Dynamic information storage or retrieval – Binary pulse train information signal
Reexamination Certificate
2007-01-19
2010-12-07
Young, Wayne R (Department: 2627)
Dynamic information storage or retrieval
Binary pulse train information signal
C369S059170, C369S059230
Reexamination Certificate
active
07848200
ABSTRACT:
A method of reproducing multilevel information using a light spot. The multilevel information is recorded by defining virtual cells at regular intervals on tracks of an optical information recording medium and varying sizes of information pits in the cells. The method includes the steps of obtaining cell boundary values, each of the cell boundary values being obtained by performing sampling when the center of the light spot reaches a boundary between adjacent cells, calculating cell boundary value metrics on the basis of the cell boundary values and prestored reference values for the cell boundary values, calculating path metrics on the basis of the cell boundary value metrics, selecting a path metric having a minimum value of the path metrics, and reproducing the multilevel information on the basis of the path metric having the minimum value of the path metrics.
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Okamoto Kaoru
Sumioka Jun
Yamamoto Masakuni
Adams Carl
Canon Kabushiki Kaisha
Fitzpatrick ,Cella, Harper & Scinto
Young Wayne R
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