Extended amplitude coding for clustered transform coefficients

Details Extended amplitude coding for clustered transform coefficients Extended amplitude coding for clustered transform coefficients

2005-11-09

2009-11-17

Chen, Wenpeng (Department: 2624)

Image analysis

Image compression or coding

Lossless compression

Reexamination Certificate

active

07620258

ABSTRACT:
Coding quantized transform coefficients as occur in image compression combines a position coding method to code the position of clusters of consecutive non-zero-valued coefficients with an amplitude coding method to code the amplitudes of a concatenation of a plurality of the clusters. The amplitude coding method exploits that runs of amplitude 1 coefficients are more likely in the clusters than runs of other coefficient amplitudes.

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