VGA terminal

VGA terminal（Video Graphics Array (VGA) connector), Other names includeRGB terminal,D-sub 15, ormini D15, Is a DE-15 with 3 rows and 15 pins. The VGA terminal is usually on the computer's video card, monitor and other devices. It is used to transmit simulation signals.

VGA terminal (DE-15 / HD-15)

Although many devices still include VGA terminals, VGA usually coexists with the DVI standard, but VGA and DVI are rapidly being phased out to support newer and more compact HDMI and DisplayPort interfaces.

DE15 female socket (graphics card side)

When playing higher resolution video, the VGA transmission bandwidth is high enough, and the image quality may be reduced due to cable quality and length.

VGA only has image input, no sound input.

Digital Video Interface (DVI)

DVI-D (Single Link) connector

The full name of DVI in English is Digital Visual Interface and the Chinese name is "Digital Video Interface". It is a video interface standard designed to transmit uncompressed digital images.

View the DVI female connector from the front

Currently widely used in LCDs, digital projectors and other display devices, this specification is partially compatible with the HDMI standard.

Connector form

With different actual functions, DVI connectors are divided into three types:

DVI connector pin (cross section)

1.DVI-D(Digital digital signal; single link or dual link)

2.DVI-A(Analog signal)

3.DVI-I(Integrated hybrid; both digital and analog signals are available; single link or dual link)

Some newer DVD players, televisions (including HDTV) and projectors use the so-called "DVI / HDCP" connector. This connector is exactly the same as DVI in appearance, but the data it transmits HDCP. The protocol is encrypted to prevent illegal copying.

Today's computers equipped with DVI interface display adapters can often use the aforementioned display devices as large screens, but most display adapters manufactured before 2007 do not support HDCP, so they may be limited by copyright protection technology and cannot be resolved at the highest level. HD video content protected by HDCP.

High-quality multimedia interface (HDMI)

High-definition multimedia interface(English:High Definition Multimedia Interface, Referred to asHDMI) Is a fully digital image and sound transmission interface that can transmit uncompressed audio and video signals.

HDMI official trademark

HDMI can be used for set-top boxes, DVD players, personal computers, TV games, integrated amplifiers, digital audio and television sets.

Brief description

The emergence of HDMI replaced analog video, and the emergence of DisplayPort replaced DVI and VGA interfaces.

Type A (Receptacle) HDMI

Type A HDMI is backward compatible with the Single-link DVI-D or DVI-I interface used by most monitors and display adapters today (but does not support DVI-A), which means that the signal source using the DVI-D interface can be passed through The conversion cable drives the HDMI screen, but this conversion solution does not support audio transmission and remote control functions.

In addition, if the DVI screen without HDCP certification will not be able to watch the video data output from HDMI with HDCP encryption protection (all HDMI screens support HDCP, but most monitors with DVI interface do not support HDCP), the Type B HDMI connector will also Backward compatible with Dual-link DVI interface.