A multipulse excited pole-zero filtering approach for speech enhancement

Author

Hsueh, A-Chuan ; Chuang, C.K.

Author_Institution

GTE Lab. Inc., Waltham, MA, USA

fYear

1988

fDate

11-14 Apr 1988

Firstpage

545

Abstract

The use of a pole-zero filter and multipulse excitation is proposed to enhance a noisy voiced speech segment. The excitation signal is regarded as the sum of two components: a unipolar periodic impulse train and a randomly distributed bipolar pulse sequence (usually of much smaller amplitude). The periodic impulse train is extracted to estimate the pole-zero filter without any phase constraint, while the small secondary pulses are added to reduce the reconstruction error as desired. it is shown that this procedure offers an efficient modeling scheme in high SNR conditions and can improve the SNR of 5-dB speech by as much as 5.16 dB

Keywords

filtering and prediction theory; speech analysis and processing; SNR; excitation signal; multipulse excitation; multipulse excited pole-zero filtering; noisy voiced speech segment; randomly distributed bipolar pulse sequence; reconstruction error; speech analysis; speech enhancement; speech processing; unipolar periodic impulse train; Electronic switching systems; Filtering; Filters; Noise generators; Noise reduction; Pulse generation; Redundancy; Signal generators; Speech enhancement; Speech processing;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on

Conference_Location

New York, NY

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1988.196641

Filename

196641