Adaptive confidence thresholds in telematics system speech recognition
First Claim
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1. A method of configuring a speech recognition unit in a vehicle, the method comprising:
- receiving a noise error from the speech recognition unit responsive to a user voice command; and
carrying out at least one iteration of the following steps;
reducing a confidence threshold for an appropriate grammar set responsive to the received noise error; and
re-attempting speech recognition in the vehicle using the reduced confidence threshold;
wherein the reducing and re-attempting steps further comprise, during at least one iteration, the steps of storing the voice command prior to the reducing step and then, after the reducing step, attempting speech recognition in the vehicle on the stored voice command using the reduced confidence threshold.
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Abstract
A method of configuring a speech recognition unit in a vehicle. The method includes receiving a noise error from the speech recognition unit responsive to a user voice command and reducing a confidence threshold for an appropriate grammar set responsive to the received noise error.
47 Citations
17 Claims
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1. A method of configuring a speech recognition unit in a vehicle, the method comprising:
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receiving a noise error from the speech recognition unit responsive to a user voice command; and carrying out at least one iteration of the following steps; reducing a confidence threshold for an appropriate grammar set responsive to the received noise error; and re-attempting speech recognition in the vehicle using the reduced confidence threshold; wherein the reducing and re-attempting steps further comprise, during at least one iteration, the steps of storing the voice command prior to the reducing step and then, after the reducing step, attempting speech recognition in the vehicle on the stored voice command using the reduced confidence threshold. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of configuring a speech recognition unit in a vehicle, the method comprising:
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receiving a noise error from the speech recognition unit responsive to a user voice command; and reducing a confidence threshold for an appropriate grammar set responsive to the received noise error, wherein reducing a confidence threshold comprises; retrieving a current confidence threshold responsive to the received noise error; determining whether the current confidence threshold equals a predetermined minimum confidence threshold; and reducing the current confidence threshold by a preset amount based on the determination; wherein the confidence threshold is reduced by the preset amount two or more times responsive to at least two or more respective received noise errors; and wherein the confidence threshold is reduced by the preset amount until the current confidence threshold equals the predetermined minimum confidence threshold. - View Dependent Claims (10)
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11. A method of configuring a speech recognition unit in a vehicle, the method comprising:
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receiving a noise error from the speech recognition unit responsive to a user voice command; reducing a confidence threshold for an appropriate grammar set responsive to the received noise error; and resetting the confidence threshold in response to an ignition event. - View Dependent Claims (12)
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13. A system for configuring a speech recognition unit in a vehicle, the system comprising:
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means for receiving a noise error from the speech recognition unit responsive to a user voice command; and means for iteratively reducing a confidence threshold for an appropriate grammar set responsive to the received noise error and re-attempting speech recognition in the vehicle of a voice command using the reduced confidence threshold, wherein the means for iteratively reducing a confidence threshold and re-attempting speech recognition further comprises means for storing the voice command prior to reducing the confidence threshold and means for attempting speech recognition in the vehicle on the stored voice command using the reduced confidence threshold; wherein the means for receiving a noise error and the means for iteratively reducing a confidence threshold each comprise a processor that executes computer programming that is stored in memory in the vehicle. - View Dependent Claims (14, 15, 16)
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17. A system for configuring a speech recognition unit in a vehicle, the system comprising:
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means for receiving a noise error from the speech recognition unit responsive to a user voice command; means for reducing a confidence threshold for an appropriate grammar set responsive to the received noise error; and means for resetting the confidence threshold in response to an ignition event; wherein the means for receiving a noise error, the means for reducing a confidence threshold, and the means for resetting the confidence threshold each comprise a processor that executes computer programming that is stored in memory in the vehicle.
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Specification