UEP of progressive images in wireless channels

Document Type

Conference Proceeding

Publication Date

12-1-2000

Abstract

We present a general optimization method of rate allocation for embedded image sources over fading channels under unequal error protection (UEP). 2-state Markov chain or Gilbert-Elliott (G-E) channel models are exploited to approximate slowly fading channels in wireless communications in which each state corresponds to a binary symmetric channel (BSC). Under the assumption that exact knowledge of channel state information (CSI) is not available, the partition of the bit stream, the allocation of source/channel coding rate, and the number of protection levels for UEP schemes are all optimized by using the statistics of the G-E models and maximization of the expected error-free source bit stream length. Experiment results lead to different rate allocation strategies from previous ones in some channel conditions and the performance improvement is up to 0.4 dB.

Identifier

0034497106 (Scopus)

Publication Title

IEEE Vehicular Technology Conference

ISSN

07400551

First Page

479

Last Page

483

Issue

52 ND

Volume

2

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