Speech recognition system for an automotive vehicle
First Claim
1. A speech recognition system for an automotive vehicle for outputting a plurality of command signals to a plurality of vehicle actuators independently in accordance with spoken instructions, which comprises:
- (a) at least one microphone for transducing spoken instructions into corresponding electric signals and outputting signals corresponding thereto;
(b) a speech recognizer including a parameter extraction section, at least one reference pattern memory unit, a resemblance comparator, a resemblance determination section, and a controller, said speech recognizer being connected to said at least one microphone for extracting time-series matrix-phonetic pattern data from the transduced spoken instruction signals by said parameter extraction section, sequentially comparing the extracted matrix-phonetic pattern data with the reference matrix-phonetic pattern data of a plurality of reference spoken instructions previously stored in said reference pattern memory unit by said resemblance comparator in order to obtain resemblance rates of the extracted pattern data to the reference pattern data, and outputting a command signal corresponding to the transduced spoken instruction signals to one of the actuators when one of the obtained resemblance rates lies within a predetermined range in said resemblance determination section, all the mutual operations within said speech recognizer being executed in accordance with command signals outputted from said controller,(c) at least one means for detecting vehicle-travelling conditions and outputting signals corresponding thereto; and
(d) a speed-dependent speech selection unit connected to both said speech recognizer and said vehicle-travelling condition detecting means for selectively allowing said speech recognizer to activate some of the actuators, according to the detected vehicle-travelling conditions, in response to the spoken instructions corresponding to the actuators,whereby it is possible to prevent actuator operations due to said speech recognizer which would be inappropriate for the current vehicle speed.
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Accused Products
Abstract
A speech recognition system for an automotive vehicle which can selectively activate actuators according to vehicle-travelling conditions in such a way that a spoken instruction such as "Door open" or "Trunk lid open" can be recognized only when vehicle speed is zero, "Headlight high/low beam" can be recognized only when vehicle speed reaches a predetermined value, and "Air conditioner on/off" or "Radio on/off" can be recognized regardless of vehicle speed. The speech recognition system for an automotive vehicle according to the present invention comprises a speed sensor or the like and a speed-dependent speech selection unit including AND gates or analog switches, in addition to the conventional speech recognizer.
94 Citations
14 Claims
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1. A speech recognition system for an automotive vehicle for outputting a plurality of command signals to a plurality of vehicle actuators independently in accordance with spoken instructions, which comprises:
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(a) at least one microphone for transducing spoken instructions into corresponding electric signals and outputting signals corresponding thereto; (b) a speech recognizer including a parameter extraction section, at least one reference pattern memory unit, a resemblance comparator, a resemblance determination section, and a controller, said speech recognizer being connected to said at least one microphone for extracting time-series matrix-phonetic pattern data from the transduced spoken instruction signals by said parameter extraction section, sequentially comparing the extracted matrix-phonetic pattern data with the reference matrix-phonetic pattern data of a plurality of reference spoken instructions previously stored in said reference pattern memory unit by said resemblance comparator in order to obtain resemblance rates of the extracted pattern data to the reference pattern data, and outputting a command signal corresponding to the transduced spoken instruction signals to one of the actuators when one of the obtained resemblance rates lies within a predetermined range in said resemblance determination section, all the mutual operations within said speech recognizer being executed in accordance with command signals outputted from said controller, (c) at least one means for detecting vehicle-travelling conditions and outputting signals corresponding thereto; and (d) a speed-dependent speech selection unit connected to both said speech recognizer and said vehicle-travelling condition detecting means for selectively allowing said speech recognizer to activate some of the actuators, according to the detected vehicle-travelling conditions, in response to the spoken instructions corresponding to the actuators, whereby it is possible to prevent actuator operations due to said speech recognizer which would be inappropriate for the current vehicle speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification