KR940027524A - Character Dubbing Device of Video Equipment - Google Patents

Abstract

The present invention relates to a character dubbing apparatus that can dub a complementary color or a character close to the complementary color according to the background color of a screen in a video device, so that the dubbed character can be clearly read. A synchronization separator for separating horizontal and vertical synchronization signals corresponding to lines and points to be dubbed, a phase detector for detecting a background color by detecting a phase of a color signal detected from the composite video signal, and the horizontal and vertical synchronization A microcomputer for controlling the entire device operation according to the signal and the phase, a phase delay unit for determining a complementary color for the background color by delaying a phase of the burst signal detected from the composite video signal for a predetermined time, and a character input from the microcomputer A character having a complementary color according to a control signal and a burst signal delayed in the phase delay unit Brutal signal generator for outputting a call is accomplished by comprising a.

Description

Character Dubbing Device of Video Equipment

Since this is an open matter, no full text was included.

2 is a block diagram of the character dubbing device of the video device of the present invention, and FIG. 3 is an input and output waveform diagram of FIG. 2, (a) is a composite video signal waveform diagram, (b) is a color signal waveform diagram, (C) is a waveform diagram of a gate pulse control signal, (D) and (E) are a burst signal and an extended burst signal waveform, respectively. 4 is an embodiment of a predetermined position display implemented by FIG.

Claims (3)

Burst detection means for detecting a burst signal in a composite video signal input from the outside according to an external gate pulse control signal, a phase of a color signal input from a band pass filter in accordance with an external line control signal, and a burst output from the burst detection means Phase detection means for detecting a phase difference by comparing the phases of the signals, analog / digital conversion means for converting the analog phase difference output from the phase detection means into a digital phase signal, and a phase signal output from the analog / digital conversion means; A microcomputer for controlling the overall operation of the apparatus according to the horizontal and vertical synchronization signals inputted from the synchronization separating means, phase delay means for delaying a phase of the burst signal input from the burst detection means according to the phase control signal of the microcomputer for a predetermined time; Character system input from the micom A text signal generating means for generating a text signal according to the signal and the burst signal output from the phase delay means, and a multiplexer for switching the text signal and the composite video signal output from the text signal generating means to a screen of a video device. Character dubbing device of a video device, characterized in that it comprises a. The burst detection means according to claim 1, further comprising: burst separation means for separating a burst signal from a complex video signal input from the outside according to the gate pulse control signal of the microcomputer, and extending the burst signal output from the burst separation means by a predetermined level. Characteristic dubbing apparatus for a video apparatus, characterized in that configured as a burst expansion means for outputting. The apparatus of claim 1 or 2, wherein the burst detection means is replaced with an external oscillation means for outputting an oscillation signal of a predetermined frequency. ※ Note: This is to be disclosed by the original application.