Image analysis – Image compression or coding – Lossless compression
Reexamination Certificate
2011-03-22
2011-03-22
Chen, Wenpeng (Department: 2624)
Image analysis
Image compression or coding
Lossless compression
C382S245000
Reexamination Certificate
active
07912306
ABSTRACT:
Coding quantized transform coefficients as occur in image compression combines a position identifying method to identify the relative position of clusters of consecutive non-zero-valued coefficients, an amplitude event identifying method to identify amplitude events in the clusters of non-zero-valued coefficients, and a coding method to code the position events, amplitude events, and signs of the amplitudes in the clusters. The method is particularly applicable to a series of quantized transform coefficients where clusters are likely to occur.
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Chen Wen-Hsiung
Pelton Gregory D.
Rosenfeld Dov
Toebes John A.
Wu Fang
Chen Wenpeng
Cisco Technology Inc.
Inventek
Rosenfeld Dov
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