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:
Nov. 24, 1992
Filed:
Aug. 06, 1990
Timothy I Trew, Horley, GB;
U.S. Philips Corporation, New York, NY (US);
Abstract
A video signal with pre-emphasis is applied via an input to an HD-MAC encoder, the encoded output being applied over a first path to an input of an adder. The encoded signal is also applied via a decoder and a further path comprising a de-emphasis circuit, a mean value estimator circuit and a pre-emphasis circuit, to an input of a difference circuit. The video signal from the encoder input is also applied to a second input to the difference circuit, via a reference path comprising components which correspond to the de-emphasis circuit, mean value estimator, and pre-emphasis circuit in the further path. The difference in the pre-emphasized mean values obtained from the difference circuit is applied via a shuffler and added to the video signal in the first path.