Third International Conference on Spoken Language Processing (ICSLP 94)

Yokohama, Japan
September 18-22, 1994

Comparison of Acoustic Features and Robustness Tests of a Real-Time Recogniser Using a Hardware Telephone Line Simulator

Hugo Van Hamme, Guido Gallopyn, Ludwig Weynants, Bart D'hoore, Hervé Bourlard

Lernout & Hauspie Speech Products N.V., Wemmel, Belgium

Three feature extraction methods for a recogniser for telephone speech are compared : LPC-cepstra, RASTA-PLP and LPC with cepstral mean subtraction (CMS). Training of the discrete-density HMM's happened on a database collected over the telephone, while recognition was done on TI46-Word, played back via a hardware telephone line emulator. The robustness against realistic variations in the telephone line transfer function and in the signal-to-noise ratio is tested.

Full Paper

Bibliographic reference.  Hamme, Hugo Van / Gallopyn, Guido / Weynants, Ludwig / D'hoore, Bart / Bourlard, Hervé (1994): "Comparison of acoustic features and robustness tests of a real-time recogniser using a hardware telephone line simulator", In ICSLP-1994, 1907-1910.