Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Patent
1987-03-31
1989-07-18
Faber, Alan
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
360 57, 360 331, G11B 509, G11B 5024, H04N 5781
Patent
active
048498327
ABSTRACT:
An erasing device for a magnetic video recorder is disclosed which includes a means for reproducing a code signal and a video signal from a magnetic medium. The code signal is discriminated to decide whether the video signal is a field video signal or a frame video signal. When the video signal is discriminated to be the frame video signal, the erasing device erases the video signal over a broader range than when the video signal is discriminated to be a field video signal.
REFERENCES:
patent: 3397283 (1968-08-01), Strosberg et al.
patent: 3723668 (1973-03-01), Ritchey, Jr.
patent: 4005483 (1977-01-01), Kuwano
patent: 4038692 (1977-07-01), Umeda et al.
patent: 4686661 (1987-08-01), Isaka
IBM Technical Disclosure Bulletin, "Variable Length Erasure on Write Error Recovery", Scully et al, vol. 11, No. 5, Oct. 1968.
Ogura Tokihiko
Suzuki Yasutomo
Takei Masahiro
Yamagata Shigeo
Canon Kabushiki Kaisha
Faber Alan
Fournier Kevin J.
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