CN102625181A - Set top box with caption recognition and definition display functions - Google Patents
Set top box with caption recognition and definition display functions Download PDFInfo
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- CN102625181A CN102625181A CN2012100723887A CN201210072388A CN102625181A CN 102625181 A CN102625181 A CN 102625181A CN 2012100723887 A CN2012100723887 A CN 2012100723887A CN 201210072388 A CN201210072388 A CN 201210072388A CN 102625181 A CN102625181 A CN 102625181A
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Abstract
The invention discloses a set top box with caption recognition and definition display functions. The set top box comprises a configuration part and a streaming media processing part, wherein the steaming media processing part comprises a network processing module, an audio/video decoding module and an image mixing television signal output module, which are connected in sequence; a caption recognition module is further connected between the audio/video decoding module and the image mixing television signal output module; the caption recognition module comprises the following processing procedures: acquisition of caption areas of an entire frame of image, image sharpening, optical character recognition, caption formatting and synchronous display with a video; and the configuration part is additionally provided with a caption recognition switch function and a caption setting format. According to the invention, the software function expansion can be realize for IPTV (Internet Protocol Television) set top boxes of any model, and the caption recognition function can be realized without hardware regulation.
Description
Technical field
The present invention relates to a kind of consumer electronics product, can detect, the captions in the identification video signal, and carry out the STB of sharpening, enlarged and displayed.
Background technology
Along with the development of TV tech, video screen develops into 17 cun, 29 cun, 32 cun, 40 cun etc. from 9 inches, but because to the consideration of closely TV radiation, ocular damage, people advocate and beyond 2-3 rice, watch TV.For the people of old or amblyopia, the decline of the visual quality of reception can be accepted, but the captions that can't accept to blur, less relatively at screen especially, the unsharp situation of video frequency program quality.This just puts forward a function, through detect and the identification video signal in captions, with the literal that identifies adopt again more clearly font, more strikingly color and more suitably size be presented on the screen, do not influence the image of other parts simultaneously.For twenty-twenty spectators, also can be with more comfortable mode browsing video captions.
This function can depend on the IPTV STB; The video resource that gets access to through network is saved in the buffer area through the form with picture behind the video decode; The application program of processor operation OCR (optical character identification) is periodically discerned certain the two field picture appointed area in the buffer memory, the literal that identifies is shown independent to screen.
Summary of the invention
For can solve since video screen less relatively, the bad captions that cause of video decode quality are unintelligible; Make the people of old or poor or weak eyesight can find out captions clearly; Make the captions of browsing that twenty-twenty spectators can be more comfortable; Need in TV set-top box, increase the subtitle recognition function, after the subtitle recognition with the appointed area, with font more clearly, more strikingly color and more suitably size be presented on the screen.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention realizes through following technical scheme:
A kind of STB with subtitle recognition and sharpening Presentation Function; Comprise configuration section and Streaming Media processing section; Said Streaming Media processing section comprises network process module, audio/video decoding module, the image blend TV signal output module that connects successively, also is connected with the subtitle recognition module between said audio/video decoding module and the said image blend TV signal output module; Said subtitle recognition module comprises following processing procedure: whole two field picture caption area obtains, image sharpening, optical character identification, subtitling formatization, show with audio video synchronization; Said configuration section has increased the subtitle recognition switching function and captions are provided with form.
Further, said subtitle recognition module comprises following treatment step:
Step 1) is provided with timer;
Step 2) gets into next step behind the timer expiry;
Step 3) is obtained video cache district information, forms a two field picture;
Step 4) is carried out buffer memory according to being provided with the image appointed area;
Step 5) is carried out sharpening with cache image and is handled;
Step 6) is carried out optical character identification;
Step 7) is according to the formation captions are set;
Step 8) and video carry out mixed display;
Step 9) is returned step 2.
The invention has the beneficial effects as follows:
1, can carry out the software function expansion to the IPTV STB of any model, need not carry out hardware adjustment and can realize the subtitle recognition function;
2, through the captions in detection and the identification video signal; With the literal that identifies adopt again more clearly font, more strikingly color and more suitably size be presented on the screen; Do not influence simultaneously the image of other parts; Help the people of old or poor or weak eyesight to watch video greatly, also let twenty-twenty spectators browse captions simultaneously with more comfortable mode.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention, understands technological means of the present invention in order can more to know, and can implement according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. specify as after.Embodiment of the present invention is provided by following examples and accompanying drawing thereof in detail.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the modularization block diagram that the present invention realizes subtitle recognition and sharpening Presentation Function;
Fig. 2 is a nucleus module among the present invention---the software realization flow figure of optical character identification module.
Embodiment
Below with reference to accompanying drawing and combine embodiment, specify the present invention.
A kind of support video image is handled, and can carry out optical character identification to the captions of image appointed area, and the STB of sharpening demonstration; On the basis of common IPTV STB; Increase the function of optical character identification, and on the functional configuration interface, increase the part that to specify identified region, and increase the font that captions show again; Color, the setting of size etc.
