| 摘要 |
PROBLEM TO BE SOLVED: To provide a system and a method for suitably extends a bandwidth of a narrowband speech signal to a broadband spectrum. SOLUTION: The system (100) extends the bandwidth of the narrowband speech signal to the broadband spectrum. The system includes a high-band generator (102) for generating a high frequency spectrum based on a narrowband spectrum. A background noise generator (104) generates a high frequency background noise spectrum based on background noise in the narrowband spectrum. A summing circuit which is linked to the high-band generator and the background noise generator, combines the high frequency spectrum, the narrowband spectrum and the high frequency background noise spectrum. COPYRIGHT: (C)2007,JPO&INPIT
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