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:
Apr. 03, 2012
Filed:
May. 31, 2007
Ken Gordon Buttle, Folsom, CA (US);
Tim John Lascano Callahan, Grass Valley, CA (US);
Ken Gordon Buttle, Folsom, CA (US);
Tim John Lascano Callahan, Grass Valley, CA (US);
GVBB Holdings S.A.R.L, Luxembourg, LU;
Abstract
A method for stabilizing delay during conversion between Standard Definition (SD) video and High Definition (HD) video includes the step of establishing an integer divide ratio (M/N) corresponding to a ratio of clock rates with the output and input formats. The output clock rate is generated from the input clock rate by a Phase Lock Loop () using the M/N divide ratio to provide a known phase relationship between the two clocks rates at a repetitive interval. The video frame can be transferred at the known repetitive interval to provide coarse control over the input-to-output video delay. A separate fine tuning control (delay block) is provided to enable any programmable delay in video throughput to be accommodated to an accuracy of ±0.5 output pixel periods.