The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 1981
Filed:
Sep. 19, 1979
John J Gibson, Princeton, NJ (US);
RCA Corporation, New York, NY (US);
Abstract
In a video disc playback apparatus, a playback stylus is utilized for the recovery of information from prerecorded disc records. In one system, geometric variations are recorded on the surface of the record and are representative of recorded picture and sound information. As these geometric variations pass beneath the stylus, the capacitance between the stylus electrode and the surface of the disc varies in accordance with the recorded representations. The capacitive variations are converted to electrical signal variations in the playback apparatus. In such a video disc playback apparatus, sound interference in the video and video interference in the sound can be produced by the non-linearity of the aforementioned pickup stylus. Use of a non-linear aperture corrector between the pickup circuitry and the demodulator circuitry of the playback apparatus reduces these interferences.