![]() How Important Is EDID Emulation And That KVM Switches Support EDID If one or more connections in the chain does not support DDC, the display could show the wrong colors, size or position, or it might show nothing at all. For EDID information to be available at the source, all your display device connections must support DDC-including your extenders, switches, cables, splitters, amplifiers, repeaters and converters. ![]() With EDID providing the display information and DDC providing the physical link between the display and the source, the two accompanying standards enable a plug-and-play experience for information exchange between display and source. How Is EDID Data Exchanged? The Relation Between EDID And DDCĮDID is transmitted between the source device and the display through a display data channel, or DDC, which is a collection of digital communication protocols created by the Video Electronics Standards Association (VESA). If a monitor is directly attached to a graphic adapter card the only concern is to have a connection cable that supports DDC transmission (VGA: pins 12 an 15 need to be connected). Optimum resolutions and maximum resolutions as well as Gamma values part of this protocol. This data exchange is for identification of the attached screens and to read their video specifications mainly. While DDC is just the description of the interface, the true data that is exchanged between graphic adapter card and monitor is called EDID (Extended Display Information Data). What Is DDC (Display Data Channel)?ĭDC (Display Data Channel) is a defined Standard by VESA. Additionally, HDTV receivers, DVD and Blu-Ray players, LCD displays and digital TVs can read EDID and output the required video format. EDID is often used with a computer graphics card as the source device. ![]() Once the source receives this information, it can then generate the necessary video characteristics to match the needs of the display. What Is EDID (Extended Display Identification Data) And Why Is It Important?ĮDID is a VESA standard data format that contains information about the display’s manufacturer, screen size, native resolution, color characteristics, frequency range limits and more. EDID, or extended display identification data, is the data structure your display uses for this communication. What Are EDID Emulators And How They Help AV Signal Distributionįor your display screen, TV or projector to show the best picture possible, it must be able to communicate its capabilities with the video source.
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