Title:
SPECTRUM MODELING
Document Type and Number:
WIPO Patent Application WO2001089086
Kind Code:
A8
Abstract:
Modeling a target spectrum (S) is provided by determining (21) filter parameters (pi,qi) of a filter which has a frequency response approximating the target spectrum (S), wherein the target spectrum is split in at least a first part and a second part, a first modeling operation is used on the first part of the target spectrum to obtain auto-regressive parameters, a second modeling operation is used on the second part of the target spectrum to obtain moving-average parameters, and the auto-regressive parameters and the moving-average parameters are combined to obtain the filter parameters. The invention is preferably applied in audio coding, wherein a spectrum of a noise component (S) in the signal (A) is modeled.
Inventors:
DEN BRINKER ALBERTUS C (NL)
OOMEN ARNOLDUS W J (NL)
OOMEN ARNOLDUS W J (NL)
Application Number:
PCT/EP2000/004599
Publication Date:
May 30, 2002
Filing Date:
May 17, 2000
Export Citation:
Assignee:
KONINKL PHILIPS ELECTRONICS NV (NL)
DEN BRINKER ALBERTUS C (NL)
OOMEN ARNOLDUS W J (NL)
DEN BRINKER ALBERTUS C (NL)
OOMEN ARNOLDUS W J (NL)
International Classes:
G10K15/02; G01R23/16; G10L11/00; G10L19/00; G10L19/06; G10L21/02; G10L21/0208; G11B20/10; H03H17/02; H04B15/00; G10L25/12; G10L25/18; (IPC1-7): H03H17/02
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