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For televisions, picture-in-picture requires two independent tuners or signal sources to supply the large and the small picture. Two-tuner PiP TVs have a second tuner built in, but a single-tuner PiP TV requires an external signal source, which may be an external tuner, videocassette recorder , DVD player , or cable box .
A still from the original slow-scan television broadcast, which has since been lost to time, of the Apollo 11 moon landing. Lost television broadcasts are television programs that were not preserved after they were broadcast, rendering them permanently unavailable for both public and private viewing.
Launched in 1981 as the Electronic Program Guide, then became the Prevue Guide, then modified slightly into Prevue Channel. Purchased by TV Guide in 1999 and renamed TV Guide Channel and then became the TV Guide Network in 2007, and then shortened to TVGN in 2013, as of January 14, 2015, it is now Pop. Sci-Fi Channel NBCUniversal
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Overscan is a behaviour in certain television sets in which part of the input picture is cut off by the visible bounds of the screen. It exists because cathode-ray tube (CRT) television sets from the 1930s to the early 2000s were highly variable in how the video image was positioned within the borders of the screen.
The elements of a simple broadcast television system are: . An image source. This is the electrical signal that represents a visual image, and may be derived from a professional video camera in the case of live television, a video tape recorder for playback of recorded images, or telecine with a flying spot scanner for the transfer of motion pictures to video).
A browser's cache stores temporary website files which allows the site to load faster in future sessions. This data will be recreated every time you visit the webpage, though at times it can become corrupted.
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