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Systems, methods, and apparatus for speech feature detection

  • US 9,165,567 B2
  • Filed: 04/22/2011
  • Issued: 10/20/2015
  • Est. Priority Date: 04/22/2010
  • Status: Active Grant
First Claim
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1. A method of processing an audio signal, said method comprising:

  • for each of a first plurality of consecutive segments of the audio signal, determining that voice activity is present in the segment;

    for each of a second plurality of consecutive segments of the audio signal that occurs immediately after the first plurality of consecutive segments in the audio signal, determining that voice activity is not present in the segment;

    using at least one array of logic elements, detecting that a transition in a voice activity state of the audio signal occurs during one among the second plurality of consecutive segments that is not the first segment to occur among the second plurality; and

    producing a voice activity detection signal that has, for each segment in the first plurality and for each segment in the second plurality, a corresponding value that indicates one among activity and lack of activity,wherein, for each of the first plurality of consecutive segments, the corresponding value of the voice activity detection signal indicates activity, andwherein, for each of the second plurality of consecutive segments that occurs before the segment in which the detected transition occurs, and based on said determining, for at least one segment of the first plurality, that voice activity is present in the segment, the corresponding value of the voice activity detection signal indicates activity, andwherein, for each of the second plurality of consecutive segments that occurs after the segment in which the detected transition occurs, and in response to said detecting that a transition in the speech activity state of the audio signal occurs, the corresponding value of the voice activity detection signal indicates a lack of activity.

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