Dynamic magnetic information storage or retrieval – General recording or reproducing – Signal switching
Patent
1994-03-29
1996-04-16
Kim, W. Chris
Dynamic magnetic information storage or retrieval
General recording or reproducing
Signal switching
360 351, G11B 1512, H04N 578
Patent
active
055088562
ABSTRACT:
An image signal recording and reproducing system of this invention includes an apparatus for reproducing an image signal from a recording medium on which the image signal is recorded in a recording format selected between a first recording format for forming tracks on the recording medium by recording the image signal for one picture on the recording medium and a second recording format for forming, on the recording medium, tracks greater in number than the tracks formed in the first recording format. This system has n heads each for reproducing an image signal by tracing a track on the recording medium (n: an integer greater than one), and is arranged to detect a state of reproduction performed by each of the n heads prior to a reproduction processing operation when image signals are reproduced from a plurality of tracks formed on the recording medium in the second recording format, select m heads from among the n heads in accordance with a result of detection made by the detection circuit (m: a positive integer less than n), and perform a reproduction processing operation by using the selected m heads. With this arrangement, it is possible to reproduce image signals recorded on a magnetic medium through a head having optimal characteristics from among a plurality of heads, whereby the deterioration of image quality due to nonuniformity in the characteristics of each head is prevented and the image signals can be reproduced with high quality.
REFERENCES:
patent: 3862355 (1975-01-01), Guisinger
patent: 3922669 (1975-11-01), Baldwin
patent: 4323934 (1982-04-01), Giraud
patent: 4760474 (1988-07-01), Takimoto
patent: 4796128 (1989-01-01), Takimoto
patent: 4811123 (1989-03-01), Yoshinaka
Canon Kabushiki Kaisha
Kim W. Chris
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