined to the detailed description on the detailed book; Must determine its technical scope according to the scope of patent application.

Claims (4)

  1. Memory using method when 1, the DVD sprite is decoded, transmit the DVD video data that promptly in DVD, writes down and the decoding sub-image data after, memory using method during with the sprite decoding of the sprite color of pixel value of decoding and the reduced value dvd system that stores memory into, it is characterized in that it comprises following several stages:
    When (a) sprite was decoded, in the pixel of the X coordinate when the Y coordinate is n, the reduced value that has an above pixel at least was not 0 pixel, the stage that all color of pixel values of X coordinate that will be relevant with the Y coordinate and reduced value store memory into;
    (b) the storage reduced value is not the stage of the Y coordinate figure of 0 initial sprite; With
    (c) finish the decoding of sprite, the Y coordinate figure of the initial sprite by storage, in all videos field, decision shows the stage that the value of the SET_DAREA of sprite position is upgraded.
  2. Memory using method when 2, DVD sprite as claimed in claim 1 is decoded is characterized in that wherein (a) stage comprises following several stages:
    (a-1) parameter n is decided to be 2 initial phase;
    All color of pixel values of X coordinate when (a-2) the Y coordinate being n store the stage of memory into;
    (a-3) judge in all pixels of the X coordinate when the Y coordinate is n, whether exist reduced value be not 0 stage of pixel;
    (a-4) in superincumbent (a-3), if judge in all pixels of the X coordinate when the Y coordinate is n, exists a reduced value be not 0 pixel, in memory, the stage of the reduced value of all pixels of the X coordinate when storing the Y coordinate and being n;
    (a-5) in the above (a-3) in the stage if judge that the reduced value of all pixels of the X coordinate when the Y coordinate is n is 0, is that the color of pixel of n+1 is worth the stage on the color of pixel value that the Y coordinate of storing in the superscript memory is n with the Y coordinate;
    Judge in all pixels of the X coordinate when the Y coordinate is n+1 (a-6) whether having a reduced value is the stage of 0 pixel;
    (a-7) superincumbent (a-5) is in the stage, if judge that the reduced value of the pixel of the X coordinate when the Y coordinate is n+1 all is 0, n adds 1 (n=n+1), with the Y coordinate is after the color of pixel value of n+1 writes on color of pixel value top that the Y coordinate of storing in the memory in the above is n, turns back to the stage in top (a-6) stage; With
    (a-6) above moving repeatedly is (a-7) after the stage, if judge in whole pixels of the X coordinate when the Y coordinate is n+1, having a reduced value is 0 pixel, n is added 1 (n=n+1), in the above in the memory, the stage of the reduced value of all pixels of the X coordinate when storage Y coordinate is n.
  3. Memory using method when 3, the DVD sprite is decoded, transmit the DVD video data that promptly in DVD, writes down and the decoding sub-image data after, memory using method during with the sprite decoding of the sprite color of pixel value of decoding and the reduced value dvd system that stores memory into, it is characterized in that it comprises following several stages:
    (a) parameter n is decided to be 2 initial phase;
    All color of pixel values of X coordinate when (b) the Y coordinate being n store the stage of memory into;
    Judge in all pixels of the X coordinate when the Y coordinate is n that (c) reduced value is whole 0 stage whether;
    (d) in superincumbent (c),, be that the color of pixel value of n+1 writes on the stage on the color of pixel value that the Y coordinate that is stored in memory is n with the Y coordinate if judge that all pixel comparison values of the X coordinate when the Y coordinate is n all are 0;
    (e) the Y coordinate is in all pixels of X coordinate of n+1, and whether having a reduced value is not the judgement stage of 0 pixel;
    (f) superincumbent (e) is in the stage, if judging the Y coordinate is that the reduced value of pixel of the X coordinate of n+1 all is 0, n adds 1 (n=n+1), with the Y coordinate is after the color of pixel value of n+1 writes on the color of pixel value that the Y coordinate that is stored in the memory is n, turns back to the stage of top (e);
    (g) Shang Mian (e), (f) after the stage moves repeatedly, to have a reduced value in all pixels of X coordinate of n+1 be not 0 pixel if differentiate the Y coordinate and be, n adds 1 back (n=n+1), and storage Y coordinate is stage of reduced value of all pixels of the X coordinate of n in memory;
    (i) the storage reduced value is not the stage of the Y coordinate figure of 0 initial sprite;
    (j) carry out top Phase I after, n adds 1, finishing the Y coordinate is all colours of pixel of X coordinate of n and the process that reduced value stores memory into, by the Y coordinate figure of the initial sprite stored in the stage at (i), decision is shown the stage that the value of the SET_DAREA of sprite position is upgraded.
  4. Memory using method when 4, DVD sprite as claimed in claim 3 is decoded is characterized in that, wherein (j) stage
    Utilize the Y coordinate figure of the initial sprite that (i) in the above store in the stage, upgrade the Start Y coordinate figure of SET_DAREA.
CNB2004100531505A 2004-07-26 2004-07-26 Method for using memory in time of decoding sub image frame of DVD Expired - Fee Related CN100420295C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB2004100531505A CN100420295C (en) 2004-07-26 2004-07-26 Method for using memory in time of decoding sub image frame of DVD

