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Method and apparatus for transmitting speech activity in distributed voice recognition systems

  • US 8,050,911 B2
  • Filed: 03/01/2007
  • Issued: 11/01/2011
  • Est. Priority Date: 06/14/2001
  • Status: Expired due to Fees
First Claim
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1. A speech recognition system employed by a wireless subscriber station, comprising a computer-readable storage comprising machine readable instructions that when executed perform a method comprising:

  • receiving an acoustic speech signal, including periods of speech and non-speech, from a user of the wireless subscriber station;

    converting the acoustic speech signal to an electrical speech signal comprising frames;

    determining which frames comprise speech and which frames comprise non-speech to assemble voice activity information;

    identifying feature extraction information related to the electrical speech signal; and

    transmitting the voice activity information and the feature extraction information corresponding to different frames of the speech signal to a wireless base station, wherein the voice activity information is delayed from the speech signal, the feature extraction information is delayed from the speech signal, and the delay of the voice activity information is less than the delay of the feature extraction information.

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