CN101562712A - Method for realizing interception playing of digital TV network video self-adaptive window - Google Patents

Abstract

The invention relates to a method for realizing interception playing of a digital TV network video self-adaptive window, which comprises the following steps: (1) determining whether an current acquired input image is a network video in a 4:3 display format according to a DTV system, and reading resolution information of an current input video; (2) reading pixel information of current DTV output; (3) converting the pixel information into a YUV image space, caching a Y luminance information matrix, and reading resolution information of a current output video; (4) statistically analyzing the black frame edge position according to the Y luminance information matrix and a set black level luminance threshold, and judging whether a current image is an image source required to be cut; (5) retreating from a processing module if the current image is not required to be cut, or calculating the frame position in an input source according to the resolution information of an input image, the resolution information of an output target and the black frame edge position obtained by analysis in the Y luminance matrix; and (6) outputting the interception window position in the optimum input source. The method has obvious effect.

Description

Realize the method that the digital TV network video self-adaptive window intercepting is play

Technical field

The present invention relates to the method that digital TV network video is play, particularly a kind of method that realizes that the digital TV network video self-adaptive window intercepting is play.

Background technology

At present, the Digital Television of selling on the market when processing and playing network video, directly will be presented on the LCD screen after the network video stream decoding of input often.The Internet video form of input varies.Digital Television generally is the video mode according to input, as the image size, is 4: 3 display modes or 16: 9 display modes, and the output mode that then image is amplified to LCD shows.The best output of current LCD is generally overall height 1080P, and the Internet video pattern is varied, and 16: 9 original image display mode is changed into 4: 3 pattern often, or 4: 3 mode switch is 16: 9 display modes; What this display mode was described is the space vertical-horizontal proportion of image.Internet video is widely used in Digital Television, and the current network video format is inconsistent; The video of uploading may be that 4: 3 display modes are cut into 16: 9 patterns, also has 16: 9 video to upload as 4: 3 pattern; When Digital Television normally shows, can zoom to full screen display then with the digital video information that has the black sideband as effective information; On the actual displayed effect, significantly black surround can appear, and it is full frame that the real image viewing area does not reach, and will directly influence the view reception effect of Digital Television.

Summary of the invention

The objective of the invention is to overcome above-mentioned weak point,, design and develop the problem that runs in the process, a kind of method that realizes that the digital TV network video self-adaptive window intercepting is play is provided at Digital Television based on investigation to the current network video resource.

Implementation of the present invention is as follows for achieving the above object:

A kind of method that realizes that the digital TV network video self-adaptive window intercepting is play is characterized in that implementation step is as follows:

(1) confirms to obtain whether current input image is the Internet video of 4: 3 display modes according to digital television system; Read the resolution information of current input video;

(2) read the Pixel Information that current DTV exports;

(3), be converted to the YUV image space with the Pixel Information that reads; Buffer memory Y monochrome information matrix; Read the resolution information of current output video;

(4) according to the black level luminance threshold of Y monochrome information matrix and setting, statistical analysis black surround edge is along the position; Judge whether present image is the image source that needs cutting;

(5) if present image does not need cutting, then withdraw from processing module; If present image is the image that needs cutting, then according to the resolution information of input picture and the target resolution information of output, and the black surround edge that analysis obtains in the Y luminance matrix calculates the bezel locations in the input source along the position;

(6) intercepting the window's position in the input source that output is best.

The invention has the beneficial effects as follows: when in Digital Television, playing, according to the image statistics information of network video stream, according to the optimal proportion of 4: 3 or 16: 9, the effective viewing area information in the optimized display of video streams at network video stream.The present invention is based on the driving interface that existing hardware provides, obtain the monochrome information of output image; By the statistical picture monochrome information, judge the position and the space proportion information in actual content viewable zone of the Internet video information of current input, revise the clipping region of current video input, make that visual video area is maximized to show; Can allow the user when watching Internet video, can obtain best visual effect.Because the driving interface that this invention is based on current most of digital television chip to be provided realizes, does not need extra hardware cost; And the versatility compatibility is very good.The present invention is amplified to the viewing area Free Region output of whole screen by black surround regional location about the statistics video analysis.The inventive method is implemented simple, and effect is remarkable.

