Bandwidth extension of bandlimited audio signals

Details Bandwidth extension of bandlimited audio signals Bandwidth extension of bandlimited audio signals

2005-09-16

2009-12-08

Abebe, Daniel D (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S212000, C704S504000, C370S234000, C370S468000

Reexamination Certificate

active

07630881

ABSTRACT:
A system extends a bandwidth of bandlimited audio signals by analyzing bandlimited audio signals at a transmission cycle rate. The analyzer may obtain a bandlimited parameter at a transmission cycle rate. A mapping device or logic in the system obtains a wideband parameter based on the bandlimited parameter. An audio signal generator generates a highband and/or lowband audio signal based on the wideband parameter at the transmission cycle rate. In some systems, the bandlimited audio signal is analyzed at the transmission cycle rate. The highband and/or lowband audio signals and the combined wideband audio signal are generated at the transmission cycle rate.

REFERENCES:
patent: 5455888 (1995-10-01), Iyengar et al.
patent: 5978759 (1999-11-01), Tsushima et al.
patent: 7346007 (2008-03-01), Curcio et al.
patent: 2001/0044722 (2001-11-01), Gaustafsson et al.
patent: 2002/0138268 (2002-09-01), Gustafsson
patent: 2002/0154656 (2002-10-01), Kitchin
patent: 2003/0093279 (2003-05-01), Malah et al.
patent: 2005/0187759 (2005-08-01), Malah et al.
Epps, J. and Holmes, W.H., “A New Technique for Wideband Enahncement of Coded Narrowband Speech”,IEEE, 1999, pp. 174-176.
Epps, J. and Holmes, W.H., Speech Enhancement Using STC-Based Bandwidth Extension,Proc. International Conference on Spoken Language, Sidney Australia, 1998, 4 pages.
Iser, Bernd et al., “Neural Networks Versus Codebooks in an Application for Bandwidth Extension of Speech Signals”,Eurospeech 2003—Geneva, 2003, 4 pages.
Kornagel, Ulrich, “Spectral Widening of the Exitation Signal for Telephone-Based Speech Enhancement”,International Workshop on Acoustic Echo and Noise Control, Germany 2001, pp. 215-218.
Schnitzler, Jürgen, “A 13.0 Kbit/s Wideband Speech Codec Based on SB-ACELP”,IEEE, 1998, pp. 157-160.

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