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Title: Circuit for suppressing noise caused by scratches on a phonograph record
Abstract:
A circuit for suppressing pulse-shaped interferences in an audio signal caused by scratches on a phonograph disc, comprising a signal processing section connected between an audio frequency input and an audio frequency output, comprising a noise suppressor having a control input; as well as a control signal section connected between the audio frequency input and the control input, said control signal section comprising a first threshold selection circuit connected to the audio frequency input for selecting pulse-shaped signals from the audio signal, followed by a second threshold selection circuit for distinguishing the pulse-shaped signals originating from noise signals from those originating from musical signals.
Other info: Inventors: Peek, Johannes B. H. (Eindhoven, NL) Schmidt, Johan M. (Eindhoven, NL) Application Number: 949917 Filing Date: 1978-10-10 Publication_date: 1980-06-17 Assignee: U.S. Philips Corporation (New York, NY) Primary Class(es): 330/149 330/124R, 369/86, 369/134, 381/94.8, 702/193 Other Classes: US Patent Ref:
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