Compensation of speaker directivity in speech recognition using HMM composition

Author

Giron, Frank ; Minami, Yasuhiro ; Tanaka, Masashi ; Furuya, Ken Ichi

Author_Institution

Speech & Acoust. Lab., NTT Human Interface Labs., Tokyo, Japan

Volume

1

fYear

1998

fDate

12-15 May 1998

Firstpage

253

Abstract

In hands-free speech recognition the speaker should be able to move freely in front of the speech acquisition device. However, the speech signal is then submitted to variations due to the continuous change of position in the acoustic space. This paper focuses on the role of speaker head rotations as compared with static situations in anechoic conditions. The effect of speaker directivity in speech recognition performance degradation is demonstrated and a compensation method based on HMM composition is proposed to increase the performance

Keywords

compensation; hidden Markov models; speech recognition; HMM composition; acoustic space; anechoic conditions; compensation method; hands-free speech recognition; performance degradation; speaker directivity; speaker head rotations; speech acquisition device; speech recognition; speech signal; Acoustic devices; Adaptive arrays; Degradation; Delay; Hidden Markov models; Humans; Laboratories; Loudspeakers; Microphone arrays; Speech recognition;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on

Conference_Location

Seattle, WA

ISSN

1520-6149

Print_ISBN

0-7803-4428-6

Type

conf

DOI

10.1109/ICASSP.1998.674415

Filename

674415