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Method for encoding/decoding video signal and device therefor

Pending Publication Date: 2022-01-13
XRIS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent aims to improve encoding and decoding efficiency in video compression by using various methods such as determining the partitioning type of a coding block based on chroma block size, obtaining a prediction sample by using a block vector, and adaptively determining whether a bidirectional optical flow is applied. These methods can lead to increased efficiency in video compression and better video quality.

Problems solved by technology

The biggest problem with high-definition video service is that an amount of data is greatly increased.
However, with rapid development of high-definition video services, the performance of HEVC is gradually showing 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

[0058]Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0059]Image encoding and decoding is performed on a basis of a block. In an example, for a coding block, a transform block, or a prediction block, encoding / decoding processes such as transform, quantization, prediction, in-loop filtering, reconstruction, etc. may be performed.

[0060]Hereinafter, an encoding / decoding target block is referred to as a “current block”. In an example, a current block may represent a coding block, a transform block, or a prediction block according to a current process of encoding / decoding.

[0061]In addition, the term “unit” used in the present specification represents a basis unit for performing a specific encoding / decoding process, and a “block” may be understood to represent a sample array having a predetermined size. Unless otherwise stated, “block” and “unit” may be used interchangeably. In an example, in examples described la...

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PUM

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Abstract

A video decoding method, according to the present invention, comprises the steps of: 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

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit under 35 U.S.C. section 371, of PCT International Application No.: PCT / KR2020 / 005902, filed on May 4, 2020, which claims foreign priority to Korean Patent Application No.: 10-2019-0051234, filed on May 2, 2019, Korean Patent Application No.: 10-2019-0051890, filed on May 2, 2019, and Korean Patent Application No.: 10-2019-0069017, filed on Jun. 11, 2019, in the Korean Intellectual Property Office, the disclosures of which are hereby incorporated by reference in their entireties.FIELD OF THE DISCLOSURE[0002]The present disclosure relates to a video signal encoding / decoding method and a device therefor.DESCRIPTION OF THE RELATED ART[0003]As display panels become larger, video service of higher quality is required. The biggest problem with high-definition video service is that an amount of data is greatly increased. In order to solve the above problem, research for improving the video compression rate is b...

Claims

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Application Information

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IPC IPC(8): H04N19/513H04N19/132H04N19/105H04N19/159H04N19/176
CPCH04N19/513H04N19/132H04N19/176H04N19/159H04N19/105H04N19/119H04N19/60H04N19/186H04N19/593H04N19/122H04N19/157H04N19/11
Inventor LEE, BAE KEUN
Owner XRIS CORP