Joint design of channel-optimized multistage vector quantizer

Author

Krishnan, Venkatesh ; Anderson, David V.

Author_Institution

Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA

Volume

11

Issue

1

fYear

2004

Firstpage

5

Lastpage

7

Abstract

A novel channel-optimized multistage vector quantization (COMSVQ) codec is presented in which the stage codebooks are jointly designed. The proposed codec uses a signal source and channel-dependent distortion measure to encode line spectral frequencies derived from segments of a speech signal. Simulation results are provided to demonstrate the consistent reduction in the spectral distortion obtained using the proposed codec as compared to the conventional sequentially designed channel-matched multistage vector quantizer.

Keywords

combined source-channel coding; distortion; spectral analysis; speech codecs; speech coding; vector quantisation; channel-dependent distortion measure; channel-matched multistage vector quantizer; channel-optimized multistage vector quantization; joint source-channel coding; line spectral frequencies; signal source; spectral distortion; speech codec; speech coding; speech signal; stage codebooks; Algorithm design and analysis; Communication channels; Decoding; Distortion measurement; Frequency measurement; Helium; Signal design; Speech codecs; Speech coding; Vector quantization;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2003.819355

Filename

1255910