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Information ontropy holding decoding method and device

A decoding method and information entropy technology, applied in the field of information entropy preserving decoding method and device, can solve problems such as improvement, redundancy, and non-utilization

Inactive Publication Date: 2006-01-11
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this approach is that it does not take advantage of X 1 、X 2 , while the control codeword is only used as a marker, and does not carry any information about X 1 or X 2 There is redundancy in the information, which is not conducive to the improvement of compression efficiency

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  • Information ontropy holding decoding method and device

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Embodiment 1

[0036] 1. A kind of information entropy keeps decoding method, comprises the following steps:

[0037] 1) input the code word extracted from the code stream into the table look-up device, look into the two-dimensional variable-length decoding table, if the code word matches {level=x in the code table n , run=y m} combination one-to-one correspondence, then decode {level=x n , run=y m}combination; if the input code word does not have a one-to-one corresponding signal combination in the two-dimensional variable-length decoding table {level=x n , run=y m}, the table look-up device outputs a specific control code word, and simultaneously the input code word and the next code word following it are input into the demultiplexing device, and the demultiplexing device outputs the input code word as the first composite signal and outputting the next codeword following it as a second composite signal;

[0038] 2) The decoding steps of the first composite signal and the second compos...

Embodiment 2

[0049] 1. A kind of information entropy keeps decoding method, comprises the following steps:

[0050] 1) input the code word extracted from the code stream into the table look-up device, look into the two-dimensional variable-length decoding table, if the code word matches {level=x in the code table n , run=y m} combination one-to-one correspondence, then decode {level=x n , run=y m} combination; if the input code word does not have a signal combination {level, run} corresponding to it in the two-dimensional variable-length decoding table, the table look-up device outputs a specific control code word, and simultaneously combines the input code word with the tight The following next codeword is input to the demultiplexing device, and the demultiplexing device outputs the input codeword as the first composite signal and outputs the next codeword immediately following it as the second composite signal;

[0051] 2) The decoding steps of the first composite signal and the secon...

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Abstract

An information entropy holding decoding method and device for image or video compression decode are disclosed. A 2D code list is looked up for the 2D combined information entropy holding length-variable decode to variables X1 ans X2. If there is a correspondant relation between the code extracted from code stream and the information group {X1=xn, X2=ym} in code list, it is decoded to obtain {X1=xn, X2=ym}. Otherwise, the code is the first synthetic signal and the next code is the second synthetic signal.

Description

technical field [0001] The invention relates to the technical field of electrical digital data processing, in particular to an information entropy preserving decoding method and device. Background technique [0002] for variable X 1 、X 2 The two-dimensional joint information entropy-preserving variable-length coding is often realized by looking up the two-dimensional code table. when variable X 1 、X 2 When the value range of is very large, if the information combination {X 1 、X 2 The one-to-one correspondence between} and the codeword will result in a very large two-dimensional code table, which is not conducive to storage and search. The usual method is, for the information combination {X 1 、X 2} use look-up table to implement encoding, and for {X with small probability of occurrence 1 、X 2} combination, first look up the table to obtain a control codeword. This control code word is only used to mark that the encoding of the event cannot be directly realized by l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/26H04N19/91
Inventor 虞露董洁楼剑
Owner HUAWEI TECH CO LTD