See More: What Is Network Topology? Definition, Types With Diagrams, and Selection Best Practices for 2022 What Is VGA? The DVI standard is more exclusive to specific applications in the computer space. Today, the hardware standard of choice seems to be the HDMI interface for high-definition media applications. Interestingly, DVD players from the premium segment have featured DVI output compatibility and high-quality analog component video ports. However, for a short while, it was also the preferred digital data transfer method for HDTVs and other high-end video displays for television, DVDs, and movies. DVI cables are ubiquitous among video card manufacturers, with many cards being outfitted with DVI output ports.ĭVI mainly serves as a standard for computer video interfaces today. Its specifications were an upgrade over the digital-only VESA Digital Flat Panel (DFP) format used by older flatscreens. The DVI standard was introduced as a potential replacement for the VESA Plug and Display (P&D) standard. What Is DVI?ĭVI stands for Digital Video Interface, a standard for boosting the efficiency of data transfer from modern video graphics cards and enhancing the output quality of flatscreen LCD monitors. VGA technology is still used in some devices today however, it is being replaced by newer standards. ![]() This standard encompasses various types of cables, connectors, and ports. This digital connector standard links a display device like a computer desktop to a video source, such as a CRT controller.Ĭonversely, Video Graphics Array (VGA) is an analog connection standard that links video cards and other video sources to output devices like projectors and computer monitors. To display content in 4K resolution the VGA port is not enough because its transfer rate is simply too low.Digital Visual Interface (DVI) is a video display interface initially developed by the Digital Display Working Group (DDWG), a collective organized by Intel, Compaq, Fujitsu, Silicon Image, IBM, NEC, and HP, in 1999. By using very performant graphics cards and displays, a resolution up to Full-HD, so 1920 x 1080 pixels, is possible. The VGA port was initially created for a maximum resolution of 640 x 480 pixels. For that reason the VGA interface is almost completely dead by now. By using an adapter the analogue signals can the converted into digital signals, but the image quality decreases a lot by doing so. Modern displays are nowadays dependent on digital signals, so at least in need of DVI. Many manufacturers in the consumer electronics also use the VGA interface to implement firmware updates for TV devices. Thus, tube TVs with VGA port were developed, but at first they were only able to display the standard resolutions of 640 x 400 and 640 x 480 pixels. The horizontal frequency of so-called “100 Hz TVs” (31.25 Hz) were very similar to the one in VGA monitors. ![]() But since the performance of devices in the consumer electronics increased immensely, the borders disappeared. Up until the end of the 20th century the consumer electronics and IT were strictly divided. Since the signals are transferred analogously between the graphics card and the monitor, they have to be converted so that the monitor can recognize and display them. VGA transmits the data with analogue signals on 5 wires, of which three are responsible to transfer the primary colors and two for the vertical respectively horizontal synchronization. These have less attenuation and are shielded better than the standard VGA cable, but therefore are more expensive. As an alternative there are also cables with a BNC plug on the display side. Since most of the times a socket is used, the connecting cable has to have a plug on each side. The output at the graphics card is always a socket, the input at the display can be a socket as well as a plug, anyhow the ends are always screwable. What these 15 pins are for is shown in this list. The VGA plug is a 15 pin Mini-Sub-D-plug with three terminal rows. Next to the specification for a physical interface, the VGA port also includes the classification for appropriate cables and plugs. ![]() At the same time also the VGA port, which has its name from the computer graphics standard, was launched as the successor of EGA. It specifies a certain combination of screen resolution, color depth and image refresh rate. In 1987 the company IBM released the computer graphics standard Video Graphics Array (VGA).
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