SPEECH RECOGNIZER PERFORMANCE IN CAR AND HOME APPLICATIONS UTILIZING NOVEL MULTIPLE MICROPHONE CONFIGURATIONS
First Claim
1. A signal processing system to improve speech recognition, comprising:
- a loudspeaker system for playback of audio content;
a sound transducer for input of speech utterances from a recognition system user;
a multi-channel signal processing system configured to receive speech utterance input from said sound transducer and from at least one additional audio source, the signal processing system being operative to enhance the recognition quality of the received speech utterance;
a switching system coupled to said signal processing system and to said loudspeaker system, the switching system being operative to selectively couple said loudspeaker system to said signal processing system thereby utilizing said loudspeaker system as said additional audio source.
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Accused Products
Abstract
System speakers are switched to function as sound input transducers to improve recognizer performance and to support recognizer features. A crossbar switch is selectively activated, either manually or under software control, to allow system loudspeakers to function as sound input transducers that supplement the recognition system microphone or microphone array. Using loudspeakers as “microphones” improves speech recognition in noisy environments, thus attaining better recognition performance with little added system cost. The loudspeakers, positioned in physically separate locations also provide spatial information that can be used to determine the location of the person speaking and thereby offer different functionality for different persons. Acoustic models are selected based on environmental and vehicle operating conditions and may be adapted dynamically using ambient information obtained using the loudspeakers as sound input transducers.
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Citations
38 Claims
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1. A signal processing system to improve speech recognition, comprising:
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a loudspeaker system for playback of audio content;
a sound transducer for input of speech utterances from a recognition system user;
a multi-channel signal processing system configured to receive speech utterance input from said sound transducer and from at least one additional audio source, the signal processing system being operative to enhance the recognition quality of the received speech utterance;
a switching system coupled to said signal processing system and to said loudspeaker system, the switching system being operative to selectively couple said loudspeaker system to said signal processing system thereby utilizing said loudspeaker system as said additional audio source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of improving speech recognition, comprising:
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selectively interrupting playback of audio content through a loudspeaker system while concurrently utilizing said loudspeaker system as a sound input transducer;
receiving an input speech utterance from a recognition system user through a plurality of transducers that include said loudspeaker system; and
processing said received input speech utterance to enhance recognition quality. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A speech recognition system for incorporation into an automotive vehicle having an audio system with an associated loudspeaker system, comprising:
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a sound transducer for input of speech utterances from a recognition system user;
a multi-channel signal processing system configured to receive speech utterance input from said microphone and from at least one additional audio source, the signal processing system being operative to enhance the recognition quality of the received speech utterance;
a switching system coupled to said signal processing system and to said loudspeaker system, the switching system being operative to selectively couple said loudspeaker system to said signal processing system thereby utilizing said loudspeaker system as said additional audio source.
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24. A speech recognition system for integrating into a home entertainment system having a loudspeaker system for playback of audio content, comprising:
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a sound transducer for input of speech utterances from a recognition system user;
a multi-channel signal processing system configured to receive speech utterance input from said microphone and from at least one additional audio source, the signal processing system being operative to enhance the recognition quality of the received speech utterance;
a switching system coupled to said signal processing system and to said loudspeaker system, the switching system being operative to selectively couple said loudspeaker system to said signal processing system thereby utilizing said loudspeaker system as said additional audio source.
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25. A signal processing system to improve speech recognition, comprising:
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a loudspeaker system for playback of audio content;
a microphone for input of speech utterances from a recognition system user;
a multi-channel signal processing system configured to receive speech utterance input from said sound transducer and from at least one additional audio source, the signal processing system being operative to enhance the recognition quality of the received speech utterance;
a switching system coupled to said signal processing system and to said loudspeaker system, the switching system being operative to selectively couple said loudspeaker system to said signal processing system thereby utilizing said loudspeaker system as said additional audio source.
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26. A speech recognition system, comprising:
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a loudspeaker system for playback of audio content;
a sound transducer for input of speech utterances from a recognition system user;
a recognizer configured to receive speech utterance input from said sound transducer and configured to use at least one acoustic model in the recognition of said speech utterance input;
an acoustic model selection system coupled to said recognition system and being operative to selectively control the acoustic model used by said recognition system based on at least one environment parameter;
said acoustic model selection system further using said loudspeaker system to assist in determining the acoustic model used by said recognition system. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A speech recognition system, comprising:
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a recognizer configured to receive speech utterance input from a sound transducer and configured to use at least one acoustic model in the recognition of said speech utterance input;
an acoustic model selection system coupled to said recognition system and being operative to selectively control the acoustic model used by said recognition system based on at least one sensed operating parameter;
a decision logic unit coupled to said module selection system that ascertains at least one vehicle operating parameter and causes the model selection system to change at least one aspect of the acoustic model used by the recognizer based on said operating parameter. - View Dependent Claims (37, 38)
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Specification