Device and method for removing synchronization head in sync on green

Abstract

The invention relates to the field of video display, in particular to a device and method for removing a synchronization head in sync on green. The device comprises a signal input module, a difference proportion operational circuit module and a signal output module; the signal input module, the difference proportion operational circuit module and the signal output module are electrically connected in sequence; the signal input module is used for inputting VGA signals containing sync on green signals and reference signals; the difference proportion operational circuit module is used for subtracting the reference signals from the VGA signals which contain the sync on green signals and are input by the signal input module; the signal output module is used for outputting a subtracting result; the reference signals are subtracted from the input VGA signals containing the sync on green signals through the difference proportion operational circuit module, the synchronization head in the sync on green is removed, green signals, travelling signals and field signals are separated, a user does not need to worry about whether a VGA display supports green synchronization or not, and the problems of abnormal display and the like are solved.

Description

technical field [0001] The invention relates to the field of video display, in particular to a device and method for removing a sync head in green sync. Background technique [0002] With the continuous development of video display, VGA is widely used in the field of video display, which basically includes five signals red, green, blue, line and field. When designing for different applications, the line and field will be occupied by other signals or the CPU itself does not have these two signals, so that the VGA output can only be in the green sync mode, that is to say, the line and field are superimposed in the green channel. The VGA output only needs three signals of red, green sync and blue. [0003] At present, the VGA output green sync mode has shortcomings. The disadvantage is that it must be equipped with a VGA monitor that supports green sync. If the signal is connected to a VGA monitor that does not support green sync, the VGA monitor will not be able to display no...

AI Technical Summary

Problems solved by technology

[0003] At present, the VGA output green sync mode has shortcomings. The disadvantage is that it must be equipped with a VGA monitor that supports green sync. If the signal is connected to a VGA monitor that does not support green sync, the VGA monitor cannot display normally, and there will be abnormal display and other phenomena;

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