Patent ID: 6098043
Filing Date: 2000-08-01
Classification: G10L

Abstract:
An automated speech recognition system comprising:a voice resource unit for generating a voice prompt signal conveying a voice prompt for delivering information to a user;an automated speech recognition unit for performing speech recognition on a vocal response signal derived from a response uttered by the user;a server unit for controlling the operation of said voice resource unit and of said automated speech recognition unit;a communication channel for transporting the voice prompt signal and the voice response signal, said communication channel having a receiving end and a transmitting end;said automated speech recognition unit receiving as inputs said vocal response signal via the receiving end of said communication channel and said voice prompt signal;said automated speech recognition unit being operative to pass to said transmitting end said voice prompt signal and to perform echo cancellation on a signal present on said receiving end to generate an echo cancelled signal, said automated speech recognition unit being operative to terminate passage to said transmitting end of said voice prompt signal when the echo cancelled signal is a voice response signal conveying a spoken utterance.