| 摘要 |
a keyboard unit for inputting a multiscreen mode set command set by a user; a microcomputer for checking command from the keyboard unit, generating clock and data for use in multiscreen process through lines, and recognizing whether the data generated by a strobe line is valid; a controller for receiving vertical and horizontal synchronous signals of main screen and subscreen generated from a synchronous separator; an analog switch for selecting a luminance signal (Y) and chrominance signals (B-Y and R-Y) in order of R-Y→Y→Y→B-Y→Y→Y; an analog/digital converter for converting the selected luminance signal (Y) and chrominance signals (B-Y and R-Y) into digital data; a dual port memory for storing and reading a video signal digitalized in the analog/digital converter through access port-in data lines in accordance with designated multiscreen window to output corresponding video data through a serial port; first to third digital/analog converters for converting the digital data output from the dual port memory into analog signal by luminance and chrominance signal class; and a color encoder for displaying the digital signal generated from the digital/analog converters to the multiscreen. |
