Dynamic magnetic information storage or retrieval – Record editing
Patent
1992-10-22
1994-07-19
Hajec, Donald
Dynamic magnetic information storage or retrieval
Record editing
360 46, G11B 2702, G11B 509
Patent
active
053314751
ABSTRACT:
A four-head type magnetic recording and/or reproducing apparatus uses control pulses having two kinds of duty factors for preventing a first video head from reproducing video signals recorded by a second video head opposite to the first video head and performing the recording and reproducing of the video signals by an identical video head. An electronic splicing control for such a recording and/or reproducing apparatus includes a duty-factor changing device for setting a first and second values of the duty factors of the control pulses at the time of normally recording video signals and changing the first and second values into a third and fourth values, respectively at the time of performing the electronic splicing of video signals, in such a manner that one of the third and fourth values is nearly equal to one of the first and second values. Thereby, the electronic splicing control can fully prevent a video head from reproducing video signals recorded by another video head opposite thereto, and at the same time the electronic splicing of video signals can be well performed.
REFERENCES:
patent: 4570192 (1986-02-01), Hori
patent: 4605976 (1986-08-01), Ito et al.
patent: 4673991 (1987-06-01), Namiki et al.
Hajec Donald
Kim Won Tae C.
Victor Company of Japan Ltd.
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