US2005108007A1

5G,4G,3G,2G

Title

Perceptual Weighting Device and Method for Efficient Coding of Wideband Signals

Application Number:

US20040965795

Publication Date:

19-05-2005

Family ID:

Application Date:

18-10-2004

Declaring Company:

Publication Country:

US

Priority Date:

27-10-1998

Title

Perceptual Weighting Device and Method for Efficient Coding of Wideband Signals

Application Number:

US20040965795

Family ID:

Publication Country:

US

Publication Date:

19-05-2005

Application Date:

18-10-2004

Priority Date:

27-10-1998

Declaring Company:

Abstract  Abstract

A perceptual weighting device for producing a perceptually weighted signal in response to a wideband signal comprises a signal pre-emphasis filter, a synthesis filter calculator, and a perceptual weighting filter. The signal pre-emphasis filter enhances the high frequency content of the wideband signal to thereby produce a pre-emphasized signal. The signal pre-emphasis filter has a transfer function of the form: P(z)=1-muz<-1>, wherein mu is a pre-emphasis factor having a value located between 0 and 1. The synthesis filter calculator is responsive to the pre-emphasized signal for producing synthesis filter coefficients. Finally, the perceptual weighting filter processes the pre-emphasized signal in relation to the synthesis filter coefficients to produce the perceptually weighted signal. The perceptual weighting filter has a transfer function, with fixed denominator, of the form: W(z)=A(z/gamma1)/(1-gamma2z<-1>) where 0<gamma2<gamma1<=1.

Note:

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The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.

Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

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

Family member:related patents or applications that share a common priority or original filing.