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Title: Estimating unreliable packets in subband coded speech
Authors: Wong, W.C. 
Seshadri, N.
Sundberg, C.-E.W.
Issue Date: 1990
Citation: Wong, W.C.,Seshadri, N.,Sundberg, C.-E.W. (1990). Estimating unreliable packets in subband coded speech. IEEE Global Telecommunications Conference and Exhibition 3 : 1979-1983. ScholarBank@NUS Repository.
Abstract: A robust digital mobile radio communication system using 12-kb/s embedded subband speech coding and rate-compatible punctured convolutional (RCPC) codes with generalized Viterbi decoding for combined error detection and correction is examined. Unreliable subband-coded speech side-information is identified and replaced using various estimation strategies. By using a realistic simulation model with 4-DPSK (differential phase-shift keying) modulation over a mobile channel, improvements of 1 to 4.4 dB in recovered speech segmental SNR (signal-to-noise ratio) are obtained compared to a system with only channel-based error correction. Informal subjective tests support these gains.
Source Title: IEEE Global Telecommunications Conference and Exhibition
ISBN: 0879426322
Appears in Collections:Staff Publications

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