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:
Dec. 01, 1981
Filed:
Aug. 11, 1980
Joseph W Stephens, Plainfield, IN (US);
Kou-Jay Yang, Indianapolis, IN (US);
RCA Corporation, New York, NY (US);
Abstract
Horizontal synchronizing pulses are separated from a composite video signal and applied to a detector for producing an error signal representative of the timebase error of each pulse relative to a timebase reference having a period of approximately one horizontal line. Changes in the error signal are inhibited when the time period between pulses differs substantially from one line. Peak values of a given frequency component of the error signal are detected and averaged to provide an output signal manifestation representative of the frequency, amplitude and grouping of the timebase errors and which is relatively unbiased by pulses having a period substantially different from the period of the timebase reference. The apparatus may be used, illustratively, for quality control purposes and timebase error source identification in video disc mastering, replication and playback apparatus as well as for measurement of the effectiveness of timebase correction apparatus.