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. 24, 1976
Filed:
Jun. 12, 1974
Charles D Boltz, Jr, Greenwood, IN (US);
RCA Corporation, New York, NY (US);
Abstract
A timing error detecting and speed control system is provided for a video playback system. Signal information which recurs at the horizontal line scanning rate of a prerecorded video signal is derived during playback of a record medium. The signal information is delayed for a period of time which corresponds to the normal duration of one horizontal line of the video signal. An error signal is generated by a comparison of the delayed and undelayed signal information. The error signal is utilized to control a drive mechanism for the playback system. The drive mechanism is adjusted to control the speed of the relative motion between the record medium and a pickup device to reduce timing errors in the recovered video signal.