Patent · US Active

Block-based adaptive loop filter (ALF) design and signaling

US11451773B2 · kind B2 · utility

0Cited by

8References

36Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

Marta Karczewicz · San Diego, US
Akshay Gadde · Fremont, US
Vadim Seregin · San Diego, US
Wei-Jung Chien · San Diego, US

Key dates

Filing date	May 30, 2019
Grant date	Sep 20, 2022
Priority date	—
Expiry date	May 30, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/172
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A video encoder and video decoder may determine a set of adaptive loop filters, from among a plurality of sets of adaptive loop filters, on a per-block basis. Each set of adaptive loop filters may include filters from a previous picture, filters signaled for the current picture, and/or pre-trained filter. By varying the set of adaptive loop filters on a per-block basis, the adaptive loop filters available for each block of video data may be more adapted to local statistics of the video data.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.