What does dvi mean?

DVI stands for "Digital Visual Interface", which means "Digital Video Interface" in Chinese. It is a video interface standard designed to transmit uncompressed digital video. There are 3 types and 5 specifications of DVI interfaces. The 3 major categories include DVI-A interface, DVI-D interface, and DVI-I interface. The 5 specifications include DVI-A, single-connection DVI-D, dual-connection DVI-D, Single connection DVI-I, dual connection DVI-I.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

The full English name of DVI is Digital Visual Interface, and the Chinese name is "Digital Video Interface".

DVI is a video interface standard designed to transmit uncompressed digital video. Widely used in display devices such as LCDs and digital projectors. This standard was developed by the Digital Display Working Group (DDWG), a forum composed of several leading manufacturers in the display industry. The DVI interface can send uncompressed digital video data to the display device. This specification is partially compatible with the HDMI standard.

The DVI interface was first initiated in 1999 by industry giants such as Silicon Image, Intel, Compaq, IBM, HP, NEC, and Fujitsu. They formed DDWG (Digital Display Working Group, Digital Display Working Group) later launched this interface standard.

Specifications of DVI interface

DVI interface has 3 types and 5 specifications, of which the 3 major categories include: DVI-Analog (DVI-A) interface, DVI-Digital (DVI-D) interface, DVI-Integrated (DVI-I) interface, 5 specifications including DVI-A (12 5), single connection DVI-D (18 1), dual Connects DVI-D (24 1), single link DVI-I (18 5), dual link DVI-I (24 5).

DVI-Analog (DVI-A) interface (12 5) only transmits analog signals, which is essentially the VGA analog transmission interface specification. When you want to connect the analog signal D-Sub connector to the DVI-I socket of the graphics card, you must use a conversion connector. The plug that the adapter connects to the graphics card is the DVI-A interface. This type of plug can also be seen in early large-screen professional CRTs.

DVI-Digital (DVI-D) interface (18 1 and 24 1) is a purely digital interface that can only transmit digital signals and is not compatible with analog signals. Therefore, DVI-D sockets have 18 or 24 digital pin jacks and 1 flat jack.

DVI-Integrated (DVI-I) interface (18 5 and 24 5) is compatible with digital and analog interfaces, so the DVI-I socket has 18 or 24 digital pins. 5 analog pin jacks (the four-pin hole and a cross flower next to it). The 4 extra lines than DVI-D are used to be compatible with traditional VGA analog signals. Based on this structure, the DVI-I socket can be plugged into DVI-I and DVI-D plugs, while the DVI-D socket can only be plugged into DVI-D plugs. DVI-I compatible analog interface does not mean that the analog signal interface D-Sub plug can be directly connected to the DVI-I socket. It must be connected through a conversion connector. Generally, graphics cards using this interface will have related conversion connectors. Considering compatibility issues, graphics cards generally use a DVI-I interface, which can be connected to an ordinary VGA interface through a conversion connector. Monitors with two DVI interfaces generally use the DVI-D type. For monitors with a DVI interface and a VGA interface, the DVI interface generally uses a DVI-I interface with analog signals.

##DVI-D Dual Channel

Maximum resolution
Interface type	Maximum resolution
VGA	2048x1536,60Hz
DVI-I single channel	1920x1200,60Hz
DVI-I dual channel	2560x1600,60Hz/1920x1080,120Hz
DVI-D Single Channel	##1920x1200,60Hz
	2560x1600,60Hz/1920x1080,120Hz

##The DVI interface is divided into single link when transmitting digital signals. and dual link (Dual Link) two methods. The transmission rate of the single-connection DVI interface is only half that of the dual-connection, which is 165MHz/s. The maximum resolution and refresh rate can only support 1920x1200,60hz. As for the dual-connection DVI interface, it supports 2560x1600, 60Hz mode, and can also support 1920x1080, 120Hz mode. To achieve 3D effects, an LCD monitor must have a refresh rate of 120Hz. Therefore, if DVI is used in a 3D solution, a DVI cable with a dual-connected DVI interface must be used. Generally speaking, if the resolution is within 1920x1200, the image quality output by both single and double connections is the same.

##DVI-D Dual ChannelDigital24 1Not convertible to VGA##DVI-ADVI-I supports digital/analog conversion interface type. If the monitor has only one DVI interface, it will be paired with DVI-I that supports both digital/analog modes. If the monitor has both DVI and VGA interfaces, use DVI-D.

Type	Signal type	Number of pins	Remarks
DVI-I Single Channel	Digital/Analog	18 5	Convertible VGA
DVI-I dual channel	Digital/Analog	24 5	Convertible VGA
DVI-D Single Channel	Digital	18 1	Non-ConvertibleVGA
Simulation	12 5	Deprecated

Comparison of advantages and disadvantages

Interface types##VGADVIFor more related knowledge, please visit the FAQ column!

Advantages	Disadvantages	Suggestions
Supports resolutions up to 2048x1536,	is susceptible to interference from other signals, the fonts are a bit blurry at high resolutions, and does not support hot swapping	To prevent the picture from being easily disturbed, use VGA at 1920x1080 resolution and within 20 inches.
The picture at high resolution is more delicate and less susceptible to signal interference	There are many types, and most DVI cables do not support resolutions above 1920x1200. Hot swapping may burn out the circuit	It is recommended to use DVI for full HD monitors. If the resolution exceeds 1920x1200 or 3D is used, a dual-channel cable is required.

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