Patent · US Active

Deblocking filtering

US9407912B2 · kind B2 · utility

3Cited by

1References

27Claims

0Family size

Assignee

Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

Andrey Norkin · Solna, SE
Kenneth Andersson · Gävle, SE
Rickard Sjöberg · Stockholm, SE

Key dates

Filing date	Jul 31, 2013
Grant date	Aug 2, 2016
Priority date	—
Expiry date	Nov 25, 2033

Classification

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

Abstract

Blocking artifacts at a block boundary between a block and a neighboring block in a video frame are reduced by calculating an offset based on pixel values of pixels in a line of pixels in the block and based on pixel values of pixels in a corresponding line of pixels in the neighboring block. The offset is added to the pixel value of the pixel closest to the block boundary in the line of pixels and is subtracted from the pixel value of the pixel closest to the block boundary in the corresponding line of pixels. The resulting deblocking filter has good low-pass characteristics and is efficient for reducing blocking artifact.

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