FILTERING METHOD AND APPARATUS FOR IMPROVING PREDICTION IN IMAGE CODING SYSTEM

Title:

FILTERING METHOD AND APPARATUS FOR IMPROVING PREDICTION IN IMAGE CODING SYSTEM

Document Type and Number:

WIPO Patent Application WO/2017/065357

Kind Code:

A1

Abstract:

An inter prediction method according to the present invention, which is performed by a decoding apparatus, comprises the steps of: acquiring prediction-related information and residual information from a received bitstream; performing inter prediction on a current block on the basis of the prediction-related information so as to generate prediction samples; generating a list of Wiener filter candidates on the basis of spatially neighboring blocks of the current block, and deriving Wiener filter coefficients for the current block on the basis of candidate blocks in the list of the Wiener filter candidates; filtering the prediction samples on the basis of the derived Wiener filter coefficients; deriving residual samples for the current block on the basis of the residual information; and generating a reconstructed picture on the basis of the filtered prediction samples and the residual samples. The present invention can reduce the amount of data for a residual signal and improve coding efficiency.

Inventors:

KIM KYUWOON (KR)
LIM JAEHYUN (KR)
PARK NAERI (KR)
SEO JUNGDONG (KR)

Application Number:

PCT/KR2016/000788

Publication Date:

April 20, 2017

Filing Date:

January 25, 2016

Export Citation:

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Assignee:

LG ELECTRONICS INC (KR)

International Classes:

H04N19/105; H04N19/117; H04N19/503; H04N19/82

Foreign References:

KR20110066888A	2011-06-17
KR20130124539A	2013-11-14
KR20110093811A	2011-08-18
US20100254448A1	2010-10-07
US20120307898A1	2012-12-06

Other References: