Author
Sriram, Parthasarathy, 1967-Issue Date
1990Advisor
Marcellin, Michael W.
Metadata
Show full item recordPublisher
The University of Arizona.Rights
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.Abstract
Low delay speech coding at 16 kbits/sec has received a tremendous amount of attention. One recently proposed scheme that offers excellent performance with buffering delays less than 5 msec is Trellis Coded Quantization (TCQ). The primary objective of this thesis is to evaluate the performance of TCQ in the presence of channel errors. When feedback-free encoding circuits are employed, error propagation is not a serious problem. For encoding sampled speech, segmental signal-to-noise ratios in excess of 20 dB are obtained. Performance comparisons are made using a fixed predictor and four different adaptive predictors for both error-free and noisy channels. Informal listening tests reveal that the reconstructed speech is of "near toll quality" and is almost indistinguishable from the original speech.Type
textThesis-Reproduction (electronic)
Degree Name
M.S.Degree Level
mastersDegree Program
Graduate CollegeElectrical and Computer Engineering