DocumentCode :
395198
Title :
Depitch and the role of fundamental frequency in speaker recognition
Author :
Zilea, R.D. ; Navratil, Jiri ; Ramaswamy, Ganesh N.
Author_Institution :
IBM T. J. Watson Res. Center, Yorktown Heights, NY, USA
Volume :
2
fYear :
2003
fDate :
6-10 April 2003
Abstract :
Pitch information is known to be partially conveyed in Mel cepstral features that are commonly used for speaker recognition. In particular, for high pitched female speakers, and whenever average pitch varies significantly between enrollment and testing, the fine spectral structure introduced by the fundamental frequency was shown to degrade speaker recognition performance. This paper introduces a signal processing procedure termed depitch that attempts to remove pitch information from the speech signal. Recognition experiments carried out on the female subset of the NIST 2002 Speaker Recognition Evaluation show that by combining scores from a conventional and a depitched system, a substantial improvement in equal error rate is obtained for high pitched speakers and pitch-mismatched trials. Performing pitch/depitch score fusion is also shown to help alleviate the well-known problem of "goat" speakers.
Keywords :
cepstral analysis; feature extraction; speaker recognition; Mel cepstral features; NIST 2002 speaker recognition evaluation; average pitch; depitch algorithm; enrollment; fine spectral structure; fundamental frequency; goat speakers; high pitched female speakers; pitch information; pitch/depitch score fusion; signal processing; speaker recognition systems; speech signal; testing; Cepstral analysis; Degradation; Error analysis; Mel frequency cepstral coefficient; Power harmonic filters; Power system harmonics; Signal processing; Speaker recognition; Speech processing; Testing;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on
ISSN :
1520-6149
Print_ISBN :
0-7803-7663-3
Type :
conf
DOI :
10.1109/ICASSP.2003.1202299
Filename :
1202299
Link To Document :
بازگشت