1, VGA interface is the most common, that is, our usual computer monitor is connected to the host. The VGA interface is a D-type interface with 15 pins, which are divided into three rows with five pins in each row. Moreover, VGA interface has strong expansibility and can be easily converted with DVI interface.
2.DVI interface: LCD interface came into being, DVI (digital video interface), that is, digital video interface. It is the interface standard of DDWG (Digital Display Working Group) introduced by Silicon Image, Intel (Intel), Compaq (Compaq), IBM, HP (Hewlett Packard), NEC and Fujitsu (Fujitsu) in 1999.
There are three types and five specifications of DVI interface. The terminal interface size is 39.5 mm×15.5438+03 mm. There are three interface forms including DVI-A, DVI-D and DVI-I. DVI-D has only digital interfaces, and DVI-I has digital and analog interfaces. At present, DVI-D is mainly used. At the same time, DVI-D and DVI-I are divided into single link and double link. What we usually see is the single-channel version, which is very expensive, so it is only available in some professional equipment, which is difficult for ordinary consumers to see.
3.HDMI interface: high-definition input
High-definition multimedia interface is a digital video/audio interface technology and a special digital interface suitable for image transmission. It can transmit audio and video signals at the same time, and the highest data transmission speed is 5Gbps. At the same time, there is no need for line number/analog or analog-to-digital conversion before signal transmission. HDMI can be combined with Broadband Digital Content Protection (HDCP) to prevent copyrighted audio-visual content from being copied without authorization. The extra space provided by HDMI can be used for future upgraded audio and video formats.
Advantages of HDMI interface HDMI can not only meet the resolution of 1080P, but also support digital audio formats such as DVD audio, and support digital audio transmission with eight channels of 96kHz or stereo 192kHz. HDMI supports EDID and DDC2B, so devices with HDMI have the characteristics of "plug and play", and the signal source and display device will automatically "negotiate" and automatically select the most suitable video/audio format.