CN107371062A - The method of video pictures auto zoom - Google Patents
The method of video pictures auto zoom Download PDFInfo
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- CN107371062A CN107371062A CN201710741009.1A CN201710741009A CN107371062A CN 107371062 A CN107371062 A CN 107371062A CN 201710741009 A CN201710741009 A CN 201710741009A CN 107371062 A CN107371062 A CN 107371062A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440263—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA
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Abstract
The present invention relates to multimedia video play-back technology field, discloses a kind of method of video pictures auto zoom, overcomes the drawbacks of current video broadcasting pictures size is by setting interface to set manually.The solution of the present invention includes：After starting video playback, the laterally wide angle value of consumer-elcetronics devices video playback viewing area and longitudinal height value, and the horizontal width value for the video source being currently played and the height value of longitudinal direction are obtained；Then the new resolution width value of video is calculated；Video new resolution width value and original height value are then based on, calculates scaling multiple；Then according to scaling multiple, show that wide high level carries out etc., than calculating, showing that final video shows wide high level to new video；The last final wide high level of foundation, video pictures is shown with this size in viewing area, and uncovered viewing area is filled with black surround.The present invention is applied to video pictures scaling and handled.
Description
Technical field
The present invention relates to multimedia video play-back technology field, the more particularly to method of video pictures auto zoom.
Background technology
Video playback capability is one of audiovisual class consumer-elcetronics devices possessed Core Feature, the viewing body of video playback
Test the width and height dimensions shown with video pictures and its ratio is closely bound up, how to ensure that user can get optimal viewing picture
Size and ratioAt present the technological means that mainly uses be by provide the user visual picture dimension set interface come
Realize, user sets interface by operation control picture size, relatively all picture dimension patterns is attempted manually, then from all pictures
Pick out optimal picture dimension pattern in the size pattern of face to be watched, this technological means needs user to carry out cumbersome behaviour
Control and selection, Consumer's Experience extreme difference, efficiency is low, and the picture dimension schema category for setting interface to provide is limited, and
The species of video source is varied, and otherness is very big, so as to cause this technological means can not compatible all video sources
Picture dimension, there is very big technical limitation and application limitation.
The content of the invention
The technical problem to be solved in the present invention is：A kind of method of video pictures auto zoom is provided, overcomes current video
The drawbacks of broadcasting pictures size is by setting interface to set manually.
To solve the above problems, the technical solution adopted by the present invention is：The method of video pictures auto zoom, including step
Suddenly：
Step 1, after starting video playback, the laterally wide angle value of consumer-elcetronics devices video playback viewing area is obtained first
With longitudinal height value, and counted in units of pixel, this width value and height value can be that the consumer-elcetronics devices is shown
The value of the local rectangular portions of the value of the whole region of screen or the display screen of the consumer-elcetronics devices；
Step 2, the resolution information for the video source being currently played, including horizontal width value and the height of longitudinal direction are obtained
Angle value, and counted in units of pixel, calculate this video and store the ratio of width to height (SAR, storage aspect ratio) letter
Breath；
Step 3, the display the ratio of width to height (DAR, display aspect ratio) for the video source being currently played is obtained
Metadata information, DAR information are a string expressions, are expressed as：W:H, and record the information；
Step 4, judgment step 3 gets whether DAR information is effective, and effective criterion is the width in DAR information
Value W and height value H are all higher than 0, and otherwise DAR information is as invalid, when DAR information is invalid, into step 5, when DAR information has
During effect, then into step 6；
Step 5, in above step 4, when DAR information is invalid, the single pixel for the video source being currently played is obtained
The ratio of width to height (PAR, pixel aspect ratio) metadata information, it is a string expression to get PAR information, is represented