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB2004100531505A CN100420295C (en) 2004-07-26 2004-07-26 Method for using memory in time of decoding sub image frame of DVD

Publications (2)

Publication Number Publication Date
CN1728804A true CN1728804A (en) 2006-02-01
CN100420295C CN100420295C (en) 2008-09-17

Family

ID=35927775

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB2004100531505A Expired - Fee Related CN100420295C (en) 2004-07-26 2004-07-26 Method for using memory in time of decoding sub image frame of DVD

Country Status (1)

Country Link
CN (1) CN100420295C (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1169258A (en) * 1997-08-20 1999-03-09 Fujitsu General Ltd Multi-channel display device
US6526214B2 (en) * 1998-04-13 2003-02-25 Oak Technology, Inc. DVD sub-picture decoder with minimal buffering
JP2000132953A (en) * 1998-10-22 2000-05-12 Toshiba Degital Frontier Kk Storage medium with recorded selection menu screen
JP2003018604A (en) * 2001-07-04 2003-01-17 Matsushita Electric Ind Co Ltd Image signal encoding method, device thereof and recording medium
EP1420580A1 (en) * 2002-11-18 2004-05-19 Deutsche Thomson-Brandt GmbH Method and apparatus for coding/decoding items of subtitling data

Also Published As

Publication number Publication date
CN100420295C (en) 2008-09-17

Similar Documents

Publication Publication Date Title
CN1148754C (en) Information reproduction system, information recording/reproduction system, and recording medium
JP4816262B2 (en) Playback apparatus, playback method, and playback program
US20070140667A1 (en) Reproducing apparatus, reproducing method, reproducing program, recording medium, data structure, authoring apparatus, authoring method, and authoring program
CN1314048C (en) Order of titles in real-time DVD video recording
CN1409859A (en) Multimedia Photo Albums
CN1864217A (en) Storage medium including text-based caption information, reproducing apparatus and reproducing method thereof
CN1244106C (en) Information recording device and method, and information recording medium recorded with recording control program
CN1700341A (en) Method, medium, and apparatus for deleting data and method, medium, and apparatus for restoring deletion data
CN1799259A (en) Information storage medium for storing subtitle and video mapping information, and method and apparatus for reproducing thereof
CN101031057A (en) Image recording apparatus and image displaying method
JP2004215045A (en) Information recording medium, information reproducing device, and information reproducing method
US20080126993A1 (en) Reproduction apparatus, display control method and display control program
CN1127058C (en) Method and apparatus for recording and replaying of video and/or audio signal
JP2002142195A (en) Recording medium as well as apparatus and method for information recording and processing
JPH11252459A (en) Image compositing device
CN1187750C (en) Information record device and method, and information record medium with recorded record controlling program
CN1202664C (en) Recording incomplete video streams
JP2004215046A (en) Information reproducing device, information reproducing method, information recording medium
JPH11168702A (en) Video signal processor with display position control function for plural video image
CN1816867A (en) Recording medium having data structure including graphic data and recording and reproducing methods and apparatuses
CN1269127C (en) Informaiton recording device and method, and information recording medium recorded with recording control program
CN1728804A (en) Method for using memory in time of decoding sub image frame of DVD
JPH11331777A (en) Three-dimensional noise reduction device and optical disk reproducing device using the same
CN1157733C (en) Information reproducing method and device
CN1126097C (en) CD playing back device

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20080917