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Apparatus and method for speech encoding based on short-term prediction valves

  • US 5,950,155 A
  • Filed: 09/18/1996
  • Issued: 09/07/1999
  • Est. Priority Date: 12/21/1994
  • Status: Expired due to Term
First Claim
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1. A speech encoding method comprising the steps of:

  • generating short-term prediction coefficients based on an input speech signal;

    providing first and second codebooks formed of assorted parameters representing said short-term prediction coefficients, said first and second codebooks relating to at least one of a plurality of characteristic parameters of said input speech signal;

    selecting one of said first and second codebooks based on a pitch value of said input speech signal; and

    quantizing said short-term prediction coefficients using said selected codebook.

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