METHOD FOR PREVENTING CUT OF LOWER PART OF TTX

摘要

PURPOSE: A method for preventing a lower part of a teletext screen from being cut is provided to remove a cut phenomenon of the lower part of a screen by applying a vertical slope change command to a control IC from a microcomputer in case that a TTX mode is converted, and by lowering a slope of a vertical signal which displays a teletext screen. CONSTITUTION: A microcomputer(10) has a program which performs a general television and a TTX function built-in, and selects the general television and the TTX function according to a key input from the outside. A TXT decoding unit(20) separates and detects TTX data loaded to a broadcasting signal according to a performance command of the microcomputer(10). A control IC(30) separates a synchronous signal from the broadcasting signal and loads an R.G.B signal to the synchronous signal according to a video switching signal. In addition, the control IC(30) displays a teletext on a screen of a CRT(40).