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| | Videotape - Wikipedia, the free encyclopedia |
 | | In virtually all cases, a helical scan video head rotates against the moving tape to record the data in two dimensions, because video signals have a very high bandwidth, and static heads would require extremely high tape speeds. |
 | | Video tape is used in both video tape recorders (VTRs or, more common, video cassette recorders (VCRs)) and video cameras. |
 | | The first domestic videocassette recorders were launched in the early 1970s, but it was not until the Japanese systems, Sony's Beta (1975) and JVC's VHS, were launched, that videotape moved into the mass market, resulting in what came to be known as the "format wars". |
| en.wikipedia.org /wiki/Video_tape (1001 words) |
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