JP2002528776A

5G,4G,3G,2G

Title

Not Available

Application Number:

JP20000578811T

Publication Date:

03-09-2002

Current Assignee:

NOT AVAILABLE

Family ID:

4162966

Application Date:

27-10-1999

Declaring Company:

VOICEAGE CORPORATION

Publication Country:

US

Priority Date:

27-10-1998

View on Espacenet goto-link

Title

Not Available

Application Number:

JP20000578811T

Family ID:

4162966

Publication Country:

US

Publication Date:

03-09-2002

Application Date:

27-10-1999

Priority Date:

27-10-1998

Current Assignee:

NOT AVAILABLE

Declaring Company:

VOICEAGE CORPORATION

View on Espacenet goto-link

Abstract  Abstract

(57) Abstract: An auditory weighting device that generates an auditory weighted signal in response to a wideband signal includes a signal pre-emphasis filter, a synthesis filter calculator, and an auditory weighting filter. The signal pre-emphasis filter emphasizes the high frequency components of the wideband signal to generate a pre-emphasized signal. The signal pre-emphasis filter has a transfer function of the formula P (z) = 1-μz −1 , where μ is a pre-emphasis coefficient having a value between 0 and 1. The synthesis filter calculator generates synthesis filter coefficients in response to the pre-emphasized signal. Finally, an auditory weighting filter processes the pre-emphasized signal against the synthesis filter coefficients to produce an auditory weighted signal. The auditory weighting filter has a transfer function of the formula W (z) = A (z / γ 1 ) / (1−γ 2 z −1 ) with a fixed denominator, where 0 <γ 2 <γ 1 ≦ 1 and γ 2 and γ 1 are weighting control values, in which case the weighting of the wideband signal in the formant domain is substantially decoupled from the spectral tilt of this wideband signal.

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