Dynamic magnetic information storage or retrieval – Record editing
Patent
1983-05-06
1986-07-22
Cardillo, Raymond F.
Dynamic magnetic information storage or retrieval
Record editing
360 142, 360 70, G11B 502, G11B 2728, G11B 2730
Patent
active
046022988
ABSTRACT:
In a video tape recorder of the helical scan type having a pair of heads mounted on diametrically opposite positions of a rotary cylinder, a pilot signal is recorded through the heads on the same track with video signal during recording and edit modes. During "insert" edit modes, the video heads are alternately switched between playback and recording modes in synchronism with each half revolution of the cylinder. A tape is wound over an arcuate extent greater than a semicircle of the circumference on the cylinder so that the video heads are simultaneously in contact with the tape at different positions to record a video signal over a major portion of the track and record a pilot signal over the full length of the track. One of the heads is in a recording mode and tracing the major portion of a given track, while the other head is in a playback mode tracing a minor portion of a subsequent track where the prerecorded pilot signal is present. A tracking signal is derived from the prerecorded pilot signal.
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Nishitani Yasuo
Yano Osahiko
Cardillo Raymond F.
Matsushita Electric - Industrial Co., Ltd.
Young Wayne
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