Video signal processing apparatus and synthesized-picture projecting apparatus

摘要

A video signal processing apparatus includes a synchronizing signal separation means (31) for extracting synchronization information from an input video signal, a reference clock signal source (32) for generating a signal having a constant period, a phase synchronization control means (33) which receives a clock signal 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 means (35) for storing correction data used for correcting a video signal of one scanning line amount. The correction data is read out from the memory means (35) based on the clock signal to process the input video signal. When a synthesized picture is projected, the correction data 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.