Comprehensive evaluation of theoretical approximations for spectral quantization performance

Author

Gardner, William R. ; Subramaniam, Anand D. ; Rao, Bhaskar D.

Author_Institution

QUALCOMM Inc., San Diego, CA, USA

fYear

2002

fDate

3-6 Sept. 2002

Firstpage

1

Lastpage

4

Abstract

In this work, recently derived theoretical approximations for high rate vector quantization (VQ) are reformulated to cleanly separate the effects of the VQ codevector density and the local Voronoi region shapes on overall VQ performance. Numerical evaluation of the resulting theoretical expressions is performed, which allows comparison of the relative importance of codevector density and Voronoi region shapes for a variety of different conditions. In particular, results are presented which compare root mean squared (RMS) vs. mean squared (MS) optimal quantizers, full band vs. partial band log spectral distortion (LSD) quantizers, LPC vs. K vs. LAR vs. ASIN vs. LSP vs. cepstral coefficients, 0th order vs. 1st order recursion, and optimal vs. weighted mean squared error (WMSE) vs. mean squared error (MSE) quantizers.

Keywords

approximation theory; computational geometry; mean square error methods; spectral analysis; vector quantisation; VQ codevector; band log spectral distortion quantizers; cepstral coefficients; high rate vector quantization; local Voronoi region shapes; mean squared optimal quantizers; root mean squared optimal quantizers; spectral quantization performance; theoretical approximation comprehensive evaluation; weighted mean squared error; Abstracts; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2002 11th European

Conference_Location

Toulouse

ISSN

2219-5491

Type

conf

Filename

7072187