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Robust separation of speech signals in a noisy environment

  • US 7,464,029 B2
  • Filed: 07/22/2005
  • Issued: 12/09/2008
  • Est. Priority Date: 07/22/2005
  • Status: Active Grant
First Claim
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1. A method for improving a speech signal using a voice activity detector, comprising:

  • receiving a first signal;

    receiving a second signal;

    comparing an energy level in the first signal to an energy level in the second signal;

    determining that voice activity is present when the energy level of the first signal is higher than the energy level of the second signal;

    generating a control signal responsive to determining that voice activity is present; and

    controlling a speech enhancement process using the control signal, wherein the speech enhancement process comprises a signal separation process, and a learning process for the signal separation process is activated responsive to the control signal.

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