Optical disk system for recording and reproducing a mini disk an

Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval

Patent

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369124, 369 34, 369 54, G11B 700

Patent

active

055463690

ABSTRACT:
In an optical disk recording and reproducing apparatus, audio data compressed in MD format can be recorded on a CD-sized optical disk and can be reproduced from both mini disks and compact disks. A disk for reproducing, in which audio data compressed in MD format is recorded by forming pits on a CD-sized polycarbonate substrate, enjoys a long play back time.

REFERENCES:
patent: 5412628 (1995-05-01), Yamazaki et al.
patent: 5485447 (1996-01-01), Minoda

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