Patent · US Active

Performing chroma deblocking for blocks which use joint chroma coding

US11317091B2 · kind B2 · utility

8Cited by

3References

27Claims

0Family size

Assignee

Huawei Technologies Co., Ltd. · CN

Inventors

Anand Meher Kotra · Munich, DE
Elena Alshina · Munich, DE
Semih Esenlik · Munich, DE
Biao Wang · Lo Wu, CN
Han Gao · San Diego, US
Roman Igorevich Chernyak · Moscow, RU

Key dates

Filing date	May 13, 2021
Grant date	Apr 26, 2022
Priority date	—
Expiry date	May 13, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH04N19/86
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method for deblocking a chroma block edge between a first chroma block of a first image block and a second chroma block of a second image block. The method includes a decision process which includes: determining a first chroma quantization parameter for the first chroma block based on a first luma quantization parameter of a first luma block of the first image block and a chroma QP mapping table for the first chroma block; determining a second chroma quantization parameter for the second chroma block based on a second luma quantization parameter of a second luma block of the second image block and a chroma QP mapping table for the second chroma block; determining an averaged and rounded chroma quantization parameter based on the first chroma quantization parameter and the second chroma quantization parameter; and determining a threshold parameter based on the averaged and rounded chroma quantization parameter.

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