PICTURE SIGNAL CORRECTING DEVICE

摘要

PURPOSE:To completely correct even a shading waveform having a peak level at the outside of a peak level detection section by providing a non-inverting amplifier circuit between a peak level detection circuit and a shading waveform detecting/reproducing circuit. CONSTITUTION:The non-inverting amplifier circuit 11 is inserted between the peak level detection circuit 7 and the shading waveform detecting reproducing circuit 8. An output Vpeak of the circuit 7 is amplified by an amplification factor A by the operation of the circuit 11. A value AXVpeak is inputted to the circuit 8 and the amplification factor A is set to a value so that a Video signal is sufficiently within a value of GND-AXVpeak. Thus, the data from a RAM 9 is subject to D/A conversion by using the AXVpeak as a reference voltage at the shading waveform reproduction. Thus, a shading reproducing signal VDAO coincident accurately with the Video signal is obtained.