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Adaptive pre- and post-filtering for block based systems

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2 Author(s)
Gangaputra, Sachin ; Department of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, MD 21218, USA ; Tran, T.D.

This paper introduces an adaptive time-varying signal decomposition framework with perfect reconstruction via a combination of adaptive time-domain pre/post-processing and size-adaptive block DCTs. We explore different methods to produce time-varying basis functions and study various properties of the transition filter banks involved. Several criteria that could be used to select a certain set of basis functions are investigated. Promising coding gains over those of non-adaptive decompositions in an image coding setting are also presented.

Published in:

Acoustics, Speech, and Signal Processing (ICASSP), 2002 IEEE International Conference on  (Volume:4 )

Date of Conference:

13-17 May 2002