CN102209271A - Method for making high-definition set top box compatible with standard-definition service - Google Patents
Method for making high-definition set top box compatible with standard-definition service Download PDFInfo
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- CN102209271A CN102209271A CN 201110144080 CN201110144080A CN102209271A CN 102209271 A CN102209271 A CN 102209271A CN 201110144080 CN201110144080 CN 201110144080 CN 201110144080 A CN201110144080 A CN 201110144080A CN 102209271 A CN102209271 A CN 102209271A
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Abstract
The invention discloses a method for making a high-definition set top box compatible with a standard-definition service. The method is characterized by being implemented by the following steps of: marking the property of a front-end broadcast platform service: adding a high-definition service with a marking parameter HD and not marking a standard-definition service; and processing program streams: performing OSD (On Screen Display) layering processing on a digital television set under the condition of standard-definition service. By adopting the technical scheme, normal play of the standard-definition service on a high-definition playing platform of the digital television set is realized, the digital television set smoothly transits from an analog mode to a standard definition mode to a high definition mode during complete revolution, and excellent standard-definition program application is inherited in a high-definition age after complete revolution.
Description
Technical field
The present invention relates to radio and television and communication technical field, relate in particular to the method for the compatible SD business of Digital Television high definition set-top box.
Background technology
China began to carry out the analog-to-digital television operations of cable TV from 2007, by till the end of the year 2010, national digital cable customers has reached nearly 7000 general-purpose families.In whole Digital Television turn over process, because many-sided factors such as cost, market, what various places provinces and cities Virtual network operator was generally taked is that the turn over initial stage is based on the SD set-top box, the high definition set-top box is alternative, SD and high definition business are provided simultaneously, realize that high definition, SD are professional with broadcasting, progressively excessively professional to high definition, make to have formed SD and two hardware platforms of high definition in the whole transfer process.SARFT's instruction is: " high definition business, SD business are with broadcasting (being that same high definition platform takes high definition and SD mode to broadcast simultaneously); the high definition channel of broadcasting together behind the realization analog-to-digital signal; the business in first year broadcasts rate together and the high definition broadcasting percentage will be higher than 50%; second year will be higher than 70%; strive that the 3rd year reached full HD broadcast; first and second annual high definition channel prime time should all be broadcasted the high definition business, business such as the advertisement of high definition period broadcast, meteorology also should be accomplished the high definition broadcast." operator changes when the initial stage carries out translation at net, mostly is the SD set-top box scenario that adopts, correspondingly, most business all is the SD business.Along with increasing gradually of development high definition set-top box, high definition top-set hardware platform operation high definition business is no problem, but high definition top-set hardware platform the phenomenon that video dwindles will occur when playing the SD business, and this just requires existing SD business also can move on the high definition platform.
Broadcast requirement for realizing that SD is professional and the high definition business is same on high definition top-set hardware platform, several settling modes arranged:
1) the high definition top-set hardware platform of the corresponding original SD business of exploitation: though the display effect of high definition business on the high definition platform is good, need head end to dispose high definition and SD business simultaneously, occupied bandwidth is bigger; And exploitation high definition business wastes time and energy, if existing professional more, exploitation, test and lower deployment cost are all very high, and project risk is very big, and actual realization is worth not high;
2) dispose high definition and SD two cover display screens on the terminal platform simultaneously: two cover graphics plane, video plane and rest image planes are promptly arranged respectively.Show when SD is professional, switch to the SD screen; When high definition is professional, switch to the high definition screen.This scheme is subjected to the restriction of terminal hardware platform.Independent displaying layer in common figure, all corresponding hardware driving of video and rest image plane, this just requires to support in the hardware driving six display layers.Not every hardware platform can both meet this requirement, even if hardware platform can meet this requirement, operation is got up to the hardware resource occupancy also than higher, and aspect of performance also has certain decline.If adopt this kind scheme, will be very high to the hardware resource configuration requirement of high definition set-top box, thereby increased the top-set hardware cost, cause operator's cost when simulating net higher to digital network turn over, strengthen the turn over difficulty, and commence business to use and also can be subjected to hardware resource limitations, so scheme does not have versatility.
Summary of the invention
The object of the invention is to be implemented in Digital Television high definition playing platform normal play SD service application problem, make Digital Television turn over by simulating to SD again to the high definition smooth transition, the high definition epoch that outstanding SD program is applied in after the turn over are passed on, and solve following problem simultaneously:
1) alleviates the network bandwidth pressure of current cable television operators;
2) reduce the hardware configuration requirement of Digital Television high definition set-top box, for cable television operators and digital cable customers are reduced in simulated television cost problem when digital TV network is transformed;
3) effective utilization of raising set-top box under precondition, makes set-top box under the Limited resources condition, carries out more service application.
