Noise reduction in the playback of recorded sound

A method of noise reduction wherein two versions (10, 16) of the same original signal, for example of a recording, are simultaneously processed, one being supplied to a digital filter (18) and the other to a delay (12). The difference between the filtered input and delayed input gives an error signa...

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1. Verfasser:	RAYNER, PETER JOHN WYNN
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	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 PHYSICS RESONATORS TRANSMISSION
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creator	RAYNER, PETER JOHN WYNN
description	A method of noise reduction wherein two versions (10, 16) of the same original signal, for example of a recording, are simultaneously processed, one being supplied to a digital filter (18) and the other to a delay (12). The difference between the filtered input and delayed input gives an error signal, and the error signal is processed by a microprocessor programmed with an adaptive algorithm and fed back to vary the characteristics of the filter in such a manner as to reduce the error signal to a minimum, whereupon the digital filter provides the enhanced signal.
format	Patent
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language	eng ; fre ; ger
recordid	cdi_epo_espacenet_EP0336684A2
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subjects	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 PHYSICS RESONATORS TRANSMISSION
title	Noise reduction in the playback of recorded sound
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