Hybrid digital-analog source-channel coding with one-to-three bandwidth expansion

We consider the problem of bandwidth expansion for lossy joint source-channel coding over a memoryless Gaussian channel. A low delay 1:3 bandwidth expansion hybrid digital-analog coding system, which combines a scalar quantizer and a 1:2 nonlinear analog coder, is proposed. It is shown that our prop...

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Bibliographic Details
Main Authors: Saleh, A A, Alajaji, F, Wai-Yip Chan
Format: Conference Proceeding
Language:English
Subjects:
Bandwidth
Channel coding
Decoding
Delay
Optimization
Quantization
Spirals
Online Access:Request full text
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Summary:We consider the problem of bandwidth expansion for lossy joint source-channel coding over a memoryless Gaussian channel. A low delay 1:3 bandwidth expansion hybrid digital-analog coding system, which combines a scalar quantizer and a 1:2 nonlinear analog coder, is proposed. It is shown that our proposed system outperforms the 1:3 generalized hybrid scalar quantizer linear coder in terms of signal-to-distortion ratio (SDR). A lower bound on the system SDR is also derived.
DOI:10.1109/CWIT.2011.5872126