For achieving the above object, the technical scheme that the present invention proposes is: the method for the compatible SD business of high definition set-top box is characterized in that realizing by following method:
At first front end is broadcasted the platform service attribute and carry out mark: the high definition business is added sign Parameter H D, and the SD business is not done sign;
Secondly program stream is handled: during broadcast the service application sign is compared judgement, high definition is professional directly to be broadcasted, if SD business, then Digital Television being carried out the OSD layering handles: being treated to graphics plane wherein: plotting motion is still with (0,0) for the size of starting point be on the rectangular area of 720*576, when outputing to screen display, be enlarged into the zone of 1920*1080; Processing to video plane: respectively abscissa and ordinate are carried out the equal proportion convergent-divergent by high definition resolution; To being treated to of rest image plane: when showing rest image, do and the similar equal proportion convergent-divergent of video plane is handled, three layers handle respectively after, mixings that superpose again can realize high definition set-top box compatibility SD business.
Further, the opportunity of the processing of described step 2 pair program stream is for receiving the SD service application, but service application is not when also presenting.
Further, step 2 is described to abscissa with being treated to of video plane carried out the ratio that the equal proportion convergent-divergent is specially abscissa to abscissa and ordinate respectively in high definition resolution is 1920/720, and the ratio of ordinate is 1080/576.
Further, described being treated to the rest image plane of step 2: when showing rest image, doing the ratio that is treated to abscissa with the similar equal proportion convergent-divergent of video plane is 1920/720, and the ratio of ordinate is 1080/576.
Further comprise: the user finishes watching program and turns back to the high definition service application or cut platform when going to the high definition business platform, and system changes race-entry into the step of the default parameters of high definition platform automatically.
Description of drawings
Fig. 1 is the basic flow sheet of compatibility method of the present invention;
Fig. 2 is a schematic diagram after the processing of graphics plane;
Fig. 3 is the preceding schematic diagram of the processing of video plane;
Fig. 4 is a schematic diagram after the processing of video plane.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be further described.
Shown in the basic flow sheet that Fig. 1 is compatibility method of the present invention, the method of the compatible SD business of high definition set-top box, when the terminal use starts certain business, at first receive the service signal that head end broadcasts, if the HD sign is arranged, then belong to the high definition business, directly start and broadcast, behind the close of transmission, business withdraws from.If there is not the HD sign, then belong to the SD business, then start processing to program stream, promptly Digital Television OSD layering is handled, respectively the back being handled on graphics plane, video plane, rest image plane broadcasts, finish or user when withdrawing from when business at last, then return to the high definition display mode, business withdraws from.
Concrete, complete graphics plane output is finished by a plurality of plotting motions, for example, the picture sheet, writes, draws point, setting-out, picture rectangle etc.If the plotting motion that disperses is handled, realizing can more complicated.As shown in Figure 2, to being treated to of graphics plane: under the SD business, plotting motion draw still with (0,0) for the size of starting point is on the rectangular area of 720*576, when outputing to screen display, be enlarged into the zone of 1920*1080.
To being treated to of video plane: in our method, during video scaling, respectively abscissa and ordinate are carried out the equal proportion convergent-divergent by high definition resolution, the ratio of abscissa is 1920/720; The ratio of ordinate is 1080/576.Video plane is used to show the video images such as MPEG-2 of decoder output.Seeing under the tv state that be full screen display, output resolution ratio is 1920*1080.When starting digital television business, video can dwindle usually on certain zone of screen.For example, video takies 1/4th zones, the upper left corner of screen in certain SD business, because the resolution of SD business is 720*576, if do not carry out any processing, then video dwindles on the zone of 360*288.After adopting said method to handle, the length of video just becomes: 360*1920/720 equals 960; The width of video becomes: 288*1080/576 equals 540.Like this, under high definition resolution, video still occupies upper left 1/4th zones (as shown in Figure 3, Figure 4) of screen.
Processing to the rest image plane: the rest image plane is positioned under video layer and the graph layer.Under SD is used, show that a width of cloth resolution is the full frame rest image of 720*576.When showing rest image, do with the similar equal proportion convergent-divergent of video plane and handle.The scaling of abscissa is 1920/720; The scaling of ordinate is 1080/576.After the processing, rest image just outputs on the whole screen of 1920*1080 under high definition resolution.
