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BKSTS Illustrated Dictionary of Moving Image Technology, 4th Edition by Martin Uren

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S

safe action area: An area in the centre of the active picture where action is positioned to ensure that none of it will be cut off by the overscan on a domestic television receiver. It corresponds to 90 per cent of the transmitted active picture area of a video image. See also safe title area and Appendix B.

safe area: The area within the active picture which is considered to be always visible on a domestic television receiver. See also safe action area, safe title area and Appendix B.

safe area generator (SAG): Equipment that displays lines on a monitor corresponding to safe action area, safe title area and perhaps other markings

safelight: A source of visible light in a photographic darkroom whose colour and low intensity allow unprocessed ...

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