Abstract: When two projecting units or more project two pictures or more obtained from video signals and luminance levels of projected pictures at an overlapped portion thereof are adjusted, a picture to be adjusted is selected from the projected pictures. One of processings for adjusting a correction start point of a correction data, a correction end point thereof and an inclination of a correction curve thereof to be used for a picture adjustment is selected. When the positions of a correction start point and/or a correction end point of the correction data are adjusted by using a remote controller unit or the like, a mark data is superposed on the correction start point and/or the correction end point of the correction data to display a mark formed based on the mark data on the screen together with the projected pictures. Thus, the picture is adjusted by displaying the marks together with the projected pictures.

Abstract: A video signal processing apparatus includes synchronizing signal separation (31) for extracting a synchronization information of an input video signal, a reference clock signal source (32) for generating a signal having a constant period, phase synchronization control (33) which receives input with a clock signal output from the reference clock signal source and which outputs a phase-locked clock signal at a timing of outputting the synchronization information, and a memory (35) for storing a correction data used for correcting a video signal of one scanning line amount. The correction data is read out from the memory (35) based on the clock signal to process the input video signal. When a synthesized picture is projected, the correction data is a data which permits a luminance level of the video signal of each scanning line amount to be faded in and/or faded out at a start portion and/or an end portion thereof linearly or like a predetermined curve.