Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1995-06-15
1997-01-07
Dinh, Tan
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
369 58, G11B 390, G11B 2736
Patent
active
055924514
ABSTRACT:
A test signal is recorded on a first recording disk according to a constant linear velocity technique. The test signal is reproduced from the first recording disk. A quality of the reproduced test signal is evaluated as a function of a position on the first recording disk. An information signal is recorded on a second recording disk having first and second areas. A degree of deterioration in record quality in the first area is greater than a degree of deterioration in record quality in the second area. A recording density in the recording of the information signal on the first area is decreased below a recording density in the recording of the information signal on the second area. A degree of the decrease in the recording density is changed as a function of a position on the second recording disk in response to the evaluated quality.
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patent: 5483513 (1996-01-01), Fuji
patent: 5513160 (1996-04-01), Satoh et al.
patent: 5530687 (1996-06-01), Yamaguchi
patent: 5537381 (1996-07-01), Fuji
Dinh Tan
Victor Company of Japan Ltd.
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