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Transmissions over hybrid wireline-wireless networks suffer both packet losses and bit errors. To facilitate delay-sensitive audio/video communications over hybrid networks, low-delay error recovery techniques, such as forward error correction (FEC) and multiple description coding (MDC), are utilized to provide protection against bit errors and packet losses, respectively. As a means of joint source-channel...
We design a channel optimized vector quantizer (COVQ) for symbol-by-symbol maximum a posteriori (MAP) hard-decision demodulated channels. The main objective is to exploit the non-uniformity of the indices representing the quantized source via the MAP decoder and iteratively optimize the overall discrete channel (at the symbol level) jointly with the quantizer. We consider memoryless Gaussian and Gauss-Markov...
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