Bandwidth extension of narrowband speech

Details Bandwidth extension of narrowband speech Bandwidth extension of narrowband speech

2005-12-23

2009-06-09

Chawan, Vijay B (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S264000, C704S219000, C704S500000

Reexamination Certificate

active

07546237

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.

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