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Universal entropy decoding method and device for video decoder

A video decoder and entropy decoding technology, applied in the field of multimedia digital signal processing, can solve the problems of not being able to adapt to video codec counting, variable length entropy decoding, etc., and achieve the effect of improving efficiency and simplifying internal interfaces

Inactive Publication Date: 2008-09-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

The limitation of this patent is that it can only perform variable-length entropy decoding, and cannot adapt to the latest video codec counts, such as context-based arithmetic coding technology, etc.

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  • Universal entropy decoding method and device for video decoder

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Embodiment Construction

[0025] The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: this embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following the described embodiment.

[0026] This embodiment is based on the H.264 standard reference profile (MAIN PROFILE).

[0027] Such as figure 1 As shown, this embodiment provides a general entropy decoding method in video decoding, including the following steps:

[0028] Step 1, input a section of video bit stream, and decide which entropy decoding mode to apply to it according to the video compression standard followed by the bit stream. In this embodiment, the entropy decoding mode is arithmetic decoding, and context parameters are obtained at the same time;

[0029] The entropy decoding mode ...

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Abstract

The invention discloses a universal entropy decoding method and a universal entropy decoding device for a video decoder, belonging to the field of multimedia digital signal processing. The entropy decoding method recombines video decoding calculation into bit decoding, syntactic element decoding and entropy decoding control three parts, in accordance with the similarity relation between entropy decodings in video decoding. The entropy decoding device in the video decoder comprises a bit decoding module, a syntactic element decoding module, a control module, and a memory. In the method, calculation in each step has similar calculating granularity and data local characteristic, which is helpful to distributing calculating resources reasonably, simplifying the internal interfaces of the universal entropy decoding device in the video decoder, and improving the entropy decoding efficiency in video decoding.

Description

technical field [0001] The invention relates to a method and device in the field of multimedia digital signal processing, in particular to a general entropy decoding method and device for a video decoder. Background technique [0002] At present, the latest video codec technology includes MPEG-x series, H.26x series and China's AVS standard, among which entropy coding technology adopts variable length coding technology and context-based adaptive variable length coding technology (CAVLC: Context- based Adaptive Variable Length Coding) and context-based arithmetic coding technology (CABAC: Context-based Adaptive Binary Arithmetic Coding), thus achieving a high data compression rate. [0003] After searching the literature of the prior art, it is found that the patent number is 200410093097.1, and the patent name is "Single Clock Cycle Variable Length Entropy Decoding Device". In this patent, the codewords read from the outside are first sent to the FIFO buffer for buffering. ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26H04N7/50H03M7/30H03M7/40H04N19/13H04N19/184H04N19/42H04N19/44H04N19/70
Inventor 由宗远洪宇周大江刘佩林
Owner SHANGHAI JIAO TONG UNIV
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