Bandwidth extension of narrowband speech

Bandwidth extension of narrowband speech

  • CN 1,988,565 A
  • Filed: 12/25/2006
  • Published: 06/27/2007
  • Est. Priority Date: 12/23/2005
  • Status: Active Grant
First Claim
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1. system that expands the bandwidth of narrow band voice signal comprises:

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

    The background noise generator, it produces the high frequency background noise spectrum based on the background noise in the described narrow-band spectrum;

    AndBe connected to the adder of described high frequency band generator and described background noise generator, it combines high frequency band spectrum and narrow-band spectrum with described high frequency background noise spectrum.

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