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The key innovation is 'helical scan': http://en.wikipedia.org/wiki/Helical_scan http://en.wikipedia.org/wiki/Helical_scan This came along for video applicatio
by Theodores 12y ago
The key innovation is 'helical scan':
http://en.wikipedia.org/wiki/Helical_scan http://en.wikipedia.org/wiki/Helical_scan
This came along for video applications. Up until then the idea of tapes for audio or data was to put as many linear tracks on them as possible. With video some new thinking was needed, hence the helical scan. As it turned out helical scan was the future for data and audio storage too.
- cjensen 12y agoQuad recording [1] preceded helical. In Quad, the mag stripes are across the tape almost perpendicular to the tape's movement. The head spun at an insane speed -- 14,400 RPM in open air. Helical was originally invented as a lower-cost recorder. Once helical gained the ability to do slow-mo and still-frame, Quad died. https://en.wikipedia.org/wiki/Quadruplex_videotape https://en.wikipedia.org/wiki/Quadruplex_videotape