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:
Oct. 04, 1988
Filed:
Jun. 11, 1987
Alvin R Balaban, Lebanon, NJ (US);
Steven A Steckler, Clark, NJ (US);
RCA Licensing Corporation, Princeton, NJ (US);
Abstract
A horizontal phase detector of a television apparatus receives an analog composite video signal that is sampled and digitized at a rate determined in accordance with a clock signal. The leading edge of a simulated sync pulse signal is computed from the digitized signal using interpolation. The phase detector also receives a second signal that is indicative of a transition edge of a horizontal oscillator signal. The timing of the transition edge is contained in first and second signal parts. The first part is a periodic signal having a transition edge coincident with that of the clock signal, and the second part is a skew signal that represents a fraction of the period of the clock signal. The leading edge of the computed sync pulse signal is phase-compared with the oscillator transition edge to generate a phase difference signal for synchronizing horizontal oscillator operation.