Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Patent
1997-04-21
1998-09-29
Hindi, Nabil
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
G11B 700
Patent
active
058154787
ABSTRACT:
A method of driving a CD-ROM drive is provided which includes the steps of setting an initial driving speed of a disk to a predetermined N.times. speed, and measuring a length of time t required for generating a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at the predetermined N.times. speed. If it is determined that the measured CES generation time t is smaller than a first reference time t.sub.1, then the disk is played at N.times. speed. If it is determined that the CES generation time t is equal to or greater than the first reference time t.sub.1, and smaller than a second reference time t.sub.2, the disk is played at (N-2).times.speed. If it is determined that the CES generation time t is equal to or greater than an (n-1)th reference time t.sub.n-1 and smaller than an nth reference time t.sub.n after the algorithm is sequentially repeated for all reference times between t.sub.1 and t.sub.n, the disk is played at 2.times. speed. If the CES generation time t is equal to or greater than the nth reference time t.sub.n, the playing of the disk is stopped.
REFERENCES:
patent: 5528574 (1996-06-01), Takeuchi et al.
patent: 5636192 (1997-06-01), Shimizume et al.
Hindi Nabil
Samsung Electronics Co,. Ltd.
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