Method and apparatus for extending the bandwidth of a speech...

Details Method and apparatus for extending the bandwidth of a speech... Method and apparatus for extending the bandwidth of a speech...

2006-09-01

2010-06-08

Abebe, Daniel D (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S219000, C704S220000, C375S240110

Reexamination Certificate

active

07734462

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.

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Qian, Yasheng et al., Combining Equalization and Estimation for Bandwidth Extension of Narrowband Speech, Proc. IEEE Int. Conf. Acoustics, pp. I-713-I-716, May 2004.

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