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:
Feb. 07, 1995
Filed:
Mar. 22, 1993
Applicant:
Inventor:
Michael Knee, Strasbourg, FR;
Assignee:
Thomson Consumer Electronics S.A., Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348622 ; 348180 ;
Abstract
A method of measuring noise in a television signal includes the steps of storing an estimated noise value N. The activity values A of blocks of pixels are measured and periodically compared with the estimated noise value N. A first correction value C.sub.v1 is added to the estimated value when A>N and a second correction value C.sub.v2 is subtracted from the noise value N when A.ltoreq.N. The second correction value C.sub.v2 is substantially greater than the first correction value C.sub.v1.