Data processing: speech signal processing – linguistics – language – Speech signal processing – For storage or transmission
Reexamination Certificate
2006-10-17
2006-10-17
McFadden, Susan (Department: 2626)
Data processing: speech signal processing, linguistics, language
Speech signal processing
For storage or transmission
C704S219000, C704S226000
Reexamination Certificate
active
07124078
ABSTRACT:
A speech coder comprises a first speech enhancement module receiving a digitized speech signal and producing a first enhanced speech signal, a second speech enhancement module receiving the digitized speech signal and producing a second enhanced speech signal, an analysis module that receives the second enhanced speech signal and produces an analyzed speech signal, a first weighting filter that receives the second enhanced speech signal and the analyzed speech signal and produces a second weighted enhanced signal, a quantizer module that receives the analyzed speech signal and produces a quantized speech signal, a synthesizer module that receives the quantized speech signal and an error signal to produce a synthesized speech output signal and a second weighting filter that receives the synthesized speech output signal to produce a first weighted enhanced signal. A subtraction module calculates a difference between the first weighted enhanced signal and the second weighted enhanced signal which difference is utilized to calculate the error signal.
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Accardi Anthony J.
Cox Richard Vandervoort
AT&T Corp.
McFadden Susan
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