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. 12, 1999
Filed:
Mar. 24, 1997
Applicant:
Inventor:
Kenneth Alfred Boehlke, Beaverton, OR (US);
Assignee:
Focus Enhancements, Inc., Wilmington, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348524 ; 348521 ;
Abstract
A synchronizing signal generator produces a PAL standard horizontal synchronizing signal using a standard subcarrier signal as a timing reference. The synchronizing signal period is not an even multiple of the subcarrier signal period. To produce the synchronizing (sync) signal, the generator first frequency multiplies and divides the input signal to produce a reference signal having a period that is a rational multiple of the subcarrier signal period but smaller than the desired sync signal period. The generator then delays each successive pulse of the reference signal by increasingly longer delay times to produce the sync signal.