Method and device for adaptive bandwidth pitch search in coding wideband signals

Method and device for adaptive bandwidth pitch search in coding wideband signals

CN
  • CN 1,328,681 A
  • Filed: 10/27/1999
  • Published: 12/26/2001
  • Est. Priority Date: 10/27/1998
  • Status: Abandoned Application
First Claim
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1. a tone analysis equipment is used to produce a best tone code book parameter sets, comprising:

  • A) at least two signal paths with corresponding tone code book parameter correlation, wherein;

    I) each signal path comprises a tone prediction error computing equipment that is used for searching from a tone code book tone code vector of calculation of equipments prediction error;

    WithIi) at least one signal path comprises a wave filter in two signal paths, this tone code vector is being provided to before the tone prediction error computing equipment in this path, and this wave filter is used for this tone code vector is carried out filtering;

    WithB) selector switch, be used for comparison in tone prediction error that described at least two signal paths calculated, and be used to select to have the signal path of minimum calculating tone prediction error, and be used to select the tone code book parameter sets relevant with this selected signal path.

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