METHOD FOR DESIGNING DESCREENING FILTER FOR MEDIA PROCESSOR OR THE LIKE

PROBLEM TO BE SOLVED: To obtain a filter approximated to a circular symmetric descreening filter, in which approximation to a desired circular symmetric shape can be attained, even though processing power smaller than that requested for the execution thereof is demanded, in a non-separable circular...

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Bibliographische Detailangaben
1. Verfasser:	BANTON MARTIN E
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRONIC CIRCUITRY CALCULATING COMPUTING COUNTING ELECTRICITY HANDLING RECORD CARRIERS IMAGE DATA PROCESSING OR GENERATION, IN GENERAL IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS PHYSICS PRESENTATION OF DATA RECOGNITION OF DATA RECORD CARRIERS RESONATORS
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Zusammenfassung:	PROBLEM TO BE SOLVED: To obtain a filter approximated to a circular symmetric descreening filter, in which approximation to a desired circular symmetric shape can be attained, even though processing power smaller than that requested for the execution thereof is demanded, in a non-separable circular symmetric descreening filter. SOLUTION: Two separate filters LPP and HPP are designed (designed or produced) to obtain a filter approximating the non-separable circular symmetric descreening filter. The low pass filter LPP is overlapped with the high pass filter and subtracted, whereby a response close to a circular symmetric response, obtained by the currently used non-separable circular symmetric descreening filter, is obtained. COPYRIGHT: (C)2005,JPO&NCIPI