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DV on magnetic tape uses helical scan, which wraps the tape around a tilted, rotating head drum with video heads mounted to it. As the drum rotates, the heads read the tape diagonally. DV, DVCAM and DVCPRO use a 21.7 mm diameter head drum at 9000 rpm. The diagonal video tracks read by the heads are 10 microns wide in DV tapes. [15] [24]
At introduction, P2 cards offered low recording capacity compared to competing, video tape-based formats (a miniDV tape holds roughly 13 GB of data, and an S-size HDCAM tape holds 50 GB). To solve this, camcorders and decks using P2 media employ multiple card slots, with the ability to span the recording over all slots.
Digital8's main rival is the consumer MiniDV format, which uses narrower tape and a correspondingly smaller cassette shell. Since both technologies share the same logical audio/video format, Digital8 can theoretically equal MiniDV or even DVCAM in A/V performance.
MiniDVD or 8 cm DVD (also "3 inch DVD") is a DVD disc with a reduced diameter of 8 centimetres (3.15 in). It has been most commonly used in camcorders due to its compact size. [1]
The Sony DCR-VX1000 was a DV camcorder released by Sony in 1995. [1] It was the first to use both the MiniDV tape format and three-CCD color processing technology—boasting twice the horizontal resolution of VHS and triple the color bandwidth of single-CCD cameras.
An upgrade would be easy, just change the HD camera, the film transport deck stayed the same. A fiber optic–based 35 mm ground glass to video chip reducer was patented and sold to a competitor. A consumer-oriented Steadicam unit designed for small mini DV cameras was added to the Steadicam line.