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Recursive pitch predictor employing an adaptively determined search window

  • US 5,812,967 A
  • Filed: 09/30/1996
  • Issued: 09/22/1998
  • Est. Priority Date: 09/30/1996
  • Status: Expired due to Term
First Claim
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1. A method for improved recursive pitch prediction in digital speech signal processing, the method comprising the steps of:

  • a) utilizing a search window that falls within a full pitch window for pitch estimates based upon a location of a previously computed pitch within the search window;

    b) determining pitch estimates for the search window; and

    c) determining an optimal pitch from the pitch estimates within the search window for a first predetermined number of frames, wherein inter-frame correlation of pitch in speech signals is better estimated.

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