GAIN ADJUSTING DEVICE FOR VIDEO SIGNAL OF A MULTIMEDIA SYSTEM AND GAIN ADJUSTING METHOD THEREOF

摘要

PURPOSE: A gain adjusting device for a video signal of a multimedia system and a gain adjusting method thereof are provided to adjust gains of an output and an input signals while displaying data outputted from a PC main body for displaying the same image. CONSTITUTION: A gain adjusting device for a video signal of a multimedia system comprises: a switching unit(210) switching over for connecting a line to a specific PC main body among plural PC main bodies according to a controlling signal inputted from a micro computer; a video signal output unit(220) outputting a video signal inputted from the PC main body; a gain adjusting unit(230) adjusting the gain of the video signal; and an OSD unit(250) outputting an OSD character signal to a video amplifier(240).