Extended display identification data (EDID) is a data structure provided by a digital display to describe its capabilities to a video source (e.g. graphics card, Set-top box. It is what enables a modern personal computer to know what kinds of monitors are connected to it. EDID is defined by a standard published by the Video Electronics Standards Association (VESA). The EDID includes manufacturer name and serial number, product type, phosphor or filter type, timings supported by the display, display size, luminance data and (for digital displays only) pixel mapping data.
European Broadcasting Union, which sets European TV Standards.
Enhanced Definition TV, improved consumer compatible TV.
Enhanced Graphics Adaptor. Standard computer format consisting of 640 x 350 pixels.
Electronics Industries Association, which sets certain communication protocols (RS232).
SDI, HD-SDI, HDMI, DisplayPort or other Digital Technologies can carry variety of data along with the video data, including audio, control, or other information. These data are said to be embedded, as they travel with the primary signal from the source device to the destination.
see EMBEDDED.
Electro-Magnetic Interference, noise.
Video (TVScan) interface that converts YUV or RGB signals into encoded modulated Composite or Y/C, with no changes in the Horizontal and the vertical frequencies.
Equalization. Selective amplification (signal restoration) applied to a signal to compensate for high frequency attenuation and other distortions encountered in long lengths of cable.
Method of soft switching between 2 sources. When the first source disappears and the second one appears simultaneously on the screen, it is called the dissolve function.
A gradual fade (dissolve) to another source with an all black transition.
: Federal Communication Commission. U.S governmental agency that manages the EMI/RFI policy.
An optical fiber cable is a cable containing one or more optical fibers. Each end of the cable may be terminated with a specialized optical fiber connector to allow it to be easily connected and disconnected from transmitting and receiving equipment. The fiber optic cable allows very long distances in data communication.
An interlaced TV screen is made up of two fields, each one containing half of the scan lines needed to make one standard video frame (picture). See also FRAME (DV). Used on the Institutional and Hi-Tech Consumer markets.
Visual effect of a picture when the frame refresh rate is too slow (it also looks like a horizontal blinking line).
Video image. In an Interlaced system, 1 video picture frame is made up of 2 fields. In PAL/SECAM standard, a frame is made up of 625 horizontal lines, so 2 x 312.5 lines per field. In NTSC, a frame is made up of 525 horizontal lines, so 2 x 262.5 lines per field.
Full screen image still store / background frame. A full screen still image that can be displayed from memory in conjunction with other LAYERs.
The frame rate is how fast the video generator "rebuilds" the entire screen with a new frame. For PAL/SECAM, the frame rate is 25 Hz and the field rate is 50 Hz. For NTSC signal, it is 29,97 and 59,94 Hz. For computer signals, it is often 50 or 60 Hz. See INTERLACED.
Function for pausing on a specific frame from the live image.
Symbol: Hz. Number of cycles per second in a signal. A cycle is when a periodic signal starts with a certain value and reaches the same value the next time.
File Transfer Protocol. A protocol used to transfer files over a TCP/IP network.
Amplification of an input signal versus its output (ratio). The gain is usually in decibels (dB). Unity Gain: 0dB.
Function that gives the non-linearity response of a CRT Display.
A gateway is a point of entry or exit at which a gate may be hung. A network device that allows or controls access to another computer or network.
Synchronization method used in video equipment such as Scan Converters. It consists of using an external Master Signal (the Black Burst generator is a TV/Studio video genlock source). It enables several video sources to be cut, faded and mixed together.
In video, a “ghost” or “refections” are a replica of the transmitted image, offset in position, that is super-imposed on top of the main image on an analogue broadcast.
Electrical connection of a circuit to a point designated as having zero potential. Ground or earth may be the reference point in an electrical circuit from which other voltages are measured.
Common noise problem found in signal management caused by different ground potentials when an item is connected to several others.