7th International Conference on Spoken Language Processing

September 16-20, 2002
Denver, Colorado, USA

Word Endpoints Detection in the Presence of Non-Stationary Noise

M. Toma, A. Lodi, R. Guerrieri

University of Bologna, Italy

Most of isolated-word speech recognition systems need to detect boundaries of utterances. In this paper, we present a new approach to accomplish this task of endpoints identification. The proposed algorithm has very low computational complexity, since the parameters used for discrimination are obtained through a re-use of calculations already made by a mel-cepstrum frontend. This endpointer works well in most real-life environments, even the most challenging ones, like non-stationary background noise. In the presence of a babble background noise with an SNR of 0dB the rate of undetected words is about 3.5%.

Full Paper

Bibliographic reference.  Toma, M. / Lodi, A. / Guerrieri, R. (2002): "Word endpoints detection in the presence of non-stationary noise", In ICSLP-2002, 1053-1056.