Bandwidth extension of acoustic signals

Details Bandwidth extension of acoustic signals Bandwidth extension of acoustic signals

2008-04-15

2008-04-15

Vo, Huyen X. (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S500000, C704S268000, C704S203000

Reexamination Certificate

active

07359854

ABSTRACT:
A solution for improving the perceived sound quality of a decoded acoustic signal is accomplished by extending the spectrum of a received narrow-band acoustic signal (aNB). A wide-band acoustic signal (AWB) is produced by extracting at least one essential attribute (zNB) from the narrow-band acoustic signal (aNB). Parameters, e.g., representing signal energies, with respect to wide-band frequency components outside the spectrum (ANB) of the narrow-band acoustic signal (aNB), are estimated based on the at least one essential attribute (zNB). This estimation involves allocating a parameter value to a wide-band frequency component, based on a corresponding confidence level.

REFERENCES:
patent: 5455888 (1995-10-01), Iyengar et al.
patent: 5950153 (1999-09-01), Ohmori et al.
patent: 5956686 (1999-09-01), Takashima et al.
patent: 6539355 (2003-03-01), Omori et al.

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