For：W：H, if it is ineffective for 0, PAR information to get in PAR information width value W and height value H, otherwise PAR information without
Effect, when PAR information is effective, the DAR values of video source are multiplied by PAR values, i.e. DAR=SAR*PAR equal to the SAR value of step 2；If obtain
Get that PAR values are invalid, then DAR values are equal to the SAR value of step 2, and enter step 6；
Step 6, whether after effective DAR values are obtained, it is equal with the SAR of step 2 value to compare the DAR values, if than
Equal compared with result, then the new width value of video original resolution is consistent with original value, i.e. Wn=W, and is directly entered step
Rapid 9, otherwise into step 7, recalculate new resolution width value；
Step 7, when result of the comparison is unequal in step 6, the PAR values that video is currently played, PAR values are calculated
Equal to DAR values divided by SAR value, i.e. PAR=DAR/SAR；
Step 8, the resolution adjustment value for the video being currently played, the side of calculating are calculated with the PAR values obtained by step 7
Formula is to maintain step 2 and gets that original resolution height value is constant, and new width value gets original resolution width equal to step 2
Value is multiplied by PAR values, i.e. Wn=W*PAR；
Step 9, the new resolution width Wn values of video and original height H values are got based on preceding step, contrasts step 1
The width and height value of the video playback viewing area got, by the way that the minimum multiple value of amplification is calculated or reduces
Maximum multiple value；
Step 10, the scaling multiple got according to step 9, show that wide high level carries out etc., than calculating, obtaining to new video
Go out final video and show wide high level；
Step 11, the final wide high level being calculated according to step 10, video pictures are entered with this size in viewing area
Row display, and uncovered viewing area is filled with black surround.So far, the processing stream of whole video pictures auto zoom is completed
Journey, realize the automatic optimal scaling processing of video playback picture.
Further, step 9 needs before the minimum multiple value of amplification or the maximum multiple value reduced is calculated
Determine to be to perform to reduce or perform enhanced processing to video pictures；Wherein, when new resolution width value is broadcast more than video
The width value of viewing area is put, or when high resolution angle value is more than the height value of video playback viewing area, video is drawn
Face performs diminution processing, just needs to be amplified video pictures processing in the case of remaining.
Further, the method that video pictures multiplication factor calculates is first to calculate the width value of video display area with regarding
The ratio of the new resolution width value of frequency, draws a times magnification numerical value N1, then calculates the height value of video display area with regarding
The ratio of frequency division resolution height value, draw another multiplication factor N2, take the minimum value in N1 and N2 as video pictures most
Whole times magnification numerical value.
Further, the method for the calculating of video pictures minification is first to calculate new resolution width value with video to show
Show the ratio of peak width value, draw a minification value M1, then calculating resolution height value and video display area are high
The ratio of angle value, a minification value M2 is drawn, takes the minification that the maximum in M1 and M2 is final as video pictures
Value.
Further, the width value and the computational methods of height value that final video picture is shown be, when needing amplification, most
The width value that whole video pictures are shown is multiplied by multiplication factor for the width value of new resolution ratio, i.e. Wd=Wn*Min (N1, N2), finally
The height value that video pictures are shown is multiplied by multiplication factor, i.e. Hd=H*Min (N1, N2) for the height value of resolution ratio；When needing to contract
Hour, the width value that final video picture show for new resolution ratio width value divided by minification, i.e. Wd=Wn/Max (M1,
M2), the height value that final video picture is shown be resolution ratio height value divided by minification, i.e. Hd=H/Max (M1, M2).
The beneficial effects of the invention are as follows：With the method for the invention it is achieved that video viewing display picture size is automatic
Zoom display is optimized, it is fully automated, participated in without artificial, it is not necessary to any operating steps, greatly improve video playback
Viewing experience, meanwhile, method of the invention be suitable for all video sources picture dimension scaling processing, so as to overcome tradition
The limitation of technological means, there is great technical advance and practical value.
Brief description of the drawings
Fig. 1 is the flow chart of embodiment.
