Dynamic information storage or retrieval – Specific detail of information handling portion of system – Radiation beam modification of or by storage medium
Patent
1994-09-16
1996-01-09
Ben, Loha
Dynamic information storage or retrieval
Specific detail of information handling portion of system
Radiation beam modification of or by storage medium
369 32, 369 4434, 369 4437, 369 48, 360 65, 358328, G11B 700
Patent
active
054835151
ABSTRACT:
A system is disclosed for canceling cross-talk in a data read signal from an optical data storage medium. The system includes three AD converters for receiving read signals from three read sensors, and the read signals respectively represent data from a center data track and its two adjacent side data tracks on an optical data storage disk. The digitized signals are sent to a skew compensator to remove time skew between the signals. Then, the amplitudes represented by the side track signals are adjusted, and the adjusted side track signals are subtracted from the center track signal to cancel cross-talk in the center track signal which is attributable to data contained in the side data tracks. The center track signal is then equalized to account for the frequency response of the center track read sensor.
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Cheng David C.
Hurst, Jr. Jerry E.
Olson Radley W.
Thompson David A.
Ben Loha
International Business Machines - Corporation
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