Efficient use of keyframes in video compression

Image analysis – Image compression or coding – Predictive coding

Reexamination Certificate

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C386S349000, C386S349000

Reexamination Certificate

active

07426306

ABSTRACT:
One embodiment disclosed relates to a method for encoding and decoding a video sequence in which a keyframe is used to bi-directionally predict frames in the sequence. The keyframe is coded independently of other frames in the sequence. Both a prior frame occurring before the keyframe and a subsequent frame occurring after the keyframe are predicted using data from the keyframe. Another embodiment disclosed relates to a method for allocating bits to a keyframe during video encoding. Effects of a plurality of keyframe bit allocations on quality of a predicted frame are measured. Said effects are used to determine a near optimal keyframe bit allocation.

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patent: 6940909 (2005-09-01), Linzer
patent: 2002/0071485 (2002-06-01), Caglar et al.
patent: 2004/0017851 (2004-01-01), Haskell et al.
patent: 2004/0042548 (2004-03-01), Yu et al.
patent: WO 00/77735 (2000-12-01), None

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