Efficient use of keyframes in video compression

Details Efficient use of keyframes in video compression Efficient use of keyframes in video compression

2008-07-24

2009-12-22

Werner, Brian P (Department: 2624)

Image analysis

Image compression or coding

Predictive coding

C386S349000, C386S349000

Reexamination Certificate

active

07636482

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.

REFERENCES:
patent: 2002/0071485 (2002-06-01), Caglar et al.

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