Recognize several video interface standards---selfless dedication edition

Vga,dvi and HDMI are three video transmission standards, resulting in three interfaces based on three standards. So they are the standard name is also the interface name. It's often seen on our computers and TV devices. Even some graphics cards and monitors coexist on three interfaces.

Everyone to three nouns is not unfamiliar, especially VGA is familiar, but for DVI and HDMI although heard but not necessarily seen.

I believe most of the monitors and hosts in the home are connected to the VGA data cable. The VGA (video Graphics Array, also known as D-Sub port) transmits an analog video signal. The first bulky square CRT display can only accept analog signals, so the computer will convert the digital video signal into analog signal and transmit it to CRT monitor via VGA interface and data cable. And for the now popular LCD LCD display, it accepts digital signals, so VGA to the display side also need to convert analog signal to digital signal line. In this way, the signal is lost, so the analog signal will be more than the 1280x1024 resolution above the case of a significant error, the higher the resolution is more serious.

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VGA Data cable

DVI (Digital Visual Interface) transmits the signal directly. Directly to the computer's digital video signal to the display, the middle no longer converted to analog signals, the signal is not too much wear. However, in the 1024x768 resolution, DVI and VGA difficult to identify their differences, this is why DVI becomes a common low-end display of the chicken configuration. However, in the 1024x768 resolution above the effect of obvious advantages, in the current high-definition display and high-definition video into the mainstream era, DVI replacement VGA will be the trend.

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DVI Data Cable

HDMI (High Definition multimedia Interface) is often referred to as the HD multimedia interface, is the end of the past video separation transmission of the new interface, its theoretical maximum transmission speed of GB/s, in addition to image data, can simultaneously transmit up to 8 channels of audio signal. That means you can transfer video and sound with an HDMI cable. HDMI originates from the DVI technology, which is why the HDMI interface and the DVI interface can be converted to each other through the adapter. And HDMI interface is divided into a-type, C-type, D-type three kinds.

HDMI A-type interface: Mainly used in high-definition TV, projector and other equipment, the width is about 14mm.

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HDMI Type a interface data cable

HDMI C-type interface: Mainly used in tablet computers, MP4 and other devices, the width is about 10.5mm.

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HDMI C-type interface data cable

HDMI D-type interface: Mainly used in smartphones, tablet computers and other devices, the width is about 6mm.

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HDMI D-type Interface data cable

This article is from the "Guo Yong Technology blog" blog, make sure to keep this source http://guoyong.blog.51cto.com/408495/1744380

Recognize several video interface standards---selfless dedication edition