CN102111661B - Method for displaying pictures by set top box (STB) in line-by-line decompression mode - Google Patents
Method for displaying pictures by set top box (STB) in line-by-line decompression mode Download PDFInfo
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- CN102111661B CN102111661B CN200910238911.7A CN200910238911A CN102111661B CN 102111661 B CN102111661 B CN 102111661B CN 200910238911 A CN200910238911 A CN 200910238911A CN 102111661 B CN102111661 B CN 102111661B
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- 230000006837 decompression Effects 0.000 title abstract description 12
- 230000015654 memory Effects 0.000 claims abstract description 32
- 238000004364 calculation method Methods 0.000 claims description 6
- 230000001419 dependent effect Effects 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The invention relates to a method for displaying pictures by a set top box (STB) in a line-by-line decompression mode. The method comprises the following steps: S1, reading original size information of a picture; S2, applying for a line of internal memory required by decomposing the picture according to the original size information of the picture; and S3, decomposing the picture line by line to the internal memory according to the original size information and final display size of the picture and displaying the picture. By the method, when a decompression space is applied, one line of internal memory space for decomposing the picture is only applied, and scaling is calculated in advance; and the calculated scaling is used to determine whether data in the line is used or not after a line of data is finished decompression, if the data is required to use, the line of data is required to scale, and then the next line of data is decomposed. By utilizing the line-by-line decompression technology, the decompression and display of a large-size picture are achieved in the small internal memory, thereby breaking the restriction that the STB can not display the large-size picture.
Description
Technical field
The present invention relates to set-top box technique, more particularly, relate to a kind of Set Top Box method of Showing Picture of decompress(ion) line by line.
Background technology
At present, the method that Set Top Box Shows Picture comprises the following steps.First read dimension of picture information, subsequently according to dimension of picture application decompress(ion) internal memory, then carry out decompress(ion), and calculate scaling according to picture original size and screen size, according to scaling, image zooming is shown to the applicable size of screen.The internal memory computational methods that usual decompress(ion) one pictures needs are: the internal memory that figure leaf length × picture width × 3 (value according to picture color change)=solution repoussage pictures needs.
But during in above process according to dimension of picture application decompress(ion) internal memory, in time needing the picture original size of display very large, the internal memory that usual decompress(ion) needs is very large, and Set Top Box cannot be assigned to enough internal memories, so cause picture to show unsuccessfully.Therefore, the size that current Set Top Box Shows Picture often is subject to the restriction of Set Top Box memory size, cannot show very large-sized picture.
Summary of the invention
The technical problem to be solved in the present invention is, Shows Picture by the defect of internal memory restriction for existing Set Top Box, provides a kind of Set Top Box method of Showing Picture of decompress(ion) line by line.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of Set Top Box method of Showing Picture of decompress(ion) line by line, the memory headroom that a line of uncompressed picture needs only is applied for when application decompression space, and calculate scaling in advance, after decompress(ion) completes a line, just determine whether the row data use according to the scaling calculated, if need to use again convergent-divergent this row good, and then the next line data that decompress.
The invention provides a kind of Set Top Box method of Showing Picture of decompress(ion) line by line, comprise the following steps:
S1, reading picture raw dimension information;
S2, the internal memory needed according to a line of picture raw dimension information application decompress(ion) picture;
S3, according to showing in picture raw dimension information and final display size line by line decompress(ion) picture to above-mentioned internal memory.
In the Set Top Box of the present invention method that decompress(ion) Shows Picture line by line, described step S3 comprises further:
S31, calculate image zooming ratio according to dimension of picture and final display size;
The packed data of a line of S32, reading picture unzips in the memory headroom of current application;
S33, determine that this row is the need of display, is go to step S34, otherwise abandons the row data, go to step S35 according to scaling;
S34, carry out according to scaling width convergent-divergent and show this row;
S35, judge whether scan complete picture, be terminate, otherwise go to step the packed data of S32 scanned picture next line.
In the Set Top Box of the present invention method that decompress(ion) Shows Picture line by line, in described step S1, picture raw dimension information is the length of picture, width and color format and the degree of depth.
In the Set Top Box of the present invention method that decompress(ion) Shows Picture line by line, according to the internal memory that a line of the change calculations decompress(ion) picture of the width of picture and color depth needs in described step S2.
In the Set Top Box of the present invention method that decompress(ion) Shows Picture line by line, in needing according to a line of the change calculations decompress(ion) picture of the color depth of picture in described step S2, save as 3 to 4 times of picture width.
