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:
Feb. 14, 1984
Filed:
Dec. 17, 1981
Kenji Kaneko, Iwai, JP;
Victor Company of Japan Ltd., , US;
Abstract
A rotary recording medium reproducing apparatus reproduces a rotary recording medium having a spiral video signal track recorded with a video signal by use of a reproducing element, where the recording medium further has a reference signal track between each information signal track turn alternately switched over and recorded with first and second reference signals for an interval corresponding to each track turn, and recorded with a third reference signal at a position corresponding to the position where the first and second reference signals are switched over. The reproducing apparatus comprises a standard signal generating circuit for generating first and second standard signals respectively having frequencies equal to the horizontal scanning frequency and the vertical scanning frequency of the recorded video signal, a waveform shaping circuit for synchronizing a reproduced third reference signal with the first standard signal from the standard signal generating circuit, and subjecting the reproduced third reference signal to waveform-shaping, a switching signal forming circuit for forming a switching signal in response to the second standard signal from the standard signal generating circuit and the signal from the waveform shaping circuit, and a circuit for obtaining a tracking control signal for controlling tracking of the reproducing element by switching reproduced first and second reference signals by the formed switching signal.