Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1996-01-05
1998-12-29
Tran, Thang V.
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
369 54, G11B 700
Patent
active
058547797
ABSTRACT:
The present invention is a system for reading a CD having a surface with a multiple level data track including a laser, a focusing and positioning system configured in a way which causes the laser to follow the multiple level data track, a detector which converts the light which is reflected from the data track to an electrical signal, a digital signal processing unit configured to receive the electrical signal including a scaling-function generator for determining a plurality of signal windows from the electrical signal, and a multiple level analog to digital converter which determines a data level based on the signal windows and the electrical signal whereby multiple data levels may be read from the CD.
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Johnson Bruce V.
McDermott Gregory A.
O'Neill Michael P.
Pietrzyk Cezary
Spielman Steven
Calimetrics
Tran Thang V.
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