Patent · US Active

Deblocking filtering

US8526509B2 · kind B2 · utility

17Cited by

0References

24Claims

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	Oct 6, 2011
Grant date	Sep 3, 2013
Priority date	—
Expiry date	Oct 6, 2031

Classification

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

Abstract

Blocking artifacts at a block boundary (1) between a block (10) and a neighboring block (20) in a video frame are reduced by calculating an offset based on pixel values of pixels (11, 13) in a line (12) of pixels (11, 13, 15, 17) in the block (10) and based on pixel values of pixels (21, 23) in a corresponding line (22) of pixels (21, 23, 25, 27) in the neighboring block (20). The offset is added to the pixel value of the pixel (11) closest to the block boundary (1) in the line (12) of pixels (11, 13, 15, 17) and is subtracted from the pixel value of the pixel (21) closest to the block boundary (1) in the corresponding line (22) of pixels (21, 23, 25, 27). 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.