The realization of IPTV STB framework substantially generally is divided into two major parts, the one, configuration section, the 2nd, Streaming Media processing section.Configuration section; Need in menu, comprise the option of launching and cancelling the subtitle recognition function, and can in displaying video, allow the user that caption area is selected; Also can adopt the mode of automatic identification selection; Simultaneously, also to comprise the page that font, color, size and the position that shows captions is provided with in the configuration, not illustrate here.
Optional expansion set-top box remote controller increases On/Off subtitle recognition function.
The expansion of Streaming Media processing section can be with reference to shown in Figure 1; The Streaming Media processing section generally comprises network processes (Streaming Media reception), audio/video decoding, image blend TV signal output modules such as (according to output interface, comprising digital signal and analog signal); For realizing function of the present invention; Needing increases the optical character identification module, and this module is between audio/video decoding module and the image blend output module, from the output buffers of decoder module, obtains image; Carry out optical character identification, mix as being shown to screen in the video image according to the mode that is provided with again.
The present realization of IPTV STB, is accomplished when os starting when device power starts generally all based on the embedded Linux development platform, and primary application program starts.When initialization, primary application program can be judged whether configuration parameter shows and open the subtitle recognition function, if then carry out the subtitle recognition program.The groundwork of subtitle recognition host process is to create a timer thread; Be used for subtitle recognition; Timer can be set according to captions empirical value switching time often, to avoid captions to lose (overlong time) or too to take processor resource (time is too short) as far as possible.
The software realization flow of said subtitle recognition inside modules is as shown in Figure 2; When (subtitle recognition is set to start) or user open subtitle recognition when system start-up; The subtitle recognition program can be performed; The groundwork of subtitle recognition host process is to create a timer thread, is used for subtitle recognition.When timer expiry, the design of time out program is following:
1, obtains a two field picture from the video cache district, need to prove,,, can adopt the mode transmission of video information of difference under a lot of situation according to distinguishing less experience between the video consecutive frame in order to save the consumption of video resource to the network bandwidth.General be embodied as the image A that periodically transmits a whole frame, between the cycle, then only transmit the difference part of this two field picture and image A.In this situation, then need do some and handle image information (also can accomplish) by decoder module to get access to a whole frame;
Specify the regional buffer memory that obtains captions in the whole two field picture that 2, will obtain, can adopt the mode of two-dimensional array to safeguard, supply subsequent treatment;
3, since the quality problems of video own or image itself to the interference of captions; Can cause the accuracy rate of optical character identification to reduce; So before discerning, need sharpening to handle, the effect of sharpening is exactly the difference of background around outstanding character is followed, and the algorithm of sharpening is very ripe;
4, carry out optical character identification, with the character buffer memory that identification obtains, the algorithm of realization can be with reference to present open source software FreeOCR etc., also can adopt ripe business software;
5, font, color, the size according to the caption character that is provided with forms new captions image, and mixes with video image according to the position, is shown to screen.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. STB with subtitle recognition and sharpening Presentation Function; Comprise configuration section and Streaming Media processing section; Said Streaming Media processing section comprises network process module, audio/video decoding module, the image blend TV signal output module that connects successively, it is characterized in that: also be connected with the subtitle recognition module between said audio/video decoding module and the said image blend TV signal output module; Said subtitle recognition module comprises following processing procedure: whole two field picture caption area obtains, image sharpening, optical character identification, subtitling formatization, show with audio video synchronization; Said configuration section has increased the subtitle recognition switching function and captions are provided with form.
2. the STB with subtitle recognition and sharpening Presentation Function according to claim 1 is characterized in that, said subtitle recognition module comprises following treatment step:
Step 1) is provided with timer;
Step 2) gets into next step behind the timer expiry;
Step 3) is obtained video cache district information, forms a two field picture;
Step 4) is carried out buffer memory according to being provided with the image appointed area;
Step 5) is carried out sharpening with cache image and is handled;
Step 6) is carried out optical character identification;
Step 7) is according to the formation captions are set;
Step 8) and video carry out mixed display;
Step 9) is returned step 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100723887A CN102625181A (en) | 2012-03-19 | 2012-03-19 | Set top box with caption recognition and definition display functions |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100723887A CN102625181A (en) | 2012-03-19 | 2012-03-19 | Set top box with caption recognition and definition display functions |
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| CN102625181A true CN102625181A (en) | 2012-08-01 |
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| CN2012100723887A Pending CN102625181A (en) | 2012-03-19 | 2012-03-19 | Set top box with caption recognition and definition display functions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106791493A (en) * | 2016-11-17 | 2017-05-31 | 天津大学 | Color coordination solid subtitle fabricating method based on fuzzy control |
| CN107846622A (en) * | 2017-10-27 | 2018-03-27 | 北京雷石天地电子技术有限公司 | A kind of method and device for detecting captions definition |
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| CN106791493A (en) * | 2016-11-17 | 2017-05-31 | 天津大学 | Color coordination solid subtitle fabricating method based on fuzzy control |
| CN107846622A (en) * | 2017-10-27 | 2018-03-27 | 北京雷石天地电子技术有限公司 | A kind of method and device for detecting captions definition |
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Application publication date: 20120801 |