Method and apparatus for decoding encoded groups of pictures...

Details Method and apparatus for decoding encoded groups of pictures... Method and apparatus for decoding encoded groups of pictures...

2011-04-12

2011-04-12

Ustaris, Joseph G (Department: 2483)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240110, C375S240130, C375S240140, C375S240250, C375S240260

Reexamination Certificate

active

07924916

ABSTRACT:
MPEG video uses motion compensated prediction for coding pictures. A GOP includes at least one intra-coded picture to start decoding with and a number of inter-coded pictures and normally also includes bi-directionally predicted pictures. However, the GOP structure is not constructed for playing GOPs in backward direction in a trickplay mode across GOP boarders. The invention facilitates, for different GOP structures, a smooth backward video mode thereby reducing the required number of frame buffers and achieving near real-time speed presentation. In some embodiments some I and/or P pictures are decoded more than once. The invention also allows backwards decoding of MPEG-4-AVC GOPs including B-stored pictures.

REFERENCES:
patent: 5974224 (1999-10-01), Nagata
patent: 6353700 (2002-03-01), Zhou
patent: 6751400 (2004-06-01), Matsumura et al.
patent: 2003/0103566 (2003-06-01), Stenzel
patent: WO 03/046892 (2003-06-01), None
European Search Report.

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