What we call the input terminal is simple to say that generally can be divided into: VGA input, DVI input, standard video input, S-video input, component video input BNC port input, such as RS232C serial.

VGA Input: VGA interface, the asymmetric distribution of the 15pin connection, it works: the memory within the image signal stored in digital format into analog analog modulation the RAMDAC years after high-frequency signal, then output to the projector imaging such a VGA signal at the input.

DVI input: DVI interface is mainly used with a digital display output function of the computer graphics card is connected to display the computer's RGB signal.

Standard video input (RCA): also known as the AV interface, usually paired white audio interface and a yellow video interface, it is usually the RCA (commonly known as RCA) to connect only need to use with Lotus head standard AV cable with the appropriate interface to connect up to.

Specific S-Video Input: S-Video full name in English called Separate Video, people began to explore a more efficient and excellent higher definition video transmission, in order to achieve better video quality, which is currently flourishing S-Video (also known as two component video interface), separate video significance of separate video signal transmission, which is in the AV interface based on the chrominance signal C and luminance signal Y separation, and then were transmitted in different channels.

Video Component Input: At present you can see some professional video workstation / editing card, professional-grade video equipment or high-end DVD machines and other appliances, the YUV YCbCr, Y / BY / BY interface identification and other markers, although the labeling method and connector shape different but refer to the color of the same kind of interface port (also known as component video interface).

BNC port input: Usually used in workstations and connect the coaxial cable connector, the standard professional video equipment input and output ports.

RS232C serial port: RS-232C standard, full name of the EIA-RS-232C standard, which the EIA on behalf of the American Electronics Industry Association, the RS representatives recommended standard, 232, identification number, C represents the RS232 (1969), before RS232B, RS232A.

This is a simple classification of the input terminals.