Voicing index controls for CELP speech coding

Voicing index controls for CELP speech coding

  • CN 1,757,060 B
  • Filed: 03/11/2004
  • Issued: 08/15/2012
  • Est. Priority Date: 03/15/2003
  • Status: Active Grant
First Claim
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1. a raising has comprised the method for the synthetic speech quality in the speech coding system of encoder, and said method comprises:

  • Obtain input speech signal;

    Utilize Code Excited Linear Prediction (CELP) scrambler that said input voice are encoded, be used for the synthetic CELP coding parameter of said input speech signal with generation;

    Generate a plurality of CELP speech frames, each frame of said a plurality of CELP speech frames comprises said CELP coding parameter;

    Produce the speech index, wherein, said speech index is indicated in a plurality of classification of said input speech signal, each in said a plurality of classification of wherein said input speech signal represent said input speech signal periodically in various degree;

    AndSaid speech index is sent to said demoder as the part of each frame of said a plurality of CELP speech frames, to improve the said synthetic of said input speech signal.

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