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 Connector Types
HDMI
stands for High Definition Multimedia Interface. It is currently the de facto interconnect standard for high definition consumer electronics devices. HDMI is a purely digital signal and while it is compatible with the digital format of DVI, it is not compatible with DVI-A or any other legacy analog format without an active converter. HDMI currently supports digital HD video up to 1080p and high resolutions multi-channel digital audio on one single cable.
DVI
stands for Digital Video Interface. It is a video only format developed by the Digital Display Working Group (DDWG) as video interface for computer displays though it was adopted for a short time by some consumer electronics manufactures and can still be seen on older model HDTV's, cable boxes and other devices. It is slowly replacing VGA as the default standard for computer video connections.
DVI connectors come in several varieties and despite its name can in certain configurations also support analog video as well as digital. However, the digital and analog portions of the signal are not interchangeable and you can not use a DVI connection to bridge between a digital and an analog signal.
VGA
stands for Video Graphics Array. It is a video format introduced by IBM. It originally gave a resolution specification of 640x480. It was later followed by SVGA (the "S" stands for super) which is 800x600. Then other formats like XGA, UGA et al. became standard with higher resolutions. Today VGA has become a generic term referring to any analog computer video signals of any resolution that use the HD15 connector. The actual signal itself is in an RGBHV format which separate out the various components of a video signal to reduce crosstalk and provide sharper images of higher resolutions. VGA connections are capable of High Definition, but not all VGA equipment will conform specifically to the resolutions defined by the consumer electronics industry for "HD."
Component Video Connections
use 3 connectors for 1 video signal. The connection is usually made with 3 bundled coax cables with RCA connectors that are color coded Red, Blue and Green. This type of connection is sometimes mistakenly called RGB, but in fact, it is actually a Y, Pr, Pb and sometimes Y, Cr, Cb, where they Y= Green and carries the horizontal and vertical sync information, Pr = Red and Pb = Blue.
Component cables are capable of supporting high definition signals up to 1080p, but are often intentionally limited to 480p by equipment manufactures in order to show favor to HDMI which allows for digital encryption and copy protection.
S-Video,
stands for separate video, is a video only signal that carries the Chromo (color) and Luma (brightness) signals on separate conduits in order to minimize signal crosstalk and provide a sharper picture. Though S-video is slightly sharper than composite, it is still only a standard definition signal (480i).
Composite Video
connections carry a video signal and usually use an RCA connector on a 75ohm coaxial cable. The connectors are usually color coded yellow and the cable is often bundled with stereo audio cables with red and white color coded connectors.
Composite signals are only capable of standard definition (480i). Though they are a little better than RF signals, Composite is considered the lowest grade of video signal for connecting devices together.
USB
stands for Universal Serial Bus. It is a serial data connection used to connect computers to peripheral devices such as printers, keyboards, cameras and many other items. Because of its high transfer speeds, it is able to transmit graphics signals using the appropriate USB graphic converter device.
DisplayPort
is a new digital video and audio connection standard designed by the Video Electronics Standards Association (VESA). It is a royalty-free technology designed primarily for the computer industry but also compatible for home theater application.
Mini-DisplayPort
is a version of DisplayPort with a more compact connector developed by Apple Computers. It is commonly found on Apple Mac Products such as the MacBook, Mac Mini and Apple Cinema Display.
Mini-DVI
is a compact version of DVI developed by Apple Computers. It precedes Mini-DisplayPort which is found on the newest products by Apple. |
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