Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2006-08-08
2006-08-08
Young, Wayne (Department: 2656)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S300000, C369S047210
Reexamination Certificate
active
07088661
ABSTRACT:
A disk medium, an information recording device, and an information reproducing device are provided, which are capable of efficiently recording sub-information such as security data and, if the sub-information is set as the security information, enhancing a security performance. The disk is divided into a plurality of zones in radial directions. A logical zone count in each zone is obtained by dividing a total recordable frame count in each zone by a frame count in a unit logical zone. For example, a logical zone count N1z in a zone i