Embodiment
As shown in figure 1, the idiographic flow of the present invention includes：
Step 1, after starting video playback, the laterally wide angle value of consumer-elcetronics devices video playback viewing area is obtained first
With longitudinal height value, and counted in units of pixel, this width value and height value can be that the consumer-elcetronics devices is shown
The value of the local rectangular portions of the value of the whole region of screen or the display screen of the consumer-elcetronics devices；
Step 2, the resolution information for the video source being currently played, including horizontal width value and the height of longitudinal direction are obtained
Angle value, and counted in units of pixel, calculate this video and store the ratio of width to height (SAR, storage aspect ratio) letter
Breath；
Step 3, the display the ratio of width to height (DAR, display aspect ratio) for the video source being currently played is obtained
Metadata information, DAR information are a string expressions, are expressed as：W:H, and record the information；
Step 4, judgment step 3 gets whether DAR information is effective, and effective criterion is the width in DAR information
Value W and height value H are all higher than 0, and otherwise DAR information is as invalid, when DAR information is invalid, into step 5, when DAR information has
During effect, then into step 6；
Step 5, in above step 4, when DAR information is invalid, the single pixel for the video source being currently played is obtained
The ratio of width to height (PAR, pixel aspect ratio) metadata information, it is a string expression to get PAR information, is represented
For：W：H, if it is ineffective for 0, PAR information to get in PAR information width value W and height value H, otherwise PAR information without
Effect, when PAR information is effective, the DAR values of video source are multiplied by PAR values, i.e. DAR=SAR*PAR equal to the SAR value of step 2；If obtain
Get that PAR values are invalid, then DAR values are equal to the SAR value of step 2, and enter step 6；
Step 6, whether after effective DAR values are obtained, it is equal with the SAR of step 2 value to compare the DAR values, if than
Equal compared with result, then the new width value of video original resolution is consistent with original value, i.e. Wn=W, and is directly entered step
Rapid 9, otherwise into step 7, recalculate new resolution width value；
Step 7, when result of the comparison is unequal in step 6, the PAR values that video is currently played, PAR values are calculated
Equal to DAR values divided by SAR value, i.e. PAR=DAR/SAR；
Step 8, the resolution adjustment value for the video being currently played, the side of calculating are calculated with the PAR values obtained by step 7
Formula is to maintain step 2 and gets that original resolution height value is constant, and new width value gets original resolution width equal to step 2
Value is multiplied by PAR values, i.e. Wn=W*PAR；
Step 9, first contrast preceding step get new resolution width, highly with video playback viewing area field width
Degree, height, if new resolution width value is more than the width value of video playback viewing area, or when high resolution angle value is more than
During the height value of video playback viewing area, then need to perform video pictures diminution processing, just need to video in the case of remaining
Picture is amplified processing；
It is then based on preceding step and gets the new resolution width Wn values of video and original height H values, contrast step 1 obtains
The width and height value for the video playback viewing area got, what the minimum multiple value by the way that amplification is calculated either reduced
Maximum multiple value；
Wherein, the method for the calculating of video pictures minification is：First calculate new resolution width value and video viewing area
The ratio of field width angle value, a minification value M1 is drawn, then calculating resolution height value and video display area height value
Ratio, draw a minification value M2, take the minification value that the maximum in M1 and M2 is final as video pictures；
The method of the calculating of video pictures minification is：First calculate new resolution width value and video display area width
The ratio of value, a minification value M1 is drawn, then the ratio of calculating resolution height value and video display area height value,
A minification value M2 is drawn, takes the minification value that the maximum in M1 and M2 is final as video pictures；
Step 10, the scaling multiple got according to step 9, show that wide high level carries out etc., than calculating, obtaining to new video
Go out final video and show wide high level；
Step 11, the final wide high level being calculated according to step 10, video pictures are entered with this size in viewing area
Row display, and uncovered viewing area is filled with black surround.Wherein, final video picture is shown width value and height value
Computational methods are：When needing amplification, the width value that final video picture is shown is multiplied by times magnification for the width value of new resolution ratio
Number, i.e. Wd=Wn*Min (N1, N2), the height value that final video picture is shown are multiplied by multiplication factor for the height value of resolution ratio,
That is Hd=H*Min (N1, N2)；When needing to reduce, the width value that final video picture is shown removes for the width value of new resolution ratio
With minification, i.e. Wd=Wn/Max (M1, M2), height value divided by contracting of the height value that final video picture is shown for resolution ratio
Small multiple, i.e. Hd=H/Max (M1, M2).
