Editing Transcoding (section)

==History==
Before the advent of semiconductors and integrated circuits, realtime resolution and frame rate transcoding between different [[Composite video|analog video]] standards was achieved by a [[Cathode-ray tube|CRT]]/[[camera tube]] combination. The CRT part does not write onto a [[phosphor]], but onto a thin, dielectric target; the camera part reads the deposited charge pattern at a different scan rate from the back side of this target.<ref>{{cite web |url=http://www.mif.pg.gda.pl/homepages/frank/sheets/201/7/7828.pdf |publisher=General Electric Corporation |title=''GEC 7828 Scan conversion tube'' data sheet |date=10 April 1961 |access-date=21 April 2017 |archive-date=26 April 2017 |archive-url=https://web.archive.org/web/20170426062159/http://www.mif.pg.gda.pl/homepages/frank/sheets/201/7/7828.pdf |url-status=live }}</ref> The setup could also be used as a [[genlock]].