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TV ability to enlarge and lose edges of the picture
Answer for the clue "TV ability to enlarge and lose edges of the picture ", 8 letters:
overscan
Word definitions for overscan in dictionaries
Wiktionary
Word definitions in Wiktionary
n. (context television English) The additional area around the four edges of a video image that is not normally seen by the viewer.
Wikipedia
Word definitions in Wikipedia
Overscan is the situation in which not all of a televised image is present on a viewing screen. It exists because cathode ray tube (CRT) television sets from the 1930s through to the early-2000s were highly variable in how the video image was positioned ...