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:
Aug. 06, 1996
Filed:
Jun. 03, 1994
Applicant:
Inventor:
Gerhard Wischermann, Weiterstadt, DE;
Assignee:
U. S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04N / ;
U.S. Cl.
CPC ...
348618 ; 348701 ;
Abstract
A method of reducing noise in the signal of a motion detector for recursive filtering of video signals, in which the signal is median-filtered. A part of the amplitude range of this signal located below a threshold value is suppressed and the signal is subsequently used for forming the factor (k) controlling the recursive filter. In the case of stationary images or images of little motion, the factor (k) is set at a maximum value dependent upon interference pulses occurring in the video input signal (V1) and at a minimum value dependent upon interference pulses occurring in the video output signal (V2).