Method and device for selecting irregular dividing video coding mode

A coding mode and video coding technology, which is applied in the field of video coding, can solve the problems of serious overcompression, reduce the subjective and objective efficiency of video coding, and the edges of objects are not smooth, so as to achieve smooth edges of image objects, improve subjective effects, and improve overcompression The effect of the phenomenon

Inactive Publication Date: 2011-07-27
深圳市云宙多媒体技术有限公司
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  • Application Information

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Problems solved by technology

[0003] The purpose of the embodiment of the present invention is to propose a video coding mode selection method and device suitable for irregular division, aiming to solve the serious overcompression p

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  • Method and device for selecting irregular dividing video coding mode
  • Method and device for selecting irregular dividing video coding mode

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Embodiment 1

[0042] Embodiment 1, the present invention provides a method for selecting an irregularly divided video coding mode: see figure 1 , the specific method of this embodiment is:

[0043] Step 101: Presetting the first to tenth block division coding modes;

[0044] The first to tenth block division coding modes are respectively:

[0045] see figure 2 , the coding mode of the first block division is to connect the middle point of the leftmost first column of the macroblock and the upper right corner of the macroblock to form a diagonal line, and the macroblock is divided into two parts by this diagonal line;

[0046] see image 3 , the second block division coding mode is to connect the upper left corner of the macroblock and the middle point of the first rightmost column of the macroblock to form a diagonal line, and the macroblock is divided into two parts by this diagonal line;

[0047] see Figure 4 , the third block division coding mode is to connect the middle point of ...

Embodiment 2

[0082] Embodiment 2. Compared with Embodiment 1, the present invention also provides an irregularly divided video coding mode selection device, which includes a preset unit, a gradient information acquisition unit, a first judgment unit, and a second judgment unit , optimal mode determination unit;

[0083] a preset unit, configured to preset the first to tenth block division coding modes;

[0084] a gradient information acquisition unit, configured to use an edge extraction operator to extract the edge of the image in the current macroblock, and acquire gradient information of the image data in the current macroblock according to the edge of the image;

[0085] a first judging unit, configured to set the binarization result of the image data according to the gradient information;

[0086] The second judging unit is used to select the block division coding mode of the current macroblock according to the binarization result of the image data of the current macroblock;

[0087...

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Abstract

The invention relates to a method for selecting irregular dividing video coding modes, comprising the following steps: presetting a first to tenth block dividing coding modes; extracting the edge of an image in the current macro block by utilizing an edge extracting operator, and acquiring gradient information of image data in the current macro block according to the edge of the image; setting binarization result of the image data according to the gradient information; selecting a block dividing coding mode for the current macro block according to the binarization result of the image data of the current macro block; and outputting the block dividing coding mode of the current macro block and the conventional rectangular block dividing mode into a coder mode selection module, and selecting an optimal block dividing coding mode of the current macro block. By applying the method provided by the invention, overcompression of the edge of an object in the coded image can be effectively avoided, the edge of the object in the coded image is smoother, and the subjective effect of the coding is effective enhanced.

Description

technical field [0001] The present invention relates to the field of video coding, in particular to a video coding mode selection method and device suitable for irregular division. Background technique [0002] In the field of video coding, block division is an important part of video coding. New video coding technologies in the prior art, such as H264, all adopt a tree-based block division method, that is, a macroblock is finely divided into multiple rectangular blocks. Although this block division method has greatly improved the coding efficiency compared with the old video coding standard h263, this rectangular regular block division method cannot well represent the irregular geometric characteristics of objects in the image. According to the block division method in the prior art, a large number of bits are needed to encode the edge of the object in the video image, which causes the over-compression phenomenon of the edge of the object in the encoded image to be more se...

Claims

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Application Information

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IPC IPC(8): H04N7/26
CPCH04N7/26063H04N19/00072H04N19/00157H04N7/26127H04N19/119H04N19/14
Inventor 徐苏珊
Owner 深圳市云宙多媒体技术有限公司
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