So far, the handling process of whole video pictures auto zoom is completed, realizes the automatic optimal of video playback picture
Scaling processing.
Embodiment
Embodiment provides a kind of method that auto zoom is carried out to video playback picture, is specifically described below.
Signified consumer-elcetronics devices includes in embodiment：Intelligent television, smart mobile phone, tablet personal computer, smart projector,
Above consumer-elcetronics devices is only citing, not exhaustive, including but not limited to above-mentioned terminal device.
As shown in Figure 1, it is the entire flow of video pictures auto zoom processing, specifically comprises the following steps：
Intelligent television, which starts, plays an Internet video program, entitled " the weekend movie theatre " of program；
Step 1, after starting the broadcasting of " weekend movie theatre " program, the horizontal stroke of this intelligent television video playback viewing area is obtained first
To width value and longitudinal height value, and counted in units of pixel, in this example, we select whole intelligent television
Screen is the viewing area of video playback, and the width that viewing area is got by systems approach is 1920 pixels, is highly
1080 pixels, are recorded as Wx=1920, Hx=1080；
Step 2, the resolution information of video frequency program " weekend movie theatre " is obtained, its width value is 960 pixels, its height value
For 400 pixels, i.e. W=960, H=400, storage the ratio of width to height SAR=960 of calculating video frequency program " weekend movie theatre "：400=
2.40：1；
Step 3, interface is extracted by player original data message, the display for obtaining current video program " weekend movie theatre " is wide
Ratios, DAR=16:9；
Step 4, because the width of DAR information is both greater than 0, DAR values effectively with height ratio, it is directly entered step 6；
Step 6, the SAR=2.40 obtained by step 2:1, the DAR=16 obtained by step 3:9, therefore two ratios are not
Deng then into step 7；
Step 7, the PAR values of video frequency program " weekend movie theatre " are calculated, PAR values are equal to DAR values divided by SAR value, i.e. PAR=
DAR/SAR, PAR=(16:9)/(2.40:1)=3:4；
Step 8, by the PAR=3 obtained by step 7:4, keep step 2 constant, the i.e. Hn that gets original resolution height value
=H=400, new width value Wn get original resolution width value W equal to step 2 and are multiplied by PAR values, i.e. Wn=W*PAR=
960*3/4=720；
Step 9, the new resolution width Wn=720 and height Hn=400 of video is got based on preceding step 8, contrasted
The width Wx=1920 and height value Hx=1080 for the video playback viewing area that step 1 is got, due to new resolution height
It is less than the width and height of viewing area with width degree, therefore is handled using amplification mode, the multiplication factor N1=1920/ of width
720=2.667, the multiplication factor N2=1080/400=2.7 of height, thus take minimum multiplication factor Min (N1, N2)=
2.667；
Step 10, the minimum multiplication factor 2.667 got according to step 9, it is wide high that final video display is calculated
Value is respectively Wd=1920, Hd=1066；
Step 11, the final wide high level being calculated according to step 10, video pictures are entered with this size in viewing area
Row display, due to the unfilled whole screen of video height, 1080-1066=14, therefore use systems approach each polishing 7 up and down
The blank screen region of pixel.So far, the handling process of whole video pictures auto zoom is completed, realizes video playback picture oneself
Dynamic optimal scaling processing.
The general principle of the present invention and main feature are the foregoing described, the description of specification simply illustrates the original of the present invention
Reason, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes and improvements
It all fall within the protetion scope of the claimed invention.
