| 摘要 |
PURPOSE:To form an excellent interpolation signal with simple constitution depending on logical discrimination of an amplitude of a signal by comparing amplitudes of plural vicinity picture element signals and using a prescribed order number of signals from the larger or smaller order as an interpolation signal. CONSTITUTION:The quantity of A signal of an input section of a 1st delay circuit 202 and that of a signal of an output section are discriminated by a sequence discrimination section 205 and the quantity of a signal of an input section of a 2nd delay circuit 203 and that of the amplitude of a signal of the output section are discriminated by a sequence discrimination section 206. Then a signal obtained at a minimum value output terminal of the discrimination sections 205, 206 is fed to other sequence discrimination section 207, and the quantity of the amplitude of a minimum value output of the sequence discrimination section 205 and that of the sequence discrimination section 206 are discriminated by the sequence discrimination section 207. Then a signal obtained at a maximum value output terminal of the sequence discrimination section 207 is used as an output signal of an interpolation filter and the signal is fed to a 2nd fixed contact 210b of a changeover switch 210 via a time axis compression circuit 208 and a 3rd delay circuit 209. |
