UP AND DOWN CONVERTING METHOD OF OSD FOR DIGITAL TELEVISION

摘要

PURPOSE: An up and down converting method of OSD(On Screen Display) for digital television is provided to prevent a software from being modified for adjusting the OSD size, by automatically converting an OSD signal according to resolution of a monitor, before a video signal and the OSD signal performed in an MPEG(Motion Pictures Experts Group) decoder. CONSTITUTION: Digital television has an MPEG(Motion Pictures Experts Group) decoder outputting a decoded video signal and an OSD(On Screen Display) signal by mixing the two signals. An up/down converting method of OSD for the digital television converts the video signal according to resolution of a monitor, and outputs the OSD signal by mixing the signal with the video signal after converting the OSD signal. The up/down converting method comprises the steps of: setting up the resolution or storing the resolution in a storage unit; converting the video signal according to the resolution; converting the OSD signal according to the resolution of the converted video signal; applying weight to the converted OSD signal; and outputting the converted video signal and the OSD signal applied with the weight by mixing the two signals.