On optimal bit allocation for classification-based source-dependent transform coding

Authors:
David Akopian
Affiliations:
Department of Electrical and Computer Engineering, The University of Texas at San Antonio, San Antonio, TX
Venue:
Research Letters in Signal Processing
Year:
2008

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Abstract

An optimal bit allocation is presented for classification-based source-dependent transform coding. A vector of transform coefficients is considered to have been produced by a mixture of processes. The available bit resource is distributed optimally in two stages: (1) bit allocation is performed for each class of coefficient vectors, and (2) bit allocation is performed for each vector coefficient. The solution for low bit rates imposing nonnegative bit resource is also presented. The rate-distortion bound of the classification-based source coding is derived.