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A method of video macro block pattern encoding

A coding method and mode technology, applied in the field of video macroblock mode coding, can solve problems such as insufficient consideration

Active Publication Date: 2007-07-18
HUAWEI TECH CO LTD
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  • Abstract
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  • Application Information

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For other transformations, it is not fully considered

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  • A method of video macro block pattern encoding

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Embodiment Construction

[0043] The specific implementation manners of the present invention will be described below in conjunction with each other.

[0044] The invention provides a CBP-to-Codenum mapping method based on UVLC coding, which is suitable for video compression methods based on 8*8 or 4*4 transformation. Among them, the value of the macroblock mode coding CBP XXXXXX (543210) is a 6-bit non-negative integer, which is calculated according to the arrangement order of the 8×8 blocks in the 16×16 macroblock shown in Figure 2, and the upper two bits correspond to the chroma block, the lower four bits correspond to the luma block. If the nth bit is 1, it means that the 8×8 block corresponding to this bit has at least one non-zero DCT transform coefficient; if the nth bit is 0, it means that all DCT transform coefficients of the 8×8 block corresponding to this bit are all zero.

[0045] Two CBP to Codenum mapping methods are given below

[0046] Table 3 Mapping relationship between CBP and Cod...

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Abstract

A method of video macro block pattern encoding, the coded block pattern (CBP) comprises 6 digits of nonnegative integers, the two high digits corresponding to the luminance, and the four low digits corresponding to the chrome. The character is that dividing the video image into plural blocks and determining the transforming mode from CBP to code number. The transforming mode includes the corresponding relation among the code numbers, intra code mode and inter code mode. According to that relation, the coded block pattern (CBP) is performed. This invention maps the video block pattern encoding CBP into Codenum depending on the universal variable length code (UVLC). Since the conclusion is drawn on the characters of some typical video sequences of the CBP, fit can represent a good statistic characters and have a nice encoding quality.

Description

technical field [0001] The invention relates to the field of multimedia communication, in particular to a video macroblock mode encoding method. technical background [0002] The existing video image compression standards MPEG-1, MPEG-2, MPEG-4, H.261, H.263, and H.264 are all based on DCT transformation, among which H.264 and MPEG-4 AVC use performance The general processing framework of the integer transformation method approaching DCT is shown in Figure 1. [0003] The entropy coding methods mainly include variable-length coding and arithmetic coding methods. For example, in H.264, there are three kinds of entropy coding methods: universal variable-length coding method UVLC, context-based variable-length coding method CAVLC and context-based arithmetic coding method CABAC. [0004] The UVLC entropy coding method adopted by H.264 is Exp-Golomb entropy coding method [1] , the basic idea is: use "1" as the identifier, and the number of "0" in front of "1" is the same as t...

Claims

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Application Information

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IPC IPC(8): H04N7/30H04N7/26H04N7/50
CPCH04N19/00781H04N19/00121H04N7/26106H04N19/00278H04N19/00551H04N19/00369H04N19/13H04N19/176H04N19/196H04N19/463H04N19/61
Inventor 熊联欢
Owner HUAWEI TECH CO LTD
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