Title: Bandwidth extension of narrowband speech
Application Number: 200610169950 Application Date: 2006.12.25
Publication Number: 1988565 Publication Date: 2007.06.27
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H04M3/18;H04M3/42
Applicant(s) Name: QNX Software Systems Wavemaker Address:
Inventor(s) Name: Rajeev Nongpiur;Xueman Li;Phillip A. Hetherington
Attorney & Agent: shacha
Abstract:
    A system extends the bandwidth of a narrowband speech signal into a wideband spectrum. The system includes a high-band generator that generates a high frequency spectrum based on a narrowband spectrum. A background noise generator generates a high frequency background noise spectrum based on a background noise within the narrowband spectrum. A summing circuit linked to the high-band generator and the background noise generator combines the high frequency spectrum and narrowband spectrum and the high frequency background noise spectrum.
Time: 9
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