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Dictionary of Technical Terms - G
general purpose interface (GPI)
1. A parallel interconnection scheme that allows remote control of certain functions of a device. One wire per function. 2. May also refer to any non-specific interface between equipment. Usually refers to a serial connection (RS232 or RS422 format) between computer modules. A copy. A first generation copy is a copy of the master tape. A second generation copy is a copy of the first generation copy. Losses caused by copying from one videotape to another. To phase-lock the timing of one piece of equipment to another. A main facility sync pulse generator that is capable of locking to an outside source of video. A module that can phase-lock to another source of video or sync. In a television picture, a duplicate image offset from the main picture image. Gigahertz. One thousand megahertz. A general term used for a wide variety of momentary signal discontinuities, such as tears, rolls, momentary loss of picture, etc.global channel, global control
In digital picture manipulators, allows an object constructed of separate layers, each from individual channels, to be manipulated as one layer. General purpose interface. An optical fiber in which the core has a continually changing refractive index. The smallest unit size available for a particular routing system. For example the granularity of a router may be 16 x 16, meaning that additional routing capacity must be added in minimum units of 16 x 16. A standard video output of the Kadenza or Kaleidoscope system showing wire frames of Kaleidoscope transformations. This is used to aid operators in quickly building multi-layered effects. A Grass Valley video graphics system featuring dimensional video typography, designer painting, and 3D modeling and animation. Range of luminance levels from black to white. One of the three primary color signals (red, green and blue) produced by cameras and other video sources. Nickname for a brand of small screwdriver having a green handle, sometimes used for calibrating video equipment. A condition when two or more paths to ground exist and a voltage is induced unequally in these paths, causing interference, such as hum, buzz, or noise. A signal defect caused by different frequencies having differing propagation delays (delay at 1 MHz is different from delay at 5 MHz). In the television picture, delay between the chrominance and luminance components of the video signal causes an object's color to shift outside the object's outline and also causes ringing in the luminance component.We've recently redesigned our website so your bookmarked links may no longer work. Please use either the search bar at the top right of this page or select an area from one of the tabs above to find what you are looking for.
