Spectrum modeling

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 firs...

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Bibliographische Detailangaben
Hauptverfasser:	OOMEN ARNOLDUS W.J, DEN BRINKER ALBERTUS C
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MEASURING MEASURING ELECTRIC VARIABLES MEASURING MAGNETIC VARIABLES METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS RESONATORS SOUND-PRODUCING DEVICES SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION TESTING TRANSMISSION
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Beschreibung
Zusammenfassung:	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.