CN100364323C - Method for displaying high resolution JPEG picture using embedded Linux system TV set - Google Patents
Method for displaying high resolution JPEG picture using embedded Linux system TV set Download PDFInfo
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- CN100364323C CN100364323C CNB2006100328238A CN200610032823A CN100364323C CN 100364323 C CN100364323 C CN 100364323C CN B2006100328238 A CNB2006100328238 A CN B2006100328238A CN 200610032823 A CN200610032823 A CN 200610032823A CN 100364323 C CN100364323 C CN 100364323C
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Abstract
The present invention relates to a method for displaying high resolution JPEG pictures in a television adopting an embedded type Linux system, and comprises the following procedures that compressed data of a JPEG picture, which corresponds to the JPEG picture, is divided into at least two blocks; each block of compressed data of the JPEG picture is decoded in turn, and each block of decoded sub-picture goes through zooming and is displayed on OSD. The present invention decodes the compressed data of the JPEG picture corresponding to the JPEG picture and immediately carries out zooming transform and display. A memory buffer zone is established in a memory, and the operation of decoding software, zooming software and display software is independent and without mutual influence. The JPEG picture can go through zooming after the compressed data of the partial JPEG picture are decoded, and the picture can be displayed by the display software after partial picture goes through zooming. Accordingly, a great deal of decoding waiting time and zooming waiting time are saved and display speed is greatly raised.
Description
Technical field
The present invention relates to a kind of method of the JPEG of demonstration picture, be particularly related to a kind of TV display of high resolution (resolution that 1,000,000 pixels are above) JPEG picture of embedded Linux system that adopts to the screen display method of (on-screen display is called for short OSD).
Background technology
In the common computer, the method for display of high resolution JPEG picture is: JPEG picture compression data are all read in the internal memory decode, after to be decoded the finishing, picture in its entirety is carried out convergent-divergent by certain algorithm, and then be presented on the screen.Because CPU (CPU) function ratio of computer is more powerful, so the speed of its display of high resolution JPEG picture is very fast.
Embedded Linux system and CPU (CPU) function that television set adopts are powerful inadequately, and speed is slow and internal memory is few, and does not generally have the JPEG hardware decoder, and its decoding speed is affected.And the response speed of the OSD of television set is slow, so adopt the TV display of high resolution JPEG picture of embedded Linux system slow to the speed on the OSD.
Summary of the invention
The present invention has overcome deficiency of the prior art, and a kind of method that adopts the television set display of high resolution JPEG picture of embedded Linux system is provided.
Technical scheme of the present invention is summarized as follows: a kind of method that adopts the television set display of high resolution JPEG picture of embedded Linux system comprises following steps:
(1) the JPEG picture compression data with JPEG picture correspondence are divided at least two;
(2) the every JPEG picture compression data of decoding are successively carried out convergent-divergent with the every sub-pictures that decodes and are presented on the OSD.
Whenever finish the decoding of JPEG picture compression data in the described step (2), just the sub-pictures that decodes is stored in the core buffer, and the sub-pictures that startup convergent-divergent software will be stored in the core buffer carries out scale transformation.
Whenever finish the decoding of JPEG picture compression data, just carry out the decoding of next piece JPEG picture compression data.
Sub-pictures stores in the core buffer after scale transformation becomes picture to be shown, and software for display takes out this picture to be shown and is presented on the OSD in core buffer.
Described step (2) can comprise following steps afterwards: judge whether that whole JPEG picture all is presented on the OSD, if just finish.
Adopt decoding software that every JPEG picture compression data are decoded.
Adopt convergent-divergent software that the every sub-pictures that decodes is carried out scale transformation.
Picture to be shown after adopting software for display to scale transformation is handled.
JPEG picture compression data with 500,000 to one mega pixels in the described step (1) are divided into one.
