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Method, apparatus and system for encoding and decoding a subset of transform units of encoded video data

A technology of video data and units, applied in the direction of digital video signal modification, code conversion, electrical components, etc.

Active Publication Date: 2017-06-13
CANON KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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In this case, there is no further compression achievable

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  • Method, apparatus and system for encoding and decoding a subset of transform units of encoded video data
  • Method, apparatus and system for encoding and decoding a subset of transform units of encoded video data
  • Method, apparatus and system for encoding and decoding a subset of transform units of encoded video data

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Embodiment Construction

[0108] Where steps and / or features are referenced in any one or more figures with the same reference numeral, such steps and / or features have the same function or operation for the purposes of this description unless an intention to the contrary appears.

[0109] The property of low-frequency information dominating the upper left corner of the two-dimensional array of residual coefficients can be exploited by a binarization scheme to minimize the size of the residual coefficients in the bitstream.

[0110] One aspect of binarization is the selection of contexts for encoding the syntax elements corresponding to the respective tokens. A flag can use more than one context. A particular example of determining which context should be used for a flag relies on other already available information and is known as "context modeling". Context modeling is the process of selecting the context that most accurately represents the statistical properties of the current instance of the marker...

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Abstract

The invention proivdes a method, apparatus and system for encoding and decoding a subset of transform units of encoded video data. Method of decoding a transform unit (e.g., 400) of encoded video data using Golomb-Rice decoding is disclosed. Significant residual coefficients for a sub-set of the transform unit are determined. A predetermined Rice parameter for Golomb-Rice decoding of the subset of the transform unit is selected. The predetermined Rice parameter being offset from a zero setting when the determined number of significant residual coefficients is higher than a predetermined threshold. The subset of the transform unit is decoded using the predetermined Rice parameter as an initial parameter for the Golomb Rice decoding.

Description

technical field [0001] The present invention relates generally to digital video signal processing, and more particularly to methods, devices and systems for encoding and decoding subsets of transform units of video data. Background technique [0002] There are currently many applications for video encoding including applications for transmitting and storing video data. A number of video coding standards have also been developed and others are currently under development. Recent advances in video coding standardization have led to the formation of a group known as the "Joint Experts Team on Video Coding" (JCT-VC). The Joint Expert Team on Video Coding (JCT-VC) includes Study Group 16, Question 6 (SG16 / Q6), and members of ISO / IEC Joint Technical Committee 1 / Subcommittee 29 / Working Group 11 (ISO / IEC JTC1 / SC29 / WG11), also known as the Motion Picture Experts Group (MPEG). [0003] The goal of the Joint Expert Team on Video Coding (JCT-VC) is to produce a new video coding stan...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/13H04N19/61H04N19/14H04N19/18H03M7/40
CPCH04N19/13H04N19/14H04N19/18H04N19/61H03M7/4075H04N19/124H04N19/91H04N19/60
Inventor 沃洛迪米尔·科勒斯尼科夫
Owner CANON KK