In the Set Top Box of the present invention method that decompress(ion) Shows Picture line by line, in described step S31, image zooming ratio comprises length scale ratio and width scaling.
In the Set Top Box of the present invention method that decompress(ion) Shows Picture line by line, in described step S33 according to this row of length scale ratio-dependent the need of display.
In the Set Top Box of the present invention method that decompress(ion) Shows Picture line by line, carry out the convergent-divergent of width according to width scaling in described step S34 and show this row.
Implement the Set Top Box of the present invention method that Shows Picture of decompress(ion) line by line, there is following beneficial effect: the present invention utilizes decompression technique line by line, the realization of little internal memory can be utilized the decompression of large scale picture and display, breach the restriction that Set Top Box cannot show large scale picture.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the Set Top Box of the present invention schematic flow sheet of method that Shows Picture of decompress(ion) line by line.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.
The invention provides a kind of Set Top Box method of Showing Picture of decompress(ion) line by line, the problem of large scale picture can not be shown for the restriction solved due to Set Top Box internal memory.Referring to Fig. 1, is the Set Top Box of the present invention schematic flow sheet of method that Shows Picture of decompress(ion) line by line.As shown in Figure 1, method provided by the invention mainly comprises the following steps:
First in step sl, picture raw dimension information is read.This picture raw dimension information is at least the length of picture, width and color format and depth information, so that subsequent application internal memory uses.
Subsequently in step s 2, according to the internal memory that a line of picture raw dimension information application decompress(ion) picture needs.In this step, according to the internal memory that a line of the width of picture and the change calculations decompress(ion) picture of color depth needs, the memory size namely needed by the color of a point in picture calculates the internal memory of a line needs.Usually, save as 3 times of picture width to 4 times in the change calculations application according to the color depth of picture, to ensure normal decompression procedure.
Subsequently in step s3, i.e. step S31 to S35 in Fig. 1, according to showing in picture raw dimension information and final display size line by line decompress(ion) picture to above-mentioned internal memory.
In a preferred embodiment of the invention, the specific implementation process of above-mentioned steps S3 is as follows:
In step S31, calculate image zooming ratio according to dimension of picture and final display size.The scaling of this picture comprises length scale ratio and the width scaling of picture.
Subsequently in step s 32, the packed data reading a line of picture unzips in the memory headroom of current application.
Subsequently in step S33, determine that this row is the need of display, is go to step S34, otherwise abandons the row data, go to step S35 according to scaling.In this step, according to this row of length scale ratio-dependent of picture the need of showing.
Subsequently in step S34, carry out the convergent-divergent of width according to scaling and show this row.In this step, carry out the convergent-divergent of width according to the width scaling of picture and show.
In step s 35, judge whether to scan complete picture, be terminate, otherwise go to step the packed data of S32 scanned picture next line finally.
Two crucial parts of the present invention are as described below.First, the present invention only applies for that when application decompression space the memory headroom that a line of uncompressed picture needs carries out decompress(ion) line by line, which offers a saving a large amount of memory headroom, be generally original less than 1%, breach the restriction that Set Top Box cannot show large scale picture (more than 8,000,000 pixels).Secondly, the present invention, in the specific implementation process decompressed line by line, calculates scaling in advance, after decompress(ion) completes a line, just determine whether the row data use according to the scaling calculated, if need to use again convergent-divergent this row good, and then the next line data that decompress.Therefore, optimize handling process, improve decompression speed.
The present invention is described according to specific embodiment, but it will be understood by those skilled in the art that when not departing from the scope of the invention, can carry out various change and equivalent replacement.In addition, for adapting to specific occasion or the material of the technology of the present invention, can many amendments be carried out to the present invention and not depart from its protection range.Therefore, the present invention is not limited to specific embodiment disclosed herein, and comprises all embodiments dropping into claims.
Claims (7)
1. the Set Top Box method that Shows Picture of decompress(ion) line by line, is characterized in that, comprise the following steps:
S1, reading picture raw dimension information;
S2, the internal memory needed according to a line of picture raw dimension information application decompress(ion) picture;
S3, according to showing in picture raw dimension information and final display size line by line decompress(ion) picture to above-mentioned internal memory, specifically to comprise:
S31, calculate image zooming ratio according to dimension of picture and final display size;
The packed data of a line of S32, reading picture unzips in the memory headroom of current application;
S33, determine that this row is the need of display, is go to step S34, otherwise abandons the row data, go to step S35 according to scaling;
S34, carry out according to scaling width convergent-divergent and show this row;
S35, judge whether scan complete picture, be terminate, otherwise go to step the packed data of S32 scanned picture next line.
