Four head sequential switch scanning type magnetic recording/rep

Details Four head sequential switch scanning type magnetic recording/rep Four head sequential switch scanning type magnetic recording/rep

1990-11-05

1992-04-28

Envall, Jr., Roy N.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

358335, 360 70, 360 7715, H04N 5782

Patent

active

051093057

ABSTRACT:
Four heads are mounted with 90.degree. spacings between them to a rotary cylinder that rotates by 3/4 turn in each one field period of a video signal. Adjacent pairs of these heads having the 90.degree. spacing have different azimuth angles while opposing pairs of the heads having the 180.degree. spacing have mutually the same azimuth angle. A tape is wound helically in about 3/4 turn on the rotary cylinder and travelled thereon, so that the frequency of a pilot signal for tracking control to be recorded on each track with a video signal by each head is different between the tracks and the same frequency as the frequency of the pilot signal reproduced from the reproduction track in the reproducing mode is used as a reference pilot signal for tracking in the reproducing mode.

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patent: 4916554 (1990-04-01), Takahashi et al.

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