Enhanced speech activity detection for mobile telephony

Author

Hatamian, Shahin

Author_Institution

Wireless Inf. Networks Lab., Rutgers Univ., Piscataway, NJ, USA

fYear

1992

fDate

10-13 May 1992

Firstpage

159

Abstract

A speech activity detector (SAD) based on decision metrics generated in an adaptive differential pulse code modulation waveform coder is described. The detector functions accurately in low-SNR environments characteristic of cellular and personal communications. After nonspeech intervals are removed, the quality of the reconstructed speech is influenced by SAD decision errors and by the suppression of background noise in nonspeech intervals. The author examines subjectively the effect of the SAD on the perceived quality of the received speech

Keywords

cellular radio; personal communication networks; pulse-code modulation; radiotelephony; speech analysis and processing; adaptive differential pulse code modulation; background noise suppression; cellular communications; decision errors; decision metrics; low-SNR environments; mobile telephony; nonspeech intervals; personal communications; received speech; reconstructed speech quality; speech activity detector; waveform coder; Detectors; Interference; Modulation coding; Multiaccess communication; Pulse generation; Pulse modulation; Signal to noise ratio; Speech enhancement; Speech processing; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1992, IEEE 42nd

Conference_Location

Denver, CO

ISSN

1090-3038

Print_ISBN

0-7803-0673-2

Type

conf

DOI

10.1109/VETEC.1992.245449

Filename

245449