Method and apparatus for extending the bandwidth of a speech signal
US7734462B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 2006 |
| Grant date | Jun 8, 2010 |
| Priority date | — |
| Expiry date | Dec 2, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L25/18
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A bandwidth extension module, and an associated method and computer-readable medium, suitable for use in artificially extending the bandwidth of a lowband speech signal. The bandwidth extension module comprises a band-pass filter configured to produce a band-pass signal from the lowband speech signal; at least one carrier frequency modulator, each carrier frequency modulator configured to pitch-synchronously modulate the band-pass signal about a respective carrier frequency, the at least one carrier frequency modulator collectively producing a highband speech signal component; a synthesis filter configured to determine a highband speech signal based on the highband speech signal component; and a summation module configured to combine the lowband speech signal with the highband speech signal to obtain a bandwidth-extended speech signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.