| 摘要 |
PURPOSE:To form an interpolation signal not causing flicker and deterioration in resolution by applying average interpolation to a low frequency component of an original signal through a delay line for a prescribed delay time and applying pre-value interpolation to a high frequency component of an original signal. CONSTITUTION:The original signal is inputted to an input terminal 20 and the original signal is fed to a low pass filter(LPF) 22 for low frequency component output and a high pass filter(HPF) 24 for high frequency component extraction. An output of the LPF 22 fed to a 1st input of an adder circuit 30 via a 1H delay line 24 and a 1/2 circuit 28 and fed to a 2nd input of the adder circuit 30 via a 1/2 circuit 32. The output of the HPF 24 is fed to a 3rd input of the adder circuit 30, the adder 30 sums the 1st, 2nd and 3rd input signals and outputs the sum to an output terminal 34. The 1/2 circuits 28, 32 halve the amplitude of the input signals. Thus, the adder circuit 30 applies average interpolation to a low frequency component from the LPF 22 and applies pre- value interpolation as to the high frequency component from the HPF 24. |
