BR9914889A

5G,4G,3G,2G

Title

Not Available

Application Number:

BR19999914889

Publication Date:

17-07-2001

Current Assignee:

VOICEAGE CORPORATION

Family ID:

4162966

Application Date:

27-10-1999

Declaring Company:

Publication Country:

US

Priority Date:

27-10-1998

View on Espacenet goto-link

Title

Not Available

Application Number:

BR19999914889

Family ID:

4162966

Publication Country:

US

Publication Date:

17-07-2001

Application Date:

27-10-1999

Priority Date:

27-10-1998

Current Assignee:

VOICEAGE CORPORATION

Declaring Company:

View on Espacenet goto-link

Abstract  Abstract

Invention Patent: <B> PERCEPTION DEVICE AND WEIGHTING METHOD FOR EFFICIENT CODING OF BROADBAND SIGNS <D>. A perceptual weighting device for producing a perceptually weighted signal in response to a broadband signal comprises a signal pre-emphasis filter, a synthesis filter calculator and a perceptual weighting filter. The signals pre-emphasis filter accentuates the high frequency content of the broadband signal to thereby produce a pre-emphasized signal. The signal pre-emphasis filter has a transfer function of the form P (z) = 1 - Áz ^ -1 ^ where Á is the pre-emphasis factor having a value located between 0 and 1. The synthesis is responsive to the pre-emphasized signal to produce the synthesis filter coefficients. Finally, the perceptual weighting filter processes the pre-emphasized signal in relation to the coefficients of the synthesis filter to produce the perceptually weighted signal. The perceptual weighting filter has a transfer function, with the fixed denominator, of the form W (z) A (z / <sym> ~ 1 ~) / (1 - <sym> ~ 2 ~ z ^ -1 ^) where 0 <<sym> ~ 2 ~ <<sym> ~ 1 ~ <243> 1 and <sym> ~ 2 ~ and <sym> ~ 1 ~ are weighting control values, through which the signal weighting in band broadband in a formant region is substantially decoupled from a spectral slope of this broadband signal.

Note:

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Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.

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