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helical scan |
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helical scan n (Electronics) (modifier) denoting a recording technique used with video tapes in which the recorded tracks on the tape are segments of a helix a helical-scan tape How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| In contrast, helical scan tape formats such as AIT, SAIT and VXA write data in much shorter tracks across the width of the tape, and therefore do not require servo tracking systems. In fact, metal particle media dominates digital data storage media today thanks to the inroads made with the first generations of 4mm DDS and 8mm helical scan data recorders when most computer tape products were based on standard ferric oxide media. All DAT products use the helical scan recording method that has been used in professional video tape recorders (VTRs) since 1956 and in home video cartridge recorders (VCRs) since 1974. |
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