Speech compression by vector quantization of epochs

Author

Veprek, Peter ; Bradley, Alan B.

Author_Institution

Dept. of Commun. & Electron. Eng., RMIT Univ., Melbourne, Vic., Australia

Volume

1

fYear

1999

fDate

1999

Firstpage

491

Abstract

A pitch epoch is a fundamental unit of voiced speech. This paper introduces a speech compression method based on vector quantization of epochs. Pitch determination, epoch marking, vector quantization procedure, and a technique for epoch extrapolation are described. The compression method is then evaluated and briefly compared to other waveform coders. The quality is objectively measured by the segmental signal-to-noise ratio and the results are tabulated. The (automatic) epoch vector quantization yields the following SNRseg: 10.03 dB at 12.0 kbps, 11.35 dB at 21.3 kbps, 13.31 dB at 39.7 kbps, 18.32 dB at 76.4 kbps, and 62.69 dB at 112.9 kbps

Keywords

extrapolation; speech coding; vector quantisation; 112.9 kbit/s; 12 kbit/s; 21.3 kbit/s; 39.7 kbit/s; 76.4 kbit/s; VQ; epoch extrapolation; epoch marking; objective quality; pitch determination; pitch epoch; segmental signal-to-noise ratio; speech compression; vector quantization; voiced speech; waveform coders; Extrapolation; Frequency; Humans; Signal analysis; Signal to noise ratio; Speech analysis; Speech synthesis; Time domain analysis; Vector quantization; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing and Its Applications, 1999. ISSPA '99. Proceedings of the Fifth International Symposium on

Conference_Location

Brisbane, Qld.

Print_ISBN

1-86435-451-8

Type

conf

DOI

10.1109/ISSPA.1999.818220

Filename

818220