
Overscan is the term used to describe the situation when not all of a televised image is present on a viewing screen. It exists because television sets from the 1930s through the 1990s were highly variable in how the video image was positioned within the borders of the cathode ray tube (CRT) screen. The solution was to have the monitor show less t...
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http://en.wikipedia.org/wiki/Overscan

This displays a picture slightly bigger than the TV screen, such as 768x576.
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http://www.amigahistory.co.uk/o.html

The portion of a video image that lies outside a TV's visible screen area. The amount of overscan varies from model to model, but typically ranges between 5% and 10% or the total image. Some recent TVs with 'pixel-by-pixel' or 'dot-by-dot' display modes are capable of showing the full image, with no overscan. This is especially advantageous when vi...
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http://www.crutchfield.com/S-np170FLGK7y/learn/learningcenter/home/tv_gloss

The area at the edges of a television tube that is covered to hide possible video distortion. Overscan typically covers about 4 or 5 percent of the picture.
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http://www.videohelp.com/glossary?O

A video monitor condition in which the raster extends slightly beyond the physical edges of the CRT screen, cutting off the outer edges of the picture.
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http://www.zoo.co.uk/~z0001325/Glossary.html

The TV approach of bleeding the video signal off the edges of the picture display unit. When convert
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https://www.encyclo.co.uk/local/22375
No exact match found.