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   -> Volume 7, Issue 3


Preprint: Optimal ON filter banks for multiple description coding
 
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Xuguang Yang (yangx@ifp.uiuc.edu)
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PostPosted: Thu Mar 12, 1998 3:13 am    
Subject: Preprint: Optimal ON filter banks for multiple description coding
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#6 Preprint: Optimal ON filter banks for multiple description coding

Dear Waveleters,

We would like to inform you the availability of a preprint of our
recent work on multiple description coding using orthonormal filter
banks. It is going to be presented at CISS-98 (princeton), and a
submission to IEEE Trans. on Signal Processing is in preparation.

Title: Redundancy rate-distortion optimal orthonormal filter banks for
multiple description coding

Authors: Xuguang Yang and Kannan Ramchandran

Abstract: Multiple description coding refers to encoding an
information source into multiple bitstreams, in a way that various
levels of tradeoff between decoding quality and channel protection can
be supported. This paper addresses the design of two-channel
orthonormal filter banks to optimize the redundancy rate-distortion
performance of multiple description subband coding. The problem is
formulated in a Lagrangian optimization framework, and is solved
directly in the frequency domain to produce the optimal filter
responses. By varying the Lagrangian parameter, our design obtains all
points on the information redundancy rate-distortion curve for
Gaussian wide sense stationary input processes. Application of the
proposed algorithm to the popular AR(1) model yields very interesting
and insightful results. Comparisons with popularly deployed filter
banks reveal large gaps from the theoretical performance bound.

http: //www.ifp.uiuc.edu/~yangx/research
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