Methods and apparatus for efficient encoding of image edges,...

Details Methods and apparatus for efficient encoding of image edges,... Methods and apparatus for efficient encoding of image edges,...

2004-04-26

2011-12-27

Rao, Andy (Department: 2486)

Pulse or digital communications

Bandwidth reduction or expansion

Television or motion video signal

C375S240010

Reexamination Certificate

active

08085850

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.

REFERENCES:
patent: 6125201 (2000-09-01), Zador
patent: 6298167 (2001-10-01), Martucci et al.

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