2. the Set Top Box according to claim 1 method that Shows Picture of decompress(ion) line by line, is characterized in that, in described step S1, picture raw dimension information is the length of picture, width and color format and the degree of depth.
3. the Set Top Box according to claim 2 method that Shows Picture of decompress(ion) line by line, is characterized in that, according to the internal memory that a line of the change calculations decompress(ion) picture of the width of picture and color depth needs in described step S2.
4. the Set Top Box according to claim 3 method that Shows Picture of decompress(ion) line by line, is characterized in that, saves as 3 to 4 times of picture width in described step S2 according to a line of the change calculations decompress(ion) picture of the color depth of picture in needing.
5. the Set Top Box according to claim 1 method that Shows Picture of decompress(ion) line by line, it is characterized in that, in described step S31, image zooming ratio comprises length scale ratio and width scaling.
6. the Set Top Box according to claim 5 method that Shows Picture of decompress(ion) line by line, is characterized in that, in described step S33 according to this row of length scale ratio-dependent the need of display.
7. the Set Top Box according to claim 5 method that Shows Picture of decompress(ion) line by line, is characterized in that, carry out the convergent-divergent of width and show this row in described step S34 according to width scaling.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910238911.7A CN102111661B (en) | 2009-12-29 | 2009-12-29 | Method for displaying pictures by set top box (STB) in line-by-line decompression mode |
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| CN200910238911.7A CN102111661B (en) | 2009-12-29 | 2009-12-29 | Method for displaying pictures by set top box (STB) in line-by-line decompression mode |
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| CN102111661A CN102111661A (en) | 2011-06-29 |
| CN102111661B true CN102111661B (en) | 2014-12-24 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103139632A (en) * | 2011-12-05 | 2013-06-05 | 康佳集团股份有限公司 | Image processing method and image processing device |
| CN103678543A (en) * | 2013-12-04 | 2014-03-26 | 康佳集团股份有限公司 | System and method for decompressing PNG (portable network graphic format) images line by line |
| CN103686306A (en) * | 2013-12-17 | 2014-03-26 | 康佳集团股份有限公司 | Method and system for displaying image in line-by-line decompression mode |
| CN105844588B (en) * | 2016-03-17 | 2019-05-24 | 广州筷子信息科技有限公司 | The intelligent scalable compression method and system of intention picture |
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| CN1328677A (en) * | 1998-11-30 | 2001-12-26 | 夏普公司 | Image display device |
| CN1625230A (en) * | 2003-12-01 | 2005-06-08 | 北京中视联数字系统有限公司 | Method of merging displaying any graphic |
| CN1933540A (en) * | 2005-09-15 | 2007-03-21 | 富士通株式会社 | Image processing apparatus and method for image resizing matching data supply speed |
| CN1988596A (en) * | 2005-12-22 | 2007-06-27 | 海信集团有限公司 | MPEG format picture display method for set-top box |
| CN101489026A (en) * | 2009-01-07 | 2009-07-22 | 深圳市同洲电子股份有限公司 | Set-top box starting control method, image display method and set-top box |
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- 2009-12-29 CN CN200910238911.7A patent/CN102111661B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1328677A (en) * | 1998-11-30 | 2001-12-26 | 夏普公司 | Image display device |
| CN1625230A (en) * | 2003-12-01 | 2005-06-08 | 北京中视联数字系统有限公司 | Method of merging displaying any graphic |
| CN1933540A (en) * | 2005-09-15 | 2007-03-21 | 富士通株式会社 | Image processing apparatus and method for image resizing matching data supply speed |
| CN1988596A (en) * | 2005-12-22 | 2007-06-27 | 海信集团有限公司 | MPEG format picture display method for set-top box |
| CN101489026A (en) * | 2009-01-07 | 2009-07-22 | 深圳市同洲电子股份有限公司 | Set-top box starting control method, image display method and set-top box |
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Address after: 518057 23rd floor, Konka R & D building, No. 28, Keji South 12th Road, high tech Zone, Yuehai street, Nanshan District, Shenzhen, Guangdong Patentee after: Shenzhen Konka Holding Group Co.,Ltd. Country or region after: China Address before: 518057 23rd floor, Konka R & D building, No. 28, Keji South 12th Road, high tech Zone, Yuehai street, Nanshan District, Shenzhen, Guangdong Patentee before: Shenzhen Konka Holding Group Co.,Ltd. Country or region before: China |
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