Bnc Connector
Bnc Connector
Video Interface, you know?
There are many types of title = "Video Interface"> video interface in the life Common RF to VGA HDMI and some can transmit analog signals, some can transmit digital signals, video streaming and audio on a single line, and some transmit audio and video separately. What follows is an introduction to the subject.
1 RF
The antenna and analog Closed circuit television is used to connect radio frequency (RF) interface. As the most common video connection, which can in turn transmit video analog audio signals. RF transmit interface mixed signal encoded audio and video, the output of the circuit in the display photo by a series of mixed-signal separation coding, decoding. Because of the need for video, audio, hybrid code, the interfering signal with each other, so it's a quality print quality is the worst of all interfaces. Front cable equipment Satellite television is also commonly used RF connections but in this case, the transmission of digital signals.
2 composite video
Unlike the RF interface, which contain audio, composite video (Composite) generally use the yellow RCA connector (Lotus) connectors. "Composite" means that the analog signals that convey the brightness and color signals in the channels of the same, but if the TV can not separate these two signals, there will be a shadow.
3, S-Video
S-video connection using S / C (luminance / chrominance) separation of the production, use son of the four transmission signal, the interface is the interface with four pins. two-prong ground, the other two needles were passed on light level and chroma respectively. Because the transmission of signals luminance and chrominance, respectively, results better S-Video composite video. However, S-Video anti-jamming ability is low, if the length of the cable S-Video is preferable not more than 7 meters.
4 color
Chroma (chroma) are often labeled as Y / Pb / Pr, use red, green, blue three colors to mark each cable and interfaces. Green (Y) to transmit the luminance signal. Blue and red lead (Pb and Pr) is the signal color difference. The chromatic effect is better than S-Video, so much DVD playback high definition using the interface devices. If you use high quality thread and interfaces, even if a cable 10 meters long component cable can transmit a good idea too.
5, VGA
VGA (Video Graphics Array) has another name known as D-Sub. A pin interface VGA total of 15, which is divided into three rows, each row of five holes, is the type most often used to interface the graphics card, the vast majority of
Graphics card comes with the interface. It can transmit red, green and blue analog signals and synchronization signals (horizontal and signals vertical). Using the VGA connection device, length of cable is better not to exceed 10 meters, but also
Note that the connector is installed or not, otherwise it can cause a shadow image appears.
6 DVI
DVI (Digital Visual Interface) and VGA port on the computer interface more common, and the difference is that VGA, DVI can transmit digital signals, without having to perform various analog converter, so that the quality Image is very high. Today, many high-definition television, it also provides a DVI interface. Note that the interface DVI has a frequency range of specifications, DVI-D (digital) and DVI-I (integrated). DVI-D digital signals can be used to connect the video cards and flat screen televisions. DVI-I may share in the DVI-D and VGA.
7 HDMI
Multimedia Interface (HDMI HD) is a newly developed interface is completely digital signal transmitting the same as DVI. The difference is that HDMI can transfer not only high definition digital video signals, but can transmit audio signals at the same time high quality. It has the same function with the radio interface in the same time, but thanks to the signal all-digital, unlike the radio frequency interface that bad quality image is produced.
8 DisplayPort
DisplayPort is an interface for viewing video published by Electronics Standards Association (VESA). As the successor to DVI, DisplayPort will add support for transferring audio signal from high definition at the same time, to transmit video signals, while that support a higher resolution and refresh rate.
According to the design, supports DisplayPort external display connections, display and seamless connectivity. VESA notebook manufacturers do not just want to use DisplayPort to connect independent observers, but also use it directly connected LCD and the motherboard for easy upgrades in the notebook. For this, the DisplayPort interface is also designed to be very low, both to facilitate the use of laptops, but also allows the video card can configure the port multiple.
9, 1394
IEEE 1394, also known as FireWire or iLink, can transmit video signals and digital audio and control machines with high bandwidth and very stable. Usually, it is mainly used to connect cameras, digital video recorders DVD and other devices. There are two types of IEEE 1394 Interface 6-pin and a small hexagonal square 4-pin interface. Hex 6-pin interface can provide power connected to the device, while the 4-pin can not be squared interface.
10 BNC
BNC (coaxial cable interface card ring) interface is primarily used to connect high-end home theater and professional video equipment. BNC connectors are five to receive red, green, blue, horizontal sync and vertical sync signal. BNC connector allows the video signal to reduce interference between them can obtain better signal-response effect. In addition, the interface to connect BNC very difficult because of the special design, do not worry about bad connection from loosening of the interface.
About the Author
http://replacementbatteries.blogspot.com/2010/03/video-interface-how-much-do-you-know.html
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