Speech enhancement and coding in harsh acoustic noise environments

Author

Collura, J.S.

Author_Institution

Nat. Security Agency, Ft. Meade, MD

fYear

1999

fDate

1999

Firstpage

162

Lastpage

164

Abstract

Recent advances in speech enhancement and noise pre-processing algorithms have dramatically improved the quality and intelligibility of speech signals, both in the presence of acoustic noise as well as in benign environments. The use of speech enhancement in combination with voice coding algorithms and applied to governmental wireless communications systems is an important application area. This paper will first introduce one such system, the 2.4 kbps US Government Military Standard mixed excitation linear prediction (MELP) speech coding algorithm coupled with a speech enhancement algorithm developed by AT&T Research Labs. Next, the paper presents a discussion of the test conditions and results, and provide an interpretation of these results. Finally, a general discussion of related issues and conclusions is presented

Keywords

acoustic noise; linear predictive coding; speech coding; speech enhancement; speech intelligibility; 2.4 kbit/s; AT&T Research Labs; MELP speech coding algorithm; US Government Military Standard; governmental wireless communications systems; harsh acoustic noise environments; mixed excitation linear prediction; noise pre-processing algorithms; speech coding; speech enhancement; speech intelligibility; speech quality; voice coding algorithms; Acoustic noise; Acoustic testing; Degradation; Helicopters; Hidden Markov models; Loudspeakers; Noise generators; Signal generators; Speech enhancement; Working environment noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Speech Coding Proceedings, 1999 IEEE Workshop on

Conference_Location

Porvoo

Print_ISBN

0-7803-5651-9

Type

conf

DOI

10.1109/SCFT.1999.781518

Filename

781518