Three types of video formats: VGA DVI HDMI

Source: Internet
Author: User

Home HD TVs are becoming more common, and most of these HDTV with VGA, DVI, HDMI interface. The laptop screen is too small, and most people in the office want to add a monitor. So understand the three kinds of video signal interface differences, is to choose the right display of the premise.

Method/Step
  1. In advance, the following: Three kinds of connectors have male and female pin difference, buy the wiring should pay attention to the need is male or female needle.

  2.  VGA connector: 15-pin Video interface, mainly used for old-fashioned computer output. The VGA outputs and transmits analog signals. As we all know, computer graphics produce digital signals, and the display uses digital signals as well. So the video interface using VGA is equivalent to experiencing a digital-to-analog conversion and a one-time analog-to-digital conversion. Signal loss, the display is more blurred.

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  3.  dvi interface: The DVI interface has two standard, 25-pin and 29-pin, as shown in. Intuitively, there is no difference between the two interfaces. The DVI interface transmits digital signals that can transmit large-resolution video signals. DVI is connected to the computer graphics and display without conversion, so there is no loss of signal.

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  4. HDMI interface: HDMI interface is also a digital signal transmission, so in the video quality and DVI interface transmission achieved basically the same effect. The HDMI interface is also capable of transmitting audio signals. If the display in addition to the display function, but also with the audio, the HDMI interface can simultaneously transmit computer video and audio signals to the display. HDMI has three interfaces. The main consideration is the need of the equipment. If the digital camera is small in size and requires a small interface, use Micro HDMI. Three interfaces are only different in volume and function the same.

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    END

VGA, DVI, HDMI mutual conversion instructions
    1. 1

      VGA and DVI Mutual turn: analog and digital signal conversion, video signal loss, resulting in distortion. It is best not to convert this.

    2. 2

      DVI and HDMI Mutual transfer: are digital signals, conversion will not happen is true. can be converted. However, the audio signal is automatically converted from HDMI to DVI.

      END

Precautions
    • The development experience of video interface is: Vga->dvi->hdmi.

This digest from Baidu: http://jingyan.baidu.com/article/4dc408488241bec8d846f152.html

This article is from the "Gossip, meditation" blog, please be sure to keep this source http://yanhuasanyue.blog.51cto.com/9005517/1758938

Three types of video formats: VGA DVI HDMI

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