| 摘要 |
PURPOSE: To erase a high-amplitude interference signal by intermediate filtration by weighting video signals and successively delayed video signals, adding video signals fetched from successive two frames (X and Y, and Y and Z) to each other, and then, fetching the video signals (Y) which are not weighted with one-frame delays. CONSTITUTION: Since delay devices 2 and 3 delay video signals to be filtered supplied from a terminal 1 by one frame, the video signals of continuous three frames simultaneously appear at points 4-6. The input video signals to the frame X are supplied to a filter control unit 10 together with the signals in the frame Y delayed by one frame and generate control signals KX, 1-KX, KZ, and 1-LZ and the output signals of delay elements 7-9 are supplied to multipliers 11-14 and fetch video signals KX.X, 1-KX.Y, 1-KZ.Y, and KZ.Z. Then the output signals are inputted to adding stages 15 and 16, fetch video signals KZ.X+(1-KX).Y and KZ.Z+(1-KZ.Y), and the fetched video signals are supplied to an intermediate filter, thus non-disturbed video signals are obtained. |
