Voice activity detector for microphone array processing in hand-free systems

Author

Krasny, Leonid ; Oraintara, Soontorn

Author_Institution

Dept. of Electr. Eng., Texas Univ., Arlington, TX, USA

fYear

2002

fDate

4-6 Aug. 2002

Firstpage

224

Lastpage

228

Abstract

This paper describes the use of voice activity detector (VAD) in microphone array processing for hand-free systems. Two different types of VAD are proposed using conventional and adaptive beamforming. Taking into account the fact that the speech signal is not present at all time in human conversations, both signal of interest and noise can be better estimated. Simulation results show that the VAD significantly improves the performance of the array processing algorithms. The performances of the two types of VAD are also compared in the paper.

Keywords

acoustic transducer arrays; array signal processing; microphones; mobile handsets; signal detection; speech processing; telephony; VAD; adaptive beamforming; array processing algorithms; hand-free systems; human conversations; microphone array processing; mobile telephones; noise estimation; signal of interest estimation; simulation results; speech signal; voice activity detector; Array signal processing; Detectors; Filters; Humans; Microphones; Noise reduction; Signal processing; Speech coding; Speech enhancement; Speech processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensor Array and Multichannel Signal Processing Workshop Proceedings, 2002

Print_ISBN

0-7803-7551-3

Type

conf

DOI

10.1109/SAM.2002.1191033

Filename

1191033