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:
May. 23, 2006
Filed:
Oct. 25, 2002
Diego Coste, Varces, FR;
Diego Coste, Varces, FR;
STMicroelectronics SA, Montrouge, FR;
Abstract
A synchronization process may include detecting successive horizontal synchronization pulses of a video signal, and a phase comparison between the successive detected pulses and the successive transitions of the reference signal for controlling the oscillator of the phase-locked loop. The detection of each horizontal synchronization pulse may include sampling the video signal, low-pass filtering the sampled signal, thresholding the filtered signal for leaving pulses having a level below a threshold. The synchronization process may also include selecting, as a function of predetermined selection criteria, from among the residual pulses within an observation window centered on a transition of the reference signal for the one which corresponds to the horizontal synchronization pulse.