What Is The Difference Between Industrial Computer's VGA, DVI And HDMI?

- Mar 11, 2020-

The VGA interface transmits analog signals. The digital signals in the industrial computer are first converted into analog signals and sent to the display. The analog signals are converted into digital signals by the display to form a picture to show in front of everyone. The signal is lost during the data conversion Although some screens can be repaired by software, the higher the resolution of the monitor, the more blurred the screen becomes.


The DVI interface transmits digital signals and can transmit large-resolution video signals. DVI does not need to be converted when connecting industrial computer graphics and monitors, and the signal is not lost.

The HDMI interface also transmits digital signals, which can simultaneously transmit digital video signals and digital audio signals. The HDMI interface is a new interface to terminate the previous audio and video separation transmission. Its maximum transmission speed can reach 5Gb / s. In addition to image data, it can simultaneously transmit up to 8-channel audio signals. This kind of non-compressed digital data transmission can effectively reduce signal interference and attenuation caused by digital / type conversion.

VGA, DVI, HDMI mutual conversion instructions

1. VGA and DVI conversion: conversion of analog signals and digital signals, loss of video signals, resulting in distortion.

2. DVI and HDMI conversion: HDMI is derived from DVI interface technology and is a digital signal that can be converted. However, when converting from HDMI to DVI, the audio signal is automatically discarded.