APPARATUS FOR ADAPTIVELY CONTROLLING A RECURSIVE VIDEO SIGNAL FILTER

摘要

THE INVENTION CONCERNS A WEIGHTING FACTOR GENERATING CIRCUIT FOR A RECURSIVE VIDEO SIGNAL FILTER COMPRISING A MEANS FOR DELAYING THE SIGNAL SUBSTANTIALLY OF AT LEAST ONE IMAGE PERIOD AND A MEANS FOR WEIGHTING AND COMBINING THE RECEIVED SIGNALS RECEIVED, WHICH HAS A CONTROL INPUT ORIFICE. / P P ACCORDING TO THE INVENTION, IT INCLUDES A MEANS 12 THAT MEETS THE SIGNALS RECEIVED AND DELAYED TO DEVELOP DIFFERENCE SAMPLES INDICATING THE MOVEMENT OF THE IMAGE BETWEEN TWO SUCCESSIVE IMAGES ; A MEANS FOR THEIR RESPONDENT TO DEVELOP A SAMPLE OF THE REPRESENTATIVE MINIMUM NOISE SIGNAL IN AN IMAGE PART OF AN IMAGE PERIOD; A MEAN 40-46 ME RESPONDING TO DEVELOP A VALUE OF THRESHOLD; A MEANS OF SAMPLES OF DIFFERENCE AND THRESHOLD VALUE TO PRODUCE A MOVEMENT SIGNAL WHEN THE SIZE OF THE SAMPLE OF DIFFERENCE EXCEEDS THOSE OF THE THRESHOLD VALUE; AND A MEANS 34, 38 MEANS THE MOTION SIGNAL FOR PRODUCING THE CONTROL SIGNALS. / P P THE INVENTION APPLIES IN PARTICULAR TO TELEVISION. / P