Video image intra-frame encoding unit texture analysis and encoding unit selection method

A video image and intra-frame coding technology, applied in the field of video coding, can solve the problems of increased coding time, increased coding complexity, and high complexity, and achieves the effects of small calculation amount, shortened coding time, and fast selection.

Active Publication Date: 2015-07-29
WUHAN LUOJIA WEIYE TECH CO LTD
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Problems solved by technology

Since the size of the initial block determined by the coding unit has a great influence on the one-step division of the subsequent prediction unit and transformation unit, compared to the coding unit size of 16×16, setting the coding unit size to 64×64 can reduce the bit rate by 12%. Compared with the H.264 standard, HEVC has more than doubled its compression efficiency, but its encoding complexity has increased by 2 to 4 times, and the corresponding encoding time has also increased. Based on this problem, HEVC itself has also provided several An algorithm about the selection mode of coding units, but the complexity is still high

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  • Video image intra-frame encoding unit texture analysis and encoding unit selection method
  • Video image intra-frame encoding unit texture analysis and encoding unit selection method

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[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0034] A method for performing texture analysis on an intra-coding unit of a video image, using a first texture complexity to perform texture analysis on an intra-coding unit of a video image, the first texture complexity being the local range of all pixels in a coding unit Variance of values, wherein the local range value refers to the difference between the maximum pixel value and the minimum pixel value within the local range of a pixel point, and the local range refers to other adjacent pixel points around the pixel point.

[0035] Such as figure 1 As shown in , (a) is a coding unit, for a pixel with a pixel value of 6 in (a), its local range includes pixel values ​​of 1, 2, 3, 5, 7, 9, 10 and 11 pixel, so its local range value is the difference between the maximum pixel...

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Abstract

The invention discloses a video image intra-frame encoding unit texture analysis and encoding unit selection method. The method includes performing texture analysis on video image intra-frame encoding units according to first texture complexities, and selecting the encoding unit by comparing the first texture complexities. The first texture complexities are of variances of local range values of all pixels of one encoding unit; the local range value is of the difference of a maximum pixel value and minimum pixel value of one pixel in a local range, and the local range is of pixels adjacent to the pixel. The method is simple and rapid to implement, and the encoding time is shortened greatly on the premise of guaranteeing the video image quality.

Description

technical field [0001] The invention relates to the field of video coding, in particular to a coding unit texture analysis and coding unit selection method in a video image frame. Background technique [0002] According to statistics, by 2017, 90% of network data will be video data, most of which will be high-definition video data. The latest video coding standard, HEVC, proposes many new features for efficient video compression. [0003] HEVC is similar to H.264 / AVC in that block-based prediction and compression is its foundation. Since the resolution of video has been increased to the physical resolution of 720p or even higher, the macroblock with a maximum value of 16×16 is not suitable for describing the characteristics of high-definition video, so HEVC proposes a wider block size. In HEVC, a coding tree unit is divided into coding units of various sizes, ranging from 8×8 to 64×64. Since the size of the initial block determined by the coding unit has a great influence...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/593H04N19/105H04N19/14
Inventor 彭凯冯文顺陈凯张先愉王学徐万彪李俊峰
Owner WUHAN LUOJIA WEIYE TECH CO LTD
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