Intra-frame prediction block partition coding method and system

A technology of intra-frame prediction and encoding method, applied in the field of video encoding and decoding, which can solve problems such as huge amount of calculation

Inactive Publication Date: 2013-09-25
深圳市云宙多媒体技术有限公司
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Problems solved by technology

[0003] The purpose of the embodiments of the present invention is to propose an encoding method for intra-frame prediction block division, which aims to solve the conventional intra-frame prediction algorithm in the prior art, and the traversal operation on the encoding block division and prediction mode of macroblocks, although it can achieve Optimization of rate-distortion performance, but the problem of huge amount of calculation

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Embodiment 1

[0110] figure 1 It is a flowchart of an encoding method for intra-frame prediction block division in a preferred embodiment of the present invention; the method includes the following steps:

[0111] Step1: Calculate the first jump value of the horizontal pixel in the current coded macroblock.

[0112] diffh _ 1 = sum 1 ≤ i ≤ 8 ( y ( i , 9 ) - y ( i , 8 ) )

[0113] Among them, diffh_1 represents the first transition value of pixels in the horizontal direction in the current coded macroblock; Indicates the summation of all variables that meet the conditions; y(i,j) i...

Embodiment 2

[0160] figure 2 It is a structural diagram of an encoding system for intra-frame prediction block division in a preferred embodiment of the present invention; the system includes: a first coded macroblock transition value calculation and judgment module, a first intra-frame prediction module, a first judgment module, a second Two intra-frame prediction modules, the best intra-frame prediction mode acquisition module,

[0161] The jump value calculation and judgment module of the first coded macroblock is connected with the first intra prediction module and the first judgment module, and is used to calculate the horizontal and / or vertical jump value in the current coded macroblock, and according to the The jump value determines the intra prediction mode;

[0162] The first intra-frame prediction module is used to skip the 16×16 intra-frame prediction for the current coded macroblock, and directly perform 4×4 intra-frame prediction (that is, directly divide the current coded m...

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Abstract

The invention provides an intra-frame prediction block partition coding method and system. According to the method, through the analysis of jumping laws of subblock boundary pixels in a macroblock, block partition with small existing probabilities and corresponding prediction modes are deleted, and a fast coding method for block partition and prediction modes in intra-frame prediction is achieved; based on design characteristics of the jumping laws of the subblock boundary pixels, rate-distortion performance stability is achieved except that calculated amount is reduced and coding speed is improved.

Description

technical field [0001] The present invention relates to the field of video encoding and decoding, in particular to an encoding method and system for intra-frame prediction block division. Background technique [0002] Conventional intra-frame prediction algorithms encode macroblocks. Generally, 16×16 intra-frame prediction (4 prediction modes) is performed on the macroblock first, and then the macroblock is divided into 4×4 sub-blocks. For each sub-block Perform 4×4 intra-frame prediction (9 prediction modes), and finally perform RDO (Rate-Distortion Optimization, rate-distortion optimization) to obtain the best intra-frame prediction mode. Although the traversal operation on the block division and prediction mode can achieve the optimized implementation of the rate-distortion performance, the amount of calculation it brings is also huge. Contents of the invention [0003] The purpose of the embodiments of the present invention is to propose an encoding method for intra-f...

Claims

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Application Information

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IPC IPC(8): H04N7/32H04N7/26
Inventor 舒倩
Owner 深圳市云宙多媒体技术有限公司
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