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Spectral entropy-activity classification in adaptive transform coding

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2 Author(s)
Mester, R. ; Robert Bosch GmbH, Hildesheim, Germany ; Franke, U.

A two-dimensional feature space for block classification which discriminates reliably between blocks that require very different processing is proposed. In combination with a block `activity' measurement, the introduced `spectral entropy' feature offers the possibility to stabilize the reconstruction quality of transform coding systems for each processed block on a high level. The classification is valid and useful for threshold-based and zonal coding schemes

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Selected Areas in Communications, IEEE Journal on  (Volume:10 ,  Issue: 5 )