Three layers handle respectively after, the mixing that superposes again, the SD business of 720*576 resolution just is being shown as on the screen under the screen mode toggle of 1920*1080, can realize the compatible SD business of high definition set-top box.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present invention that do not break away from appended claims and limited; in the form and details the present invention is made various variations, be protection scope of the present invention.
Claims (5)
1. the method for the compatible SD business of high definition set-top box is characterized in that: realize by following method:
At first front end is broadcasted the platform service attribute and carry out mark: the high definition business is added sign Parameter H D, and the SD business is not done sign;
Secondly program stream is handled: during broadcast the service application sign is compared judgement, high definition is professional directly to be broadcasted, if SD business, then Digital Television being carried out the OSD layering handles: being treated to graphics plane wherein: plotting motion is still with (0,0) for the size of starting point be on the rectangular area of 720*576, when outputing to screen display, be enlarged into the zone of 1920*1080; Processing to video plane: respectively abscissa and ordinate are carried out the equal proportion convergent-divergent by high definition resolution; To being treated to of rest image plane: when showing rest image, do and the similar equal proportion convergent-divergent of video plane is handled; Three layers handle respectively after, the mixing that superposes again can realize the compatible SD business of high definition set-top box.
2. the method for the compatible SD business of high definition set-top box according to claim 1, it is characterized in that: described processing to video plane: respectively abscissa and ordinate being carried out the ratio that the equal proportion convergent-divergent is specially abscissa in high definition resolution is 1920/720, and the ratio of ordinate is 1080/576.
3. the method for the compatible SD business of high definition set-top box according to claim 1, it is characterized in that: to being treated to of rest image plane: when showing rest image, doing the ratio that is treated to abscissa with the similar equal proportion convergent-divergent of video plane is 1920/720, and the ratio of ordinate is 1080/576.
4. according to the method for the compatible SD business of the described high definition set-top box of the arbitrary claim of claim 1-3, it is characterized in that: the opportunity of described processing to program stream is for receiving the SD service application, but service application is not when also presenting.
5. according to the method for the compatible SD business of the described high definition set-top box of the arbitrary claim of claim 1-3, it is characterized in that: the user finishes watching program and turns back to the high definition service application or cut platform when going to the high definition business platform, and system changes parameter into the step of the default parameters of high definition platform automatically.
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| CN 201110144080 CN102209271A (en) | 2011-05-31 | 2011-05-31 | Method for making high-definition set top box compatible with standard-definition service |
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| CN 201110144080 CN102209271A (en) | 2011-05-31 | 2011-05-31 | Method for making high-definition set top box compatible with standard-definition service |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103795971B (en) * | 2012-10-30 | 2016-12-28 | 3R全球有限公司 | Possess identifing source and automatically change DVR and the method for reseptance thereof of image received device |
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| CN101488353A (en) * | 2008-01-15 | 2009-07-22 | 上海敏速软件技术有限公司 | High-definition player |
| CN201298873Y (en) * | 2008-10-28 | 2009-08-26 | 福建新大陆通信科技有限公司 | Set-top box of high-definition digital television |
| CN101695133A (en) * | 2009-10-28 | 2010-04-14 | 北京大学 | Video encoding and decoding method, system and encoder for backwards compatible simulcast of low-resolution/high-resolution programs |
| CN201444655U (en) * | 2009-06-25 | 2010-04-28 | 青岛海尔软件有限公司 | Multifunctional digital set-top box |
| CN101742136A (en) * | 2008-11-18 | 2010-06-16 | 中兴通讯股份有限公司 | Multimedia terminal-based adaptive display method |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101316340A (en) * | 2007-06-01 | 2008-12-03 | 海尔集团公司 | Demonstration method of high resolution TV |
| CN101488353A (en) * | 2008-01-15 | 2009-07-22 | 上海敏速软件技术有限公司 | High-definition player |
| CN201298873Y (en) * | 2008-10-28 | 2009-08-26 | 福建新大陆通信科技有限公司 | Set-top box of high-definition digital television |
| CN101742136A (en) * | 2008-11-18 | 2010-06-16 | 中兴通讯股份有限公司 | Multimedia terminal-based adaptive display method |
| CN201444655U (en) * | 2009-06-25 | 2010-04-28 | 青岛海尔软件有限公司 | Multifunctional digital set-top box |
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| CN103795971B (en) * | 2012-10-30 | 2016-12-28 | 3R全球有限公司 | Possess identifing source and automatically change DVR and the method for reseptance thereof of image received device |
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Inventor after: Shen Ligang Inventor after: Shen Jiangtao Inventor before: Xu Haihua |
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Application publication date: 20111005 |