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Context-based adaptive binary arithmetic coding (cabac) decoding apparatus and decoding method thereof

A decoding device and arithmetic coding technology, applied in the field of decoding devices

Active Publication Date: 2009-10-21
REALTEK SEMICON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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The storage module is used to store these content variables

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  • Context-based adaptive binary arithmetic coding (cabac) decoding apparatus and decoding method thereof
  • Context-based adaptive binary arithmetic coding (cabac) decoding apparatus and decoding method thereof
  • Context-based adaptive binary arithmetic coding (cabac) decoding apparatus and decoding method thereof

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Embodiment Construction

[0016] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the accompanying drawings.

[0017] First, see figure 1 , figure 1 As a preferred embodiment of the CABAC decoding device 100 of the present invention, the CABAC decoding device 100 includes an initialization module 41, a storage module 42, an arithmetic decoding module 43 and an update module 44, and its coupling relationship is as follows figure 1 shown. The initialization module 41 is used to initialize multiple content variables. The storage module 42 is used for storing these content variables. The arithmetic decoding module 43 is used to perform arithmetic decoding on a syntax element (in this preferred embodiment, perform binary arithmetic decoding) according to the content variable in the storage module 42, and output a decoded syntax element; for example, wh...

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Abstract

The present invention relates to a context-based adaptive binary arithmetic coding (CABAC) decoding apparatus and a decoding method thereof. The decoding method is adapted to be implemented using a Context-based Adaptive Binary Arithmetic Coding (CABAC) decoding apparatus, and includes: initializing a plurality of context variables; storing the context variables; performing arithmetic decoding ofa syntax element according to the context variables so as to output a decoded syntax element and an update signal; and updating at least one of the context variables according to the update signal. Atleast one of the context variables is pre-initialized in the initializing step before a bit stream ready.

Description

technical field [0001] The present invention relates to a decoding device, in particular to a Context-based Adaptive Binary Arithmetic Coding (CABAC) decoding device and a decoding method thereof. Background technique [0002] H.264 / AVC is a video compression standard developed in recent years, which uses some advanced coding techniques to provide etc.) more excellent compression performance. [0003] In H.264 / AVC, a Context-based Adaptive Variable Length Coding (Context-based Adaptive Variable Length Coding, hereinafter referred to as CAVLC) technology or a CABAC technology is used for entropy coding to improve its coding efficiency. Among them, the CABAC technology is about 10% higher in coding efficiency than the CAVLC technology, but the computational complexity of its coding / decoding is also relatively high. In the decoding process of CABAC, the input bit string must at least go through the initialization step and the arithmetic decoding step to complete the decoding ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M7/40H04N7/26H04N7/30H04N7/50
CPCH03M7/4006
Inventor 谢兆安蔡志宏庄凯文
Owner REALTEK SEMICON CORP