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:
Sep. 05, 1995
Filed:
May. 06, 1994
Ingo Chmielewski, Braunschweig, DE;
Detlef Rath, Hohenhameln, DE;
MB Video GmbH, Peine, DE;
Abstract
The present invention is a process for reducing the noise of a video signal (S1), in particular when reproducing a video signal stored on a video recorder, in which a window is defined around every signal value P (0,0,0) as an output signal value. A mean deviation (.sigma.) of the signal values in the window is established from the output signal values P (0,0,0), and an averaging of the output signal value is carried out with those neighboring signal values in the window which lie within limit values (So, Su) for the deviation from the output signal value P (0,0,0) dependent on the established mean deviation (.sigma.). The method is improved in its effectiveness by at least one threshold value (a1, a2) being fixed for the mean deviation (.sigma.=a/2), by the limit values (So, Su) for a mean deviation lying below the threshold value (a1, a2) being set with values (b) dependent on the established mean deviation (.sigma.) and by the limit values (So, Su) for a mean deviation (.sigma.) lying above the at least one threshold value (a1, a2 ) being determined with a substantially constant, preselected maximum value (b2).