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Method for encoding/decoding video signal and device therefor

An encoding method and encoding technology, which are applied in the directions of image communication, digital video signal modification, electrical components, etc., to achieve the effect of improving encoding/decoding efficiency

Pending Publication Date: 2021-07-23
XRIS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the rapid development of high-definition video services, the performance of HEVC gradually shows its limitations

Method used

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  • Method for encoding/decoding video signal and device therefor
  • Method for encoding/decoding video signal and device therefor
  • Method for encoding/decoding video signal and device therefor

Examples

Experimental program
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Embodiment Construction

[0060] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0061]Image encoding and decoding are performed on a block basis. In an example, encoding / decoding processes such as transformation, quantization, prediction, in-loop filtering, reconstruction, etc. may be performed on an encoded block, a transformed block, or a predicted block.

[0062] Hereinafter, the encoding / decoding target block is referred to as "current block". In an example, the current block may represent an encoded block, a transformed block, or a predicted block according to a current encoding / decoding process.

[0063] Also, the term 'unit' used in this specification indicates a basic unit for performing a specific encoding / decoding process, and 'block' may be understood as indicating a sample array having a predetermined size. Unless otherwise stated, "block" and "unit" are used interchangeably. In an example, a coding block and ...

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Abstract

A video decoding method, according to the present invention, comprises the steps: deriving an L0 motion vector and an L1 motion vector of a current block; deriving an L0 prediction sample and an L1 prediction sample for a first position inside the current block on the basis of the L0 motion vector and the L1 motion vector; determining whether to apply a bidirectional optical flow to the current block; deriving a refined motion vector for a subblock which comprises the first position, when it is determined to apply the bidirectional optical flow; deriving a refined prediction sample for the first position on the basis of the refined motion vector; and obtaining a prediction sample for the first position by using the L0 prediction sample, the L1 prediction sample, and the refined prediction sample.

Description

technical field [0001] The present disclosure relates to a video signal encoding / decoding method and device thereof. Background technique [0002] As display panels become larger, higher quality video services are required. The biggest problem with high-definition video services is the huge increase in data volume. In order to solve the above problems, researches on increasing the video compression rate are actively being conducted. As a representative example, the Joint Collaborative Team on Video Coding (JCT-VC) was established in 2009 by the Moving Picture Experts Group (MPEG) and the Video Coding Experts Group (VCEG) under the International Telecommunication Union Telecommunication Standardization Sector (ITU-T). JCT-VC proposed High Efficiency Video Coding (HEVC), which is a video compression standard with a compression performance approximately twice that of H.264 / AVC, and was approved as a standard on January 25, 2013. However, with the rapid development of high-de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/119H04N19/105H04N19/132H04N19/60H04N19/186H04N19/11H04N19/157H04N19/593H04N19/176H04N19/122
CPCH04N19/105H04N19/119H04N19/60H04N19/186H04N19/593H04N19/132H04N19/176H04N19/122H04N19/157H04N19/11H04N19/159H04N19/513
Inventor 李培根
Owner XRIS CORP
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