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Method and apparatus for context-adaptive binary arithmetic coding

An adaptive binary and arithmetic coding technology, applied in the field of image/video coding, can solve problems such as increasing compression capabilities

Active Publication Date: 2021-10-08
INTERDIGITAL CE PATENT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In other words, one of the challenges is to benefit from the increased compression capability provided by using an asymmetric splitting mode without increasing the number of contexts used by HEVC entropy coding (CABAC)

Method used

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  • Method and apparatus for context-adaptive binary arithmetic coding
  • Method and apparatus for context-adaptive binary arithmetic coding
  • Method and apparatus for context-adaptive binary arithmetic coding

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Embodiment Construction

[0100] The present principles will be described more fully hereinafter with reference to the accompanying drawings, examples of which are shown. The present principles may, however, be implemented in many alternative forms and should not be construed as limited to the examples set forth herein. Thus, while the present principles are susceptible to various modifications and alternative forms, specific examples thereof are shown by way of example in the drawings and will be described in detail herein. It should be understood, however, that there is no intent to limit the principles to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the principles as defined by the claims .

[0101] The terminology used herein is for the purpose of describing particular examples only and is not intended to be limiting of the present principles. As used herein, the singular for...

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Abstract

The present principle relates to a method device for context-adaptive binary arithmetic coding / decoding of a sequence of binary symbols representing syntax elements related to picture data belonging to a picture block. The method comprises, for each binary symbol of a sequence of binary symbols: - determining (110) a context depending on the size of the picture block and the binary symbol to be coded; and - performing arithmetic on said binary symbol taking into account said determined context Encoding / decoding (120); characterized in that the determining (110) context includes: - when the size of the picture block is a power of 2, determining (910) the context according to the size of the picture block; and - When the size of the picture block is not a power of two, the context is determined (920) from a block size immediately above or below the size of the picture block, the block size being equal to a power of two.

Description

technical field [0001] The present principles generally relate to picture / video coding. In particular, the technical field of the present principles relates to context-adaptive binary arithmetic coding of sequences of binary symbols representing syntax elements required to decode said picture data. Background technique [0002] This section is intended to introduce the reader to various aspects of technology, which may be related to various aspects of the present principles that are described and / or claimed below. It is believed that this discussion helps to provide the reader with background information to better understand various aspects of this principle. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art. [0003] In the following, the picture data contains one or several arrays of samples (pixel values) in a specific video format that specifies all information related to the pixel values ​​of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/13H04N19/91H04N19/157H04N19/18
CPCH04N19/13H04N19/91H04N19/157H04N19/18H04N19/122H04N19/176H04N19/70H04N19/147H04N19/172
Inventor F.莱利内克G.拉思F.厄本
Owner INTERDIGITAL CE PATENT HLDG