Patent · US Active

Adaptive loop filtering for chroma components

US9807403B2 · kind B2 · utility

27Cited by

0References

46Claims

0Family size

Assignee

QUALCOMM Incorporated · US

Inventors

In Suk Chong · San Diego, US
Xianglin Wang · Santa Ana, US
Marta Karczewicz · San Diego, US

Key dates

Filing date	Oct 17, 2012
Grant date	Oct 31, 2017
Priority date	—
Expiry date	Jan 16, 2036

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/82
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

This disclosure proposes techniques to allow more flexibility in filtering chroma components in the adaptive loop filter. In one example, a method for adaptive loop filtering includes performing luma adaptive loop filtering based for luma components of a block of pixels, and performing chroma adaptive loop filtering for chroma components of the block of pixels, wherein filter coefficients for both the luma adaptive loop filtering and chroma adaptive loop filtering are derived from a block-based mode or a region-based mode. The method may further include determining to perform luma adaptive loop filtering on the block of pixels, and determining to perform chroma adaptive loop filtering on the block of pixels, wherein the determining to perform chroma adaptive loop filtering is performed independently of determining to perform luma adaptive loop filtering.

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