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A scanning pattern of parallel lines that form the image projected on a cathode-ray tube of a television set or display screen.

[German, from Latin rāstrum, rake (from the resemblance of the parallel lines to a rake's path); see rēd- in Indo-European roots.]


1. (Electronics) a pattern of horizontal scanning lines traced by an electron beam, esp on a television screen
2. (Broadcasting) a pattern of horizontal scanning lines traced by an electron beam, esp on a television screen
(Computer Science) to use web-based technology to turn (a digital image) into a large picture composed of a grid of black and white dots
[C20: via German from Latin: rake, from rādere to scrape]


(ˈræs tər)

1. a pattern of scanning lines covering the area on which an image is projected on the cathode-ray tube of a TV set.
2. Computers. a set of horizontal lines composed of individual pixels, forming an image on a monitor.
[1934; < German: screen, network < Latin rāstrum toothed hoe, rake]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.raster - the rectangular formation of parallel scanning lines that guide the electron beam on a television screen or a computer monitor
video display, display - an electronic device that represents information in visual form
formation - a particular spatial arrangement
pel, picture element, pixel - (computer science) the smallest discrete component of an image or picture on a CRT screen (usually a colored dot); "the greater the number of pixels per inch the greater the resolution"
References in periodicals archive ?
Due to the growing demand for this "video in car", the fast switching of analog video in automotive infotainment applications becomes a key criteria.
The video captured by the school s decade-old analog video cameras yielded too few details to be useful especially at night when most incidents occur.
Furthermore, it offers a higher resolution compared with analog video, enabling greater clarity and the ability to perform a digital zoom with IP cameras utilizing mega-pixels.
In tests to judge the ability of field-terminated single-mode NENP connectors to reliably support high-data-rate (10 Gbps, 40 Gbps) and analog video systems in a manner equivalent to fusion-spliced, factory-manufactured connectorized pigtails, four backbone architecture scenarios were evaluated.
Users of the Access ADVANTAGE system can save over $200 per subscriber by using low power to deliver high quality analog video, compared to high power analog video systems.
The choice that needs to be made is whether to use an analog video camera or a digital model.
For example NTSC, the standard analog video format in the United States, specifies 30 frames per second.
Request for Proposals: Qualified control room video system vendor to remove and replace the existing advanced traffic management system video wall, provide a digital video management system, and upgrade the existing analog video streams to ip video.

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