The Videomelter
The switching techniques that are generally used in television for changing from one scene or picture to another involve either the abrupt switching of the video signals or else the application of the “dissolve” or “wipe” modes of switching. The NHK has evolved a new method of switching called the “videomelter” that enables switching sequentially from different tonal levels between the brightest and the darkest parts of the picture or scene, or from the half-tone (mid-tone) part of the scene that is to follow. The term “videomelter” is used because the picture on the screen, as it is being switched over to the following scene, gives the impression of eroding or melting. The technique has been used very successfully in various program productions with good effect and excellent results. An outline of the working of the equipment developed for this purpose is described, and some examples of its application for other uses are noted.
- Print ISSN
- 0036-1682
- Published
- 1978-11
- Content type
- Original Research
- DOI
- 10.5594/J10477