Design of asymmetric tree-structured multiple description sourcecodes

摘要

Multiple description coding aims at transmitting two mutuallyrefinable descriptions of a source on two different channels. Multipledescription coding is successfully applied to transmission of multimediasignals on diversity systems or packet-switched networks. We presentsimple algorithms for the design of multiply descriptive tree-structuredvector quantizers with linear encoding complexity. These algorithmsallow for both the rates and distortion constraints in a natural way andare shown to yield quantizers that are competitive with full-searchcodes in terms of rate-distortion performance