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Rate adjustable speech coding by lattice quantization

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3 Author(s)
Norden, F. ; Dept. of Inf. Theor., Chalmers Univ. of Technol., Goteborg, Sweden ; Shabestary, T.Z. ; Hedelin, Per

We address speech coding architectures, suited for channels such as packetized networks. We adopt the analysis-by-synthesis paradigm. To achieve operability at a continuum of rates, all explicit perceptual filtering in the codebook search is eliminated, and quantization is performed with lattice quantizers. In this particular implementation, rate-distortion performance is improved by entropy coding of the lattice indices. The result is a competitive coder applicable to both speech and music, where subjective as well as objective performance scales well with the rate of the coder.

Published in:

Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on  (Volume:2 )

Date of Conference:

6-10 April 2003