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Complexity reduction of significance map coding

An efficient, encoder technology, applied in the field of video coding

Active Publication Date: 2013-12-18
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The result is the following complexity: two 15-element mapping tables are used to determine the proximity increment, and branches based on luma / chroma decisions are required to determine the 4×4, 8×8 and 16×16 / Neighborhood Increment in 32×32 Significance Graph Coding

Method used

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  • Complexity reduction of significance map coding
  • Complexity reduction of significance map coding
  • Complexity reduction of significance map coding

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Embodiment Construction

[0016] Video compression is used to send and receive digital video information more efficiently. Video compression employs various techniques to reduce or remove redundant data in video sequences. In High Efficiency Video Coding (HEVC), video frames are divided into coding units (CUs). A CU can be subdivided into smaller blocks for prediction or transform. Each CU can be further divided into prediction units (PUs) and transform units (TUs).

[0017] A CU typically has a luma component labeled Y and two chrominance components labeled U and V.

[0018] A prediction block for a data block is derived for encoding the data block. A predicted block can be derived by intra (I) prediction (eg spatial prediction) or inter (P or B) prediction (eg temporal prediction). The difference between the block of original video data and its prediction block is determined by identifying the prediction block. This difference is called prediction residual data and specifies the difference betwe...

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Abstract

The complexity of coding a significant_coeff_flag in video coding such as High Efficiency Video Coding (HEVC) is able to be reduced using the same mapping to select luma and chroma contexts for the coding of 4 x 4 significant maps. As a result, a 15 element lookup table and multiple branches are able to be removed to select the context index, and WD text is also simplified.

Description

[0001] Cross References to Related Applications [0002] This application is required under Title 35, U.S.C., Section 119(e) of Application No. 61 / 589,183 filed January 20, 2012 and titled "COMPLEXITY REDUCTION OF SIGNIFICANCE MAP CODING" )” which is hereby incorporated by reference in its entirety for all purposes. technical field [0003] The present invention relates to the field of video coding. More specifically, the present invention relates to complexity reduction for video coding. Background technique [0004] To encode the significant_coeff_flag (significant coefficient flag), the following methods have been used: position-based 4×4 encoding method, in which 9 contexts are used for luma and 6 contexts are used for chrominance; position-based 8×8 encoding method using 11 neighborhoods for luma and 11 neighborhoods for chroma; and a mask-based 16×16 / 32×32 encoding method using 7 neighborhoods for Luma and uses 4-segment proximity for chroma. [0005] Such as figu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26
CPCH04N19/463H04N19/91H04N19/176H04N19/186H04N19/70H04N19/46
Inventor C·奥耶恩
Owner SONY CORP