Methods and apparatus for efficient encoding of image edges, motion, velocity, and detail
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United States of America Patent
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Dec 27, 2011
Grant Date -
Oct 28, 2004
app pub date -
Apr 26, 2004
filing date -
Apr 24, 2003
priority date (Note) -
Expired
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Abstract
A wavelet pyramid-based still-image and video compression apparatus uses line-vectors, context-dependent quantization thresholds, hierarchical tree-structured displacement coding, synchronous prediction, and conditional zerotree branch updates to improve intra- and inter-frame coding speed and efficiency, and to improve video stream noise resilience. The disclosed intra-frame coding methods can be used to improve the coding efficiency of wavelet-based still-image compression algorithms.
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