Bandwidth extension of narrowband speech

Bandwidth extension of narrowband speech

  • CN 1,988,565 B
  • Filed: 12/25/2006
  • Issued: 09/17/2014
  • Est. Priority Date: 12/23/2005
  • Status: Active Grant
First Claim
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1. a system of expanding the bandwidth of the voice signal in narrow-band spectrum, comprising:

  • High frequency band generator, it produces high spectrum based on described narrow-band spectrum;

    Background noise generator, its background noise based in described narrow-band spectrum and produce high frequency background noise spectrum;

    AndBe connected to the adder of described high frequency band generator and described background noise generator, it is by described high frequency bands of a spectrum and described narrow-band spectrum and the combination of described high frequency background noise spectrum.

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