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H.264/AVC standard-based intra-frame prediction mode selection method

A technology of intra-frame prediction mode and prediction mode, which is applied in the direction of TV, electrical components, digital video signal modification, etc., can solve the problems of inability to make correct judgments, increase the amount of calculation, poor performance, etc., and achieve easy, fast and parallel implementation , the effect of increasing speed

Inactive Publication Date: 2012-10-17
XIDIAN UNIV
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Problems solved by technology

However, for images with irregular texture details, it cannot make correct judgments, but it will increase the amount of calculation and poor performance.

Method used

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  • H.264/AVC standard-based intra-frame prediction mode selection method

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[0038] The present invention is an improvement to the intra-frame prediction mode selection technology in the existing H.264 / AVC standard, which can not only improve the intra-frame mode selection speed in the H.264 / AVC standard, but also make the intra-frame Mode selection is easier to implement in parallel in hardware.

[0039] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0040] refer to figure 1 , the present invention realizes the steps of the intra prediction mode selection method based on the H.264 / AVC standard as follows:

[0041] Step 1, input an image macroblock with a size of 16×16, and divide the macroblock into three sub-blocks of different sizes, that is, 4 sub-blocks with a size of 8×8 and 16 sub-blocks with a size of 4×4 block and 1 subblock of size 16×16.

[0042] In step 2, for sub-blocks with a size of 8×8 and 4×4, perform step 3, and for sub-blocks with a size of 16×16, perform st...

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Abstract

The invention discloses an H.264 / AVC standard-based intra-frame prediction mode selection method which mainly solves the problems of complex intra-frame mode selection and difficulty in realizing hardware in parallel of the traditional H.264 / AVC standard. The H.264 / AVC standard-based intra-frame prediction mode selection method comprises the steps of: firstly, carrying out primary selection on all prediction modes of a 4*4 subblock and a 8*8 subblock by using an SATD (Sum Of Absolute Transformed Difference) to obtain four candidate prediction modes; carrying out rate distortion optimization (RDO) on the four candidate modes to select an optimal prediction mode; then replacing DCT with KL transformation during transformation; and finally, carrying out code rate estimation by using CAVLC (Context-based Adaptive Variable Length Coding) instead of CABAC (Context-Based Adaptive Binary Arithmetic Coding). According to the invention, the speed of intra-frame mode selection of the H.264 / AVC standard is increased, hardware is easily realized rapidly and in parallel in the intra-frame mode selection of the H.264 / AVC standard, and the H.264 / AVC standard-based intra-frame prediction mode selection method can be used in an intra-frame prediction process in the H.264 / AVC standard.

Description

technical field [0001] The invention belongs to the technical field of digital signal processing, relates to a method for realizing image video compression coding, and can be used in the intra-frame prediction process of images in the H.264 / AVC standard. Background technique [0002] In December 2001, ITU-T, the International Telecommunication Union Standardization Organization for Telecommunications, the International Organization for Standardization and the International Electrotechnical Commission ISO / IEC established the Video Joint Working Group JVT, starting with H.26x, and committed to formulating the next generation of video coding standards. Together they developed the video processing coding standard H.264 / AVC, which was officially ratified in March 2003. In recent years, H.264 / AVC has been widely used. Although this standard has superior compression performance, its calculation complexity is very high. [0003] The video processing coding standard H.264 / AVC first ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/32H04N19/105H04N19/167H04N19/17H04N19/40
Inventor 李甫周蕾蕾石光明张犁樊春晓王晓甜杨海舟
Owner XIDIAN UNIV
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