Enhanced automatic speech recognition using multiple directional microphones
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United States of America Patent
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Apr 17, 2001
Grant Date -
N/A
app pub date -
Dec 2, 1999
filing date -
Dec 2, 1999
priority date (Note) -
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Abstract
A method and system for simultaneously controlling a plurality of automatic speech recognition (ASR) systems within the working volume of a room, or for controlling multiple devices as a single unified ASR system. Multiple microphones feed a signal processing system which determines or estimates both a user's location and a user's orientation within a room as the user issues voice commands, and further determines the microphone providing the best signal. Diversity noise cancellation may be further applied to the microphone signals. Based on the apparent direction the user is facing, the system may then enable one of the ASR systems for voice command recognition and/or execution of voice commands. The invention reduces the number of false command executions and improves the performance, accuracy, and ease of use of voice control.
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