A Standards Converter for Television Exchanges between Europe and North America
When television recording on 2-in. magnetic tape was widely adopted by broadcasting organisations on both sides of the Atlantic, it was realised that this constituted a major contribution towards a method of programme exchange. However, the fact that tape recording involves the storage of the video-signal wave-form rather than the corresponding picture (as in film recording) poses a further problem. Because of the differences in television standards, some method of converting the signal from one set of standards to the other becomes necessary. — A satisfactory solution to this problem has been used in Europe for several years, where three sets of scanning standards (819, 625 and 405 lines) are in use. However, the common feature of a 50 cycles per second (cps) field frequency has led to a comparatively simple conversion system, and articles have been published1-3describing the conversion problem and equipment suitable for use in such circumstances. — Further investigations have now led to the development of a converter suitable for use between standards having 50-cps and 60-cps field frequencies.
- Print ISSN
- 0361-4573
- Published
- 1961-03
- Content type
- Original Research
- DOI
- 10.5594/J16927