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:
Jul. 01, 1997
Filed:
Sep. 27, 1995
Henry Sebastian Landgraf, Cherry Hill, NJ (US);
General Instrument Corporation of Delaware, Hatboro, PA (US);
Abstract
Suppressed synchronizing signals of a scrambled standard TV picture are recovered and the picture unscrambled by a method including the steps of: separating a video portion having suppressed sync signals from an audio portion of a TV picture at an intermediate frequency level, amplifying the video portion through a gain controlled amplifier, selectively compensating for the suppressed levels of sync signals, passing the video portion with recovered sync signals of the TV picture through a demodulator, and providing a feedback signal from the demodulator to the gain controlled amplifier to automatically control its gain and thereby minimize artifacts in the TV picture after sync recovery. This new method is easily carried out by apparatus using only a few standard circuit components which can be manufactured as an application specific integrated circuit (ASIC).