<p>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.</p>
申请公布号
EP1801787(A1)
申请公布日期
2007.06.27
申请号
EP20060025876
申请日期
2006.12.13
申请人
QNX SOFTWARE SYSTEMS (WAVEMAKERS), INC.
发明人
NONGPIUR, RAJEEV;LI, XUEMAN;HETHERINGTON, PHILLIP A.