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|Title:||Estimating unreliable packets in subband coded speech|
|Authors:||Wong, W.C. |
|Source:||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|
|Appears in Collections:||Staff Publications|
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