Adaptive silence deletion for speech storage and voice mail applications

Author

Gan, Cheong K. ; Donaldson, Robert W.

Author_Institution

IBM Canada, Toronto, Ont., Canada

Volume

36

Issue

6

fYear

1988

fDate

6/1/1988 12:00:00 AM

Firstpage

924

Lastpage

927

Abstract

An algorithm that uses two adaptive-amplitude thresholds and zero-crossing rate was used to delete nonspeech material from speech waveforms which have been digitally encoded and then decoded using PCM, adaptive-differential PCM, and adaptive-delta-modulation. Typically, compression rates of 35% resulted. Subject evaluations are used to assess reconstructed speech quality, which improves significantly when absolute silence on playback is replaced with prerecorded background noise

Keywords

decoding; encoding; speech; speech analysis and processing; voice mail; PCM; absolute silence; adaptive silence deletion; adaptive-amplitude thresholds; adaptive-delta-modulation; adaptive-differential PCM; compression rates; nonspeech material; prerecorded background noise; reconstructed speech quality; speech storage; voice mail; zero-crossing rate; Algorithm design and analysis; Approximation algorithms; Interpolation; Material storage; Maximum likelihood estimation; Phase change materials; Signal processing algorithms; Speech processing; Time series analysis; Voice mail;

fLanguage

English

Journal_Title

Acoustics, Speech and Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

0096-3518

Type

jour

DOI

10.1109/29.1605

Filename

1605