Description of drawings

Fig. 1 is the classification schematic diagram of Internet video code stream;

Among the figure: white space is actual content viewable information, and the grid identification division is the image black surround;

Category-A is: 4: 3 space proportions, and category-B is: 16: 9 space proportions,

The C class is: In was 16: 9 in 4: 3, and the D class is: in was 4: 3 in 16: 9.

Fig. 2 is the actual effect of Digital Television when showing D class Internet video;

Fig. 3 is a self-adapting window intercept method schematic diagram of the present invention;

Fig. 4 is the black surround frame position analysis schematic diagram in the output Y matrix;

Fig. 5 is the best intercepting the window's position schematic diagram that calculates in the input video source.

Embodiment

Below in conjunction with accompanying drawing and preferred embodiment, to according to embodiment provided by the invention, details are as follows for feature:

Referring to Fig. 3-Fig. 5, a kind of method that realizes that the digital TV network video self-adaptive window intercepting is play is characterized in that implementation step is as follows:

(1) obtains according to Digital Television (DTV) system validation whether current input image is the Internet video of 4: 3 display modes; Read resolution (Resolution) information of current input video.

(2) read the Pixel Information that current DTV exports.

(3), be converted to the YUV image space with the Pixel Information that reads; Buffer memory Y monochrome information matrix; Read resolution (Resolution) information of current output video; The YUV image space, be to each pixel by Y (brightness), two aberration spatial components of U and V are represented.

(4) according to the black level luminance threshold of Y monochrome information matrix and setting, statistical analysis black surround edge is along the position; Judge whether present image is the image source (type) that needs cutting.

(5) if present image does not need cutting, then withdraw from processing module; If present image is the image that needs cutting, then according to resolution (Resolution) information of input picture and target resolution (Resolution) information of output, and the black surround edge that analysis obtains in the Y luminance matrix calculates the bezel locations in the input source along the position.

(6) intercepting the window's position in the input source that output is best.

Specify:

Network video stream can be divided into following four classes according to the space proportion and the video flowing ground space proportion of actual content, four kinds of forms that promptly show among Fig. 1; For first three class A, B, C class, Digital Television all can normally show.But for the D class form of more existence in the current network video, Digital Television will be amplified demonstration according to the mode of Fig. 2.

Can see among Fig. 2 that for D class network video image, the viewing area is not amplified at utmost, user's visual sense is, the entire image black frame that has been wrapped outward one, and the real image district is too small, and do not see Chu.Actual viewing area area has only 56.25% of screen area, finds that by factual survey most of network video source is the D class.

When the incoming video signal source is the Internet video type, if present image is form when input of 4: 3, and self-adapting window intercepting function is under the enabled state, by reading the Pixel Information of continuous multiple image, the brightness amplitude matrix of computed image, based on empirical value, optimal judgement present image bezel locations.According to the black surround frame position of output image, the black surround frame position in the backwards calculation input source.To incoming video signal, adjust signal intercepting zone, the cutting of black surround frame information is removed, after convergent-divergent and post processing of image, adjusted image with best appreciation effect is presented on the screen.

The present invention uses said method just and accurately detects position, viewing area in the Internet video automatically in the location, content viewable is amplified to the best size of LCD.

The running environment that realizes the inventive method is TV, and to relate to programming language be (C ⁺⁺) language and C language, vision signal statistical technique, border Technology of Judgment, video image zooming technology.

The detailed description that the above-mentioned method of this realization digital TV network video self-adaptive window intercepting being play with reference to embodiment is carried out; be illustrative rather than determinate; therefore in the variation and the modification that do not break away under the general plotting of the present invention, should belong within protection scope of the present invention.

Claims (1)

1, a kind of method that realizes that the digital TV network video self-adaptive window intercepting is play is characterized in that implementation step is as follows:

(1) confirms to obtain whether current input image is the Internet video of 4: 3 display modes according to digital television system; Read the resolution information of current input video;

(2) read the Pixel Information that current DTV exports;

(3), be converted to the YUV image space with the Pixel Information that reads; Buffer memory Y monochrome information matrix; Read the resolution information of current output video;

(4) according to the black level luminance threshold of Y monochrome information matrix and setting, statistical analysis black surround edge is along the position; Judge whether present image is the image source that needs cutting;

(5) if present image does not need cutting, then withdraw from processing module; If present image is the image that needs cutting, then according to the resolution information of input picture and the target resolution information of output, and the black surround edge that analysis obtains in the Y luminance matrix calculates the bezel locations in the input source along the position;

(6) intercepting the window's position in the input source that output is best.

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