Dynamic magnetic information storage or retrieval – General recording or reproducing – Signal switching
Patent
1997-11-14
1999-03-23
Psitos, Aristotelis M.
Dynamic magnetic information storage or retrieval
General recording or reproducing
Signal switching
360 62, 386 23, G11B 1514, G11B 1512, H04N 979
Patent
active
058868437
ABSTRACT:
In order to enable both reproduction of the azimuth-recorded old format and recording and reproduction of the new format of a different azimuth angle without increasing the number of heads, the number of channels of rotary transformers and the number of changeover switched, attached on a rotary drum are a head Hw1 and a head Hr1 (whose azimuth angle is -.THETA.) which are located in opposite positions apart by 180.degree., and a head Hw2 and a head Hr2 (whose azimuth angle is +.beta.) which are also located in opposite positions apart by 180.degree.. Another head Hr3 (whose azimuth angle is +.THETA.) is attached on the drum 3 in a position apart from the head Hr1 by 90.degree.. Recording of the narrow-track new format and RAW operation are done by the heads Hw1, Hw2, and reproduction of the new format is done by the heads Hr1, Hr2. Reproduction of a signal recorded in the old format is done by the heads Hr1 and Hr3.
REFERENCES:
patent: 5311375 (1994-05-01), Ikushima et al.
patent: 5412517 (1995-05-01), Fujimori
patent: 5606465 (1997-02-01), Cramer et al.
Daiba Joichi
Ozue Tadashi
Frommer William S.
Neal Regina Y.
Psitos Aristotelis M.
Sony Corporation
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