Patent ID: 6785365
Filing Date: 2004-08-31
Classification: G10L

Abstract:
In a speech recognition system, the improvement comprising apparatus for detecting the presence of user speech on a telephone line input to the system concurrent with the emission of a voice prompt by said system, comprising:A. means (1) forming a first measurement of said input over at least a first interval characterized primarily by residue of said prompt, and (2) forming a measurement over at least a second interval characterized primarily by both said prompt residue and user speech; B. means forming an attenuation parameter based on said first and second measurements; C. means for comparing said input over intervals subsequent to said first and second intervals with said attenuation parameter and providing a prompt-termination signal when said input and said attenuation parameter bear a defined relation to each other; and D. means responsive to said prompt-termination signal to terminate said prompt.