Invention Application
US20050108007A1 Perceptual weighting device and method for efficient coding of wideband signals
审中-公开
用于有效编码宽带信号的感知加权装置和方法
- Patent Title: Perceptual weighting device and method for efficient coding of wideband signals
- Patent Title (中): 用于有效编码宽带信号的感知加权装置和方法
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Application No.: US10965795Application Date: 2004-10-18
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Publication No.: US20050108007A1Publication Date: 2005-05-19
- Inventor: Bruno Bessette , Redwan Salami , Roch Lefebvre
- Applicant: Bruno Bessette , Redwan Salami , Roch Lefebvre
- Applicant Address: CA Ville Mont-Royal
- Assignee: Voiceage Corporation
- Current Assignee: Voiceage Corporation
- Current Assignee Address: CA Ville Mont-Royal
- Priority: CA2,252,170 19981027
- Main IPC: G01L11/04
- IPC: G01L11/04 ; G01L21/02 ; G10L13/00 ; G10L19/12 ; H03H17/06 ; H03M7/30 ; H03M7/36 ; H04B1/62 ; H04B7/26 ; H04B14/04 ; H04Q7/22 ; H04Q7/32 ; G10L19/00

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−μz−1, wherein μ 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/γ1)/(1−γ2z−1) where 0
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