Adaptive filter to improve H-264 video quality

Details Adaptive filter to improve H-264 video quality Adaptive filter to improve H-264 video quality

2007-10-30

2007-10-30

Philippe, Gims (Department: 2621)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240120, C375S240240, C375S240250, C382S238000

Reexamination Certificate

active

10633273

ABSTRACT:
A method for reducing or eliminating coding artifacts in video pictures processed using intra block prediction methods, for example, according to the H.264 standard. The causes of the coding artifacts are identified to be the intra prediction modes with prediction directions that are not in the direction of the raster scan. Filtering the affected blocks with a simple one-dimensional spatial filter will reduce or even eliminate these coding artifacts.

REFERENCES:
patent: 7116830 (2006-10-01), Srinivasan
patent: 2003/0231795 (2003-12-01), Karczewicz
patent: 2005/0135484 (2005-06-01), Lee et al.
List et al., Adaptive Deblocking Filter, Jul. 2003, IEEE Transactions on circuits and systems for video technology, vol. 13 No. 7, pp. 614-619.
Thomas Wiegand, Gary Sullivan, Ajay Luthra; Draft ITU-T Recommendation and Final Draft International Standard of Joint Video Specification (ITU-T Rec. H.264|ISO/IEC 14496-10 AVC); Joint Video Team (JVT) of ISO/IEC MPEG & ITU-T VCEG, (ISO/IEC JTC1/SC29/WG11 and ITU-T SG16 Q.6); 8th Meeting; Geneva, Switzerland, May 23-27, 2003.

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