Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1995-06-15
1997-11-11
Neyzari, Ali
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 13, G11B 1722
Patent
active
056871430
ABSTRACT:
A reproducing apparatus for reproducing an information signal from a recording medium in which a recording medium has a modulated information signal recorded thereon by one of different recording systems, includes an optical head for irradiating the recording medium with a light beam, a photoelectric detecting portion for receiving a light beam reflexed from the recording medium and for generating an electric signal as the modulated information signal in response to the received light beam, and a convertor for converting the information signal from the electric signal. The photoelectric detecting portion is arranged to generate the electric signal by different processes in the case where the modulated information signal is recorded on the recording medium by a first system and in the case where the modulated information signal is recorded on the recording medium by a second system different from the first system. The convertor includes a demodulation circuit which is commonly utilized for demodulating both modulated information signals recorded by the first and second systems.
REFERENCES:
patent: 4658146 (1987-04-01), Clements
patent: 4773053 (1988-09-01), Gottfried
Imamura Yuji
Nagashima Yoshitake
Takahashi Koji
Canon Kabushiki Kaisha
Neyzari Ali
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