Compared with prior art, effect of the present invention is: by the piecemeal JPEG picture compression data of corresponding JPEG picture of decoding, and carry out scale transformation and demonstration immediately.Set up core buffer in internal memory, decoding software, convergent-divergent software and software for display can work independently, and are independent of each other.Do not need whole JPEG picture compression data to carry out convergent-divergent again after all decoding finishes, the convergent-divergent that also need not finish picture in its entirety is shown by software for display afterwards again, save a large amount of decoding stand-by period and convergent-divergent stand-by period, improved display speed greatly.Though the present invention adopts function and poor embedded Linux system and the CPU of speed, does not also have under the situation of JPEG hardware decoder, display of high resolution JPEG picture is to OSD fast.Under the situation of saving product cost, improved the display performance of television set.Because adopt the mode of piecemeal decoding, piecemeal convergent-divergent, piecemeal demonstration, memory requirements is few and utilance is high, than existing method save memory space more.
Description of drawings
Accompanying drawing is a schematic flow sheet of the present invention.
Embodiment
As shown in drawings, a kind of method that adopts the television set display of high resolution JPEG picture of embedded Linux system comprises following steps:
The first step: when television set begins to show the JPEG picture, obtain the size information of picture earlier by Joint Photographic Experts Group, according to this information JPEG picture compression data are divided at least two, every is 500,000 to one mega pixels.
Second step: decoding software is decoded to first JPEG picture compression data earlier, after decoding is finished, first sub-pictures that decodes is stored in the core buffer, continuation is decoded to next piece JPEG picture compression data, and start convergent-divergent software and will be stored in first sub-pictures in the core buffer and carry out scale transformation and become first picture to be shown of suitable size and store in the core buffer, software for display takes out first picture to be shown and is shown on the OSD in core buffer.The shared internal memory of first image data that has shown will be discharged immediately, with the save memory space, improves memory usage.
When decoding software is finished the decoding of first JPEG picture compression data, decoding software is decoded second JPEG picture compression data, after decoding is finished, second sub-pictures that decodes is stored in the core buffer, continuation is decoded to next piece JPEG picture compression data, and start convergent-divergent software and will be stored in second sub-pictures in the core buffer and carry out scale transformation and become second picture to be shown of suitable size and store in the core buffer, software for display takes out first picture to be shown and is shown on the screen display in core buffer.The shared internal memory of second image data that has shown will be discharged immediately.
Repeat above operation, to the last JPEG picture compression data are decoded goes out corresponding sub-pictures and stores in the core buffer, convergent-divergent software carries out the suitably big or small picture corresponding to be shown of scale transformation one-tenth with this sub-pictures and stores in the core buffer, and software for display takes out this picture to be shown and is shown on the screen display in core buffer.The shared internal memory of the image data that has shown will be discharged immediately, with the save memory space, improves memory usage.
The 3rd step: judge whether that whole JPEG picture all has been presented at screen display, if then finish.
Adopt above method, link up by message between decoding software, convergent-divergent software, the software for display, by message informing convergent-divergent software decoded sub-pictures is carried out scale transformation after decoding is finished and handle; After convergent-divergent is finished, show processing by convergent-divergent software notice software for display.The core buffer of above-mentioned three calling software modules is shared, and is expanded separately and is discharged by each software module.Above method is according to standardized requirement, and all operations all are designed to the mode at the core buffer operation, has strengthened the versatility of this method.Simultaneously high score rate JPEG picture piecemeal is shown, can reduce the load that each OSD shows, improved the speed that shows high score rate JPEG picture.
