Filter devices and methods

A filtering is proposed wherein first several filtering steps (I-III, IV-VI) are made. Each step (I-III-IV-IV) includes: generating a filtered signal (I, IV), rounding this filtered signal (II, V) to a certain accuracy and combining (III, VI) the rounded signal with the input signal, whereby a filte...

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Bibliographische Detailangaben
Hauptverfasser:	RIJNBERG ADRIAAN JOHANNES, BRUEKERS ALPHONS ANTONIUS MARIA LAMBERTUS
Format:	Patent
Sprache:	eng
Schlagworte:	ACOUSTICS BASIC ELECTRONIC CIRCUITRY CODE CONVERSION IN GENERAL CODING DECODING ELECTRICITY IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MUSICAL INSTRUMENTS PHYSICS RESONATORS SPEECH ANALYSIS OR SYNTHESIS SPEECH OR AUDIO CODING OR DECODING SPEECH OR VOICE PROCESSING SPEECH RECOGNITION
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Beschreibung
Zusammenfassung:	A filtering is proposed wherein first several filtering steps (I-III, IV-VI) are made. Each step (I-III-IV-IV) includes: generating a filtered signal (I, IV), rounding this filtered signal (II, V) to a certain accuracy and combining (III, VI) the rounded signal with the input signal, whereby a filter error is obtained. The filtered signals are combined (VII) to a first filtered signal that is rounded (VIII) and combined (IX) with the input signal, whereby a coded signal is obtained. This allows to adapt the rounding step (II, V) and the combining step (III, IV) in each filtering step to specific filter design. Thereby limit cycles are reduced, the first filtered signal is available for further processes and the rounding can be inverted in the reverse process. Further a filter method for the reverse process, filter devices (1, 10) able to perform these methods and devices (20, 30, 40, 50, 60) containing such devices are provided.