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Methods and systems for determining and using a confidence level in speech systems

  • US 10,276,159 B2
  • Filed: 05/10/2016
  • Issued: 04/30/2019
  • Est. Priority Date: 05/10/2016
  • Status: Expired due to Fees
First Claim
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1. A method of validating speech inputs for controlling one or more vehicle systems of a vehicle, comprising:

  • validating the speech inputs periodically and upon events by using predictive phraseology stored in a data storage device of the vehicle, and by using situational information received by the one or more vehicle systems to determine eligible voice features of the vehicle by;

    receiving speech input from an audio channel;

    performing, by a processor, speech recognition on the speech input to obtain recognized results wherein the speech input has not yet been validated;

    determining by the processor whether one or more conditions exist related to the speech input in order to validate the speech input wherein if the one or more conditions exist then validating an accuracy and an integrity of an audio channel of the speech input by;

    determining for validating the accuracy of the audio channel, by a processor, an accuracy level of the audio channel based on whether the one or more conditions exist for updating a confidence level of a speech output and by computing a comparison of the recognized results and the predictive phraseology in order to assign a descriptive level to the audio channel based on the comparison, anddetermining for validating the integrity of the audio channel, by a processor, an integrity level of the audio channel based on the context of the speech input as indicated by current configuration settings of the vehicle and on situational awareness information provided by the vehicle or remote systems by;

    computing a comparison of the content of the speech input to an expected content, and assigning the integrity level based on the computed comparison for associating a tag indicative of the integrity level of the audio channel with messages of the audio channel;

    communicating descriptive labels with the recognized results, accuracy level, and the integrity level to the vehicle system wherein the descriptive labels are associated with the tag indicative of the accuracy level and integrity level of the audio channel; and

    selectively using the recognized results by the vehicle system based on the accuracy level and the integrity level to determine the eligible voice features of the vehicle.

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