Claims (6)
1. method that adopts the television set display of high resolution JPEG picture of embedded Linux system is characterized in that:
Comprise following steps:
(1) the JPEG picture compression data with JPEG picture correspondence are divided at least two;
(2) the every JPEG picture compression data of decoding are successively carried out convergent-divergent with the every sub-pictures that decodes and are presented on the OSD, and it specifically comprises the steps:
(2A) earlier first JPEG picture compression data decoded, after decoding is finished, first sub-pictures that decodes is stored in the core buffer, continuation is decoded to next piece JPEG picture compression data, and will be stored in first sub-pictures in the core buffer and carry out scale transformation and become first picture to be shown of suitable size and store in the core buffer, in core buffer, take out first picture to be shown and be shown on the OSD;
After (2B) second JPEG picture compression data decode finished, second sub-pictures that decodes is stored in the core buffer, continuation is decoded to next piece JPEG picture compression data, and will be stored in second sub-pictures in the core buffer and carry out scale transformation and become second picture to be shown of suitable size and store in the core buffer, in core buffer, take out first picture to be shown and be shown on the screen display;
(2C) repeat above operation, to the last JPEG picture compression data are decoded goes out corresponding sub-pictures and stores in the core buffer, this sub-pictures is carried out scale transformation become the picture corresponding to be shown of suitable size and store in the core buffer, in core buffer, take out this picture to be shown and be shown on the screen display.
2. the method for the television set display of high resolution JPEG picture of employing embedded Linux system according to claim 1, it is characterized in that: described step (2) can comprise following steps afterwards: judge whether that whole JPEG picture all has been presented on the OSD, if just finish.
3. the method for the television set display of high resolution JPEG picture of employing embedded Linux system according to claim 1 and 2 is characterized in that:
Adopt decoding software that every JPEG picture compression data are decoded.
4. the method for the television set display of high resolution JPEG picture of employing embedded Linux system according to claim 1 and 2 is characterized in that:
Adopt convergent-divergent software that the every sub-pictures that decodes is carried out scale transformation.
5. the method for the television set display of high resolution JPEG picture of employing embedded Linux system according to claim 1 and 2 is characterized in that:
Picture to be shown after adopting software for display to scale transformation is handled.
6. the method for the television set display of high resolution JPEG picture of employing embedded Linux system according to claim 1 and 2 is characterized in that:
JPEG picture compression data with 500,000 to one mega pixels in the described step (1) are divided into one.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006100328238A CN100364323C (en) | 2006-01-13 | 2006-01-13 | Method for displaying high resolution JPEG picture using embedded Linux system TV set |
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| CNB2006100328238A CN100364323C (en) | 2006-01-13 | 2006-01-13 | Method for displaying high resolution JPEG picture using embedded Linux system TV set |
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| CN1822656A CN1822656A (en) | 2006-08-23 |
| CN100364323C true CN100364323C (en) | 2008-01-23 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4985034B2 (en) * | 2007-03-29 | 2012-07-25 | ブラザー工業株式会社 | Deployment data creation method, apparatus and program |
| CN101370142B (en) * | 2008-09-18 | 2011-05-04 | 华为技术有限公司 | Image decoding and zooming method and device, image display system |
| CN102665056A (en) * | 2012-04-28 | 2012-09-12 | 青岛海信信芯科技有限公司 | Display method for videos and images in display terminals |
| CN103634597B (en) * | 2013-11-15 | 2015-09-30 | 四川长虹电器股份有限公司 | A kind of method of decoding picture on 4K2K television set |
| CN104156192B (en) * | 2014-08-25 | 2017-12-26 | 广东威创视讯科技股份有限公司 | A kind of display methods and system of magnanimity bayonet socket data |
| CN106445833B (en) * | 2016-10-17 | 2020-09-25 | 腾讯科技（深圳）有限公司 | Reader-based picture display method and device |
| CN112437303A (en) * | 2020-11-12 | 2021-03-02 | 北京深维科技有限公司 | JPEG decoding method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405757A (en) * | 2001-09-11 | 2003-03-26 | 三星电子株式会社 | CD reproducing system and method of reproducing static pictures |
| KR20040067433A (en) * | 2003-01-23 | 2004-07-30 | 엘지전자 주식회사 | DVD decoder |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405757A (en) * | 2001-09-11 | 2003-03-26 | 三星电子株式会社 | CD reproducing system and method of reproducing static pictures |
| KR20040067433A (en) * | 2003-01-23 | 2004-07-30 | 엘지전자 주식회사 | DVD decoder |
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