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. 16, 1997
Filed:
Sep. 08, 1994
Brion L Dunbar, Grass Valley, CA (US);
Daniel J Chaplin, Nevada City, CA (US);
Tektronix, Inc., Wilsonville, OR (US);
Abstract
A motion detector and improved key signal interpolator using the same inputs a video signal to both a frame and a field based interpolator to produce both frame and field interpolated signals. The frame and field interpolated signals are input to a mixer. The frame interpolated signal also is input to a frame delay circuit, the output of which is subtracted from input to produce a motion signal. The motion signal is converted by an absolute value/lookup table into a mix signal that is also input to the mixer. The mix signal determines which interpolated signal at the input is passed to the output, the field interpolated signal being passed when motion is detected and the frame interpolation signal being passed when motion is not detected. A temporally filtered frame interpolation signal may be produced from the output and input of the frame delay circuit, and the mix signal in response to a temporal filter coefficient input to the absolute value/lookup table mixes the temporally filtered frame and frame interpolated signals to produce a final frame interpolated signal that in turn is mixed with the field interpolated signal to produce the output signal.