Analysis of several major categories of video lines

AV line

This is the oldest video cable for transmitting analog video signals. Both ends are the Lotus Head (RCA head). Both the DVD player and the TV set will have such an interface. This type of cable is not required for decoration.

S terminal line

A few years ago, a video cable with better quality than the AV cable has a round interface, similar to the PS2 mouse head;

Three color difference line

Video lines with better quality than S-line cables transmit analog signals. At present, they should be the best video lines in analog signals. Newer DVD players, high-end televisions, and home projectors will all have such interfaces.

VGA cable

Is also an analog signal video cable, the most common in the computer, the signal and the color difference line have different advantages, but with the increase in the amount of video data, such as the future to transmit 1920X1080P video signal, then the color difference line will be more redundant After the resolution exceeds 1600x1200, the quality of the VGA line is slightly longer and the length is longer to cause snowflake. Why does the home theater mention the VGA cable? That's because the HTPC goes into the home theater. All projectors have VGA connectors.

DVI cable

Full name DigitalVisualInterface, the latest digital video cable, transmits all digital signals with no compression technology, and the maximum transmission speed is 8Gbps. Digital video signal lines have been supported by most manufacturers. The transmission speed of the interface is up to 8Gbps, and its interface has 24+1 (DVI -D), 24+5 (DVI-I) type, DVI-I supports simultaneous transmission of digital (DVI-D) and analog signals (VGA signals). In general, the HTPC graphics card is generally a DVI-I interface, and the LCD monitor The projector is a DVI-D connector. Although the DVI-I connector is compatible with the DVI-D connector, the DVI-I connector is not plugged into the DVI-D connector. Why? There are four more pins. But we still have a way to use a DVI-I to DVI-D converter.

HDMI cable

Full name Hi-DefinitionMultimediaInterface, digital video cable than DVI update, transmits full digital signal without compression technology, the maximum transmission speed is 3.95Gbps, HDMI also supports eight-channel 96kHz or mono 192kHz digital audio transmission in addition to transmission of video There are not many devices that support HDMI. Its interface can be converted with the DVI interface (video signal section).