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Variable-length code decoding method based on zero-prefix code

A decoding method and prefix code technology, applied in television, electrical components, digital video signal modification, etc., can solve the problems of low efficiency of processing methods, unsuitable for application of real-time encoding and decoding systems, etc., to reduce access, improve processing speed, The effect of improving decoding efficiency

Inactive Publication Date: 2007-08-22
TSINGHUA UNIV
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Problems solved by technology

This processing method is inefficient and not suitable for application in real-time codec systems

Method used

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  • Variable-length code decoding method based on zero-prefix code
  • Variable-length code decoding method based on zero-prefix code

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Embodiment Construction

[0029] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] The variable-length code decoding method based on the zero-prefix code proposed by the present invention is characterized in that the method includes: generating multiple multi-fork trees based on the zero-prefix code, and performing variable-length code decoding on the code stream according to the multi-fork tree; wherein , the structure of the multi-fork tree based on the 0-prefix code includes: a 0-prefix codeword bit sequence composed of a root node and its multi-level nodes, and the lower-level nodes are the child nodes of its upper-level nodes; wherein, the root node only records its child nodes In addition to recording the number of child nodes, other nodes at all levels also record the bits of the codeword sequence, and the bits recorded by the child nodes are the bits recorded by their superior nodes and subsequent bits , each node has...

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Abstract

A method for decoding variable length code based on zero prefix code includes generating a numbers of multiple fork trees based on zero prefix code and then carrying out variable length code decoding on code stream according to generated multiple fork tree. The structure of said multiple fork tree is also disclosed.

Description

technical field [0001] The invention belongs to the technical field of digital video coding and decoding, and in particular relates to a decoding method by quickly referring to a CAVLC table specified in the H.264 / AVC standard. Background technique [0002] H.264 / AVC is a new generation digital video coding standard, which is jointly developed by the Joint Development Team (JVT) composed of the International Telecommunications Union (ITU) and the MPEG standard organization ISO. As a video technology standard, H.264 / AVC can be adapted to various fields of video applications, including low bit rate wireless applications, network video applications, high-definition TV broadcast applications and DVD applications. [0003] H.264 / AVC is similar to the previous coding standards H.263 and MPEG-4, both of which adopt the hybrid coding mode based on predictive transformation, and absorb the advantages of the previous standards at the same time. Compared with H.263, MPEG-4 in coding pe...

Claims

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Application Information

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IPC IPC(8): H04N7/30H04N7/26H04N19/91
Inventor 戴琼海施一平尔桂花
Owner TSINGHUA UNIV
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