Method and apparatus for timing variable optical information rec

Details Method and apparatus for timing variable optical information rec Method and apparatus for timing variable optical information rec

1992-09-03

1993-06-01

Sniezek, Andrew L.

Dynamic information storage or retrieval

Signal processing by storage and subsequent retrieval

369 59, H04N 576

Patent

active

052166570

ABSTRACT:
A method and an apparatus for recording information signals on an optical information recording medium which is reversibly changeable between optically distinguishable states corresponding to an irradiating condition of a bundle of high density energy such as laser beam. The starting point of recording signals is randomly changed, and the thermal history of the recording material by the beam irradiation is averaged and the number of repetition recording times is improved. A delay circuit is provided, and reference recording gate signals are formed on the basis of format signals obtained from a recording medium, and a random delay time is set just thereafter, and the starting point of recording of recording signals is started.

REFERENCES:
patent: 4425637 (1984-01-01), Tanaka et al.
patent: 4800550 (1989-01-01), Yamauchi
patent: 4908811 (1990-03-01), Yokogawa et al.
patent: 4982396 (1991-01-01), Yasuoka et al.
"High Speed Overwritable Phase Change Optical Disk Material", Noboru Yamada et al., Japanese Journal of Applied Physics, vol. 26 (1987) Supplement 26-4, pp. 61-66.

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