Claims (5)
1. the method for video pictures auto zoom, it is characterised in that including step：
Step 1, after starting video playback, laterally wide angle value and the longitudinal direction for obtaining consumer-elcetronics devices video playback viewing area are high
Angle value, and counted in units of pixel；
Step 2, the resolution information for the video source being currently played, including horizontal width value and the height of longitudinal direction are obtained
Value, and counted in units of pixel, calculate the SAR information of this video；
Step 3, the DAR metadata informations for the video source being currently played are obtained, and record the information；
Step 4, judgment step 3 gets whether DAR information effective, effective criterion be width value W in DAR information and
Height value H is all higher than 0, and otherwise DAR information is as invalid, when DAR information is invalid, into step 5, and when DAR information is effective,
Then enter step 6；
Step 5, the PAR metadata informations for the video source being currently played are obtained, if get in PAR information width value W and
Height value H is not 0, then PAR information is effective, and otherwise PAR information is invalid, when PAR information is effective, DAR values of video source etc.
PAR values are multiplied by the SAR value of step 2；If getting, PAR values are invalid, and DAR values are equal to the SAR value of step 2, and enter step
6；
Step 6, it is whether equal with the SAR of step 2 value to compare the DAR values, if comparative result is equal, video original resolution
New width value Wn and original value W be consistent, and step 9 is directly entered, otherwise into step 7；
Step 7, the PAR values that video is currently played are calculated, the PAR values that video is currently played are equal to DAR values divided by SAR
Value；
Step 8, the resolution adjustment value for the video being currently played is calculated with the PAR values obtained by step 7, the mode of calculating is
Keeping step 2 to get, original resolution height value is constant, and new width value gets original resolution width value equal to step 2 and multiplied
With PAR values；
Step 9, based on the new resolution width Wn values of video and original height H values, the video playback that contrast step 1 is got shows
Show the width and height value in region, pass through the maximum multiple value that the minimum multiple value of amplification is calculated or reduces；
Step 10, the scaling multiple got according to step 9, show that wide high level carries out etc., than calculating, drawing most to new video
Whole video shows wide high level；
Step 11, the final wide high level being calculated according to step 10, video pictures are shown with this size in viewing area
Show.
2. the method for video pictures auto zoom as claimed in claim 1, it is characterised in that amplification is being calculated in step 9
Minimum multiple value either reduce maximum multiple value before, it is thus necessary to determine that to video pictures be perform reduce or perform put
Big processing；Wherein, when width value of the new resolution width value more than video playback viewing area, or when high resolution angle value
More than video playback viewing area height value when, to video pictures perform diminution processing.
3. the method for video pictures auto zoom as claimed in claim 2, it is characterised in that video pictures multiplication factor calculates
Method be first to calculate the ratio of width value and the new resolution width value of video of video display area, draw a times magnification
Numerical value of N 1, ratio of the height value with video resolution height value of video display area is then calculated, draws another amplification
Multiple N2, take the times magnification numerical value that the minimum value in N1 and N2 is final as video pictures.
4. the method for video pictures auto zoom as claimed in claim 2, it is characterised in that the meter of video pictures minification
The method of calculation is first to calculate the ratio of new resolution width value and video display area width value, draws a minification value
M1, then calculating resolution height value and video display area height value ratio, draw a minification value M2, take M1 and
Maximum in the M2 minification value final as video pictures.
5. the method for the video pictures auto zoom as described in claim 3 or 4, it is characterised in that final video picture is shown
Width value and the computational methods of height value be that, when needing amplification, the width value that final video picture is shown is new resolution ratio
Width value be multiplied by multiplication factor, the height value that final video picture is shown is multiplied by multiplication factor for the height value of resolution ratio；When
When needing to reduce, the width value that final video picture is shown is the width value divided by minification of new resolution ratio, and final video is drawn
The height value that face is shown is the height value divided by minification of resolution ratio.
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| WO2022105345A1 (en) * | 2020-11-23 | 2022-05-27 | 青岛海信传媒网络技术有限公司 | Display device |
| CN113411637A (en) * | 2021-07-05 | 2021-09-17 | 北京海誉动想科技股份有限公司 | Picture processing method and device |
| CN113411637B (en) * | 2021-07-05 | 2022-06-24 | 北京海誉动想科技股份有限公司 | Picture processing method and device |
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