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1. (WO2017177957) NON-LOCAL ADAPTIVE LOOP FILTER

Pub. No.:    WO/2017/177957    International Application No.:    PCT/CN2017/080518
Publication Date: Fri Oct 20 01:59:59 CEST 2017 International Filing Date: Sat Apr 15 01:59:59 CEST 2017
IPC: H04N 19/82
H04N 19/50
Applicants: MEDIATEK INC.
Inventors: CHEN, Ching-Yeh
LIN, Jian-Liang
CHUANG, Tzu-Der
HUANG, Yu-Wen
Title: NON-LOCAL ADAPTIVE LOOP FILTER
Abstract:
Aspects of the disclosure provide a method for denoising a reconstructed picture. The method can include receiving reconstructed video data corresponding to a picture, dividing the picture into current patches, forming patch groups each including a current patch and a number of reference patches that are similar to the current patch, denoising the patch groups to modify pixel values of the patch groups to create a filtered picture, and generating a reference picture based on the filtered picture for encoding or decoding a picture. The operation of denoising the patch groups includes deriving a variance of compression noise in the respective patch group based on a compression noise model. A selection of model parameters is determined based on coding unit level information.