System and method for controlling the operation of a device by voice commands

  • US 7,774,204 B2
  • Filed: 07/24/2008
  • Issued: 08/10/2010
  • Est. Priority Date: 09/25/2003
  • Status: Active Grant
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First Claim
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1. A speech recognition system comprising:

  • a microphone;

    a first low power audio channel coupled to the microphone;

    a second audio channel coupled to the microphone; and

    a processor having signal lines coupled to the first and second audio channels,wherein the processor turns on the first low power audio channel and turns off the second audio channel during a low power mode of operation, and the processor turns on the second audio channel when the first low power audio channel receives an input signal above a first threshold.

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