Data processing: speech signal processing – linguistics – language – Audio signal bandwidth compression or expansion
Reexamination Certificate
2007-02-20
2007-02-20
Dorvil, Richemond (Department: 2626)
Data processing: speech signal processing, linguistics, language
Audio signal bandwidth compression or expansion
C704S223000, C704S219000
Reexamination Certificate
active
10111522
ABSTRACT:
The invention provides a method and an apparatus for synthetic widening of the bandwidth of voice signals. This is done by providing a narrowband voice signal at a predetermined sampling rate; carrying out analysis filtering on the sampled voice signal using filter coefficients, which are estimated from the sampled voice signal, for envelope widening; carrying out residual signal widening on the analysis-filtered voice signal; and carrying out synthesis filtering on the residual-signal-widened voice signal in order to produce a broader band voice signal. The analysis filtering is carried out using identical filter coefficients to those used for the synthesis filtering.
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Jax Peter
Schnitzler Juergen
Dorvil Richemond
Infineon - Technologies AG
Maginot Moore & Beck
Shortledge Thomas E.
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