Entropy decoding method and device used for decoding video estimation residual error coefficient

A prediction residual and entropy decoding technology, applied in the field of digital media processing, can solve problems such as unprovided technical solutions, and achieve the effect of improving the efficiency of encoding and decoding

Active Publication Date: 2008-05-07
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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Problems solved by technology

[0004] However, how to perform effective and accurate entropy decoding on the entropy coding method for vid

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  • Entropy decoding method and device used for decoding video estimation residual error coefficient
  • Entropy decoding method and device used for decoding video estimation residual error coefficient
  • Entropy decoding method and device used for decoding video estimation residual error coefficient

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Embodiment Construction

[0056] The entropy decoding method for video prediction residual coefficient decoding provided by the present invention is provided to match the Chinese patent No. ZL 03157189.1 "Entropy coding method for video prediction residual coefficient coding". After the video prediction residual decoding is performed on the macroblocks, the data obtained after entropy decoding are then inversely quantized and inversely transformed, so as to ensure the normal viewing of the user.

[0057] In order to better understand the entropy decoding method used for video prediction residual coefficient decoding provided by the present invention, it is first described through an encoding embodiment, see figure 1 and figure 2 , taking a 4*4 image block as an example.

[0058] In this coding scheme, in order to improve the coding efficiency, different types of code tables are established for different types, so that under each type, the codeword length of the coded symbols and the occurrence probab...

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Abstract

The present invention discloses an entropy decoding method used for the decoding of a video predictive residual coefficient. A decoding end reads the auxiliary information of the current macroblock, determines the types of the macroblock and image blocks and orderly executes all the nonzero image blocks of the current macroblock; according to the types of the macroblock and the current image block, a code table type used to decode the current image block is selected, the code table type of the current image block corresponds to multiple different code tables; the code tables are switched in turn in order to decode the Exp-Golomb code of the current image block and obtain each (level, run) coefficient pair of the current image block. The present invention also discloses an entropy decoding device used for the decoding of the video predictive residual coefficient, which includes a code stream receiving unit, a code table providing unit and a decoding unit. The method and the device disclosed by the present invention sufficiently consider the context environment and the statistic regularity of a video block residual coefficient, do not affect the realization of the complexity of computation and increase the effeciency of encoding and decoding.

Description

technical field [0001] The present invention relates to an image / video encoding and decoding technology, in particular to an entropy encoding method for encoding video prediction residual coefficients in image / video compression and digital audio and video encoding and decoding techniques. An entropy decoding method and an entropy decoding device for decoding video prediction residual coefficients belong to the technical field of digital media processing. Background technique [0002] Video codec technology is one of the key technologies for applications such as digital media storage and transmission. In order to achieve high-efficiency video coding and decoding, techniques such as intra-frame prediction, inter-frame prediction, transformation, quantization, and entropy coding are used in existing coding techniques, among which inter-frame prediction uses block-based motion vectors to eliminate redundancy between images , Intra prediction uses spatial prediction mode to elim...

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Application Information

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IPC IPC(8): H04N7/32H04N7/26H04N19/13H04N19/503
Inventor 高文赵德斌王强马思伟吕岩陈熙霖
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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