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Method and apparatus for image encoding/decoding

a technology of image encoding and decoding, applied in the direction of electrical apparatus, digital video signal modification, pictoral communication, etc., can solve the problem that the speed at which the bandwidth of a channel has developed cannot follow the quantity of multimedia data which has rapidly increased

Pending Publication Date: 2022-04-14
IND ACAD COOP GRP OF SEJONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present patent proposes an image encoding / decoding method and device that can improve prediction efficiency by effectively deriving motion information from a current block. The method suggests using a plurality of candidates for inter prediction, including spatial, temporal, and reconstructed information-based candidates. The motion information stored in a buffer can be added to the candidate list in a specific order, and the buffer can be initialized in a unit of a coding tree unit, a CTU row, a slice, or a picture. The method can generate a candidate list of a current block and perform inter prediction of the current block by using any one of a plurality of candidates. The plurality of candidates can include a temporal candidate in a unit of a sub-block. The method can effectively improve prediction efficiency and enhance video quality.

Problems solved by technology

But, a speed at which bandwidth of a channel has developed cannot follow the quantity of multimedia data which has rapidly increased.

Method used

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  • Method and apparatus for image encoding/decoding
  • Method and apparatus for image encoding/decoding
  • Method and apparatus for image encoding/decoding

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Experimental program
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embodiment 1

[0211]In step S903, a temporal candidate in a unit of a sub-block is added. But, when a temporal candidate in a unit of a sub-block is added in an AMVP candidate list, only candidate motion information of one arbitrary sub-block should be used as a predictor according to the above-described method of deriving a motion vector of an AMVP mode, but in some cases, candidate motion information of two or more sub-blocks may be used as a predictor. The contents of this step will be described in detail in the following

embodiment 2

[0212]In step S904, a History-based candidate is added. The contents of this step will be described in detail in the following

embodiment 3

[0213]In step S905, an average candidate between candidate motion information of a merge / AMVP list is added. The contents of this step will be described in detail in the following

[0214]After step S905, when candidate motion information of a Merge / AMVP list does not reach the maximum number, this flow chart is finished after the maximum number is filled by adding zero motion information in step S906 and a candidate motion information list for each mode is configured. Candidate motion information described in this embodiment may be utilized in a variety of prediction modes except for a Merge / AMVP mode. In addition, in FIG. 9, a candidate list does not limit an order of added candidates. For example, a temporal candidate in a unit of a sub-block may be added to a candidate list in preference to a spatial candidate. Alternatively, an average candidate may be added to a candidate list in preference to a History-based candidate. In this specification, a candidate motion information list, ...

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Abstract

A method and an apparatus for image encoding / decoding, according to the present invention, may generate a candidate list of a current block and perform inter-prediction of the current block by using any one of a plurality of candidates belonging to the candidate list. Here, the plurality of candidates comprise at least one from among a spatial candidate, a temporal candidate, and a restoration information-based candidate, and the restoration information-based candidate may be added from a buffer which stores motion information decoded prior to the current block.

Description

TECHNICAL FIELD[0001]The present disclosure relates to an image encoding / decoding method and device.BACKGROUND ART[0002]Recently, a demand for multimedia data such as a video has rapidly increased on the Internet. But, a speed at which bandwidth of a channel has developed cannot follow the quantity of multimedia data which has rapidly increased. Accordingly, VCEG (Video Coding Expert Group) of ITU-T, the International Standard Organization, and MPEG (Moving Picture Expert Group) of ISO / IEC enacted HEVC (High Efficiency Video Coding) version 1, a video compression standard, on February 2014.[0003]HEVC defines technologies such as intra prediction, inter prediction, transform, quantization, entropy encoding and an in-loop filter, etc.DISCLOSURETechnical Problem[0004]The present disclosure is to suggest a method in which prediction efficiency may be improved by effectively deriving motion information used in generating a MERGE / AMVP candidate list.[0005]The present disclosure is to prov...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): H04N19/105H04N19/137H04N19/159H04N19/176
CPCH04N19/105H04N19/176H04N19/159H04N19/137H04N19/52
Inventor MOON, JOO HEEWON, DONG JAEHA, JAE MIN
Owner IND ACAD COOP GRP OF SEJONG UNIV