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. 03, 1990
Filed:
Jul. 24, 1989
Applicant:
Inventor:
Jack J Campbell, San Francisco, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ; H04N / ; H04N / ;
U.S. Cl.
CPC ...
358166 ; 358167 ; 358133 ; 358156 ; 36472401 ; 455313 ;
Abstract
A method for reducing ringing artifacts caused by low pass filtering of baseband television signals comprises the steps of: detecting the occurrence of a horizontal transition in the baseband television signal as by measuring its magnitude and spectral slope, developing a control signal from the detected horizontal transition which is related in duration to the horizontal transition, applying the control signal smoothly and adaptively to modify the structure of a low pass filter structure during the duration of the control signal to minimize ringing response of the structure.