Optimal overcomplete subband expansions for multiple description coding
Sanjeev Mehrotra · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2000
We study the use of overcomplete subband expansions for multiple description coding. The system proposed uses an overcomplete subband expansion followed by independent coding of each of the subbands. The entire coding of each of the subbands is entirely contained within a single description. Using analysis in the polyphase domain, we study finding frequency response of optimal filterbanks and the rate allocation across the subbands to minimize the end- to-end reconstruction error subject to a transmission rate constraint when a distribution over channel states is known. A general analysis of the problem is given and results are shown for a 3 by 2 expansion of a first-order autoregressive process.