Apparatus of voice bandspreading and method of same

Apparatus of voice bandspreading and method of same

  • CN 102,034,482 B
  • Filed: 06/04/2010
  • Issued: 01/07/2015
  • Est. Priority Date: 09/29/2009
  • Status: Active Grant
First Claim
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1. a voice band extension device, the voice signal that this voice band extension device is restricted via communication line reception bandwidth, expand the frequency band of described voice signal, it is characterized in that, this voice band extension device has:

  • Signal separator portion, described speech signal separation is the extraction noise signal after the frequency component eliminating the noise remove signal after noise and eliminate described noise remove signal from the frequency component of described voice signal from the frequency component of described voice signal by it;

    Noise remove component of signal extension, it supplements the signal of frequency band higher than the frequency band of described noise remove signal to described noise remove signal, generates expanded noise and removes signal;

    Extract noise signal component extension, it supplements the signal of frequency band higher than the frequency band of described extraction noise signal to described extraction noise signal, generates expansion and extracts noise signal;

    Signal intensity adjusting portion, it regulates the signal intensity of either one or both that described expanded noise is removed in signal and described expansion extraction noise signal, is less than with the signal intensity making described expansion extract noise signal the signal intensity that described expanded noise removes signal;

    AndSignal syntheses handling part, it is removed signal and described expansion to the described expanded noise after being regulated by described signal intensity adjusting portion and extracts noise signal and synthesize,Described noise remove component of signal extension is when generating described expanded noise and removing signal, the frequency band of described noise remove signal is made to move to the frequency band of the frequency band higher than described noise remove signal, signal after moving this and described noise remove signal synthesize, the intensity of the signal that the described synthesis in the frequency band of the signal after described movement is obtained decays along with frequency gets higherDescribed extraction noise signal component extension is when generating described expansion and extracting noise signal, the frequency band of described extraction noise signal is made to move to the frequency band of the frequency band higher than described extraction noise signal, signal after moving this and described extraction noise signal are synthesized, and the intensity of the signal that the described synthesis in the frequency band of the signal after described movement is obtained decays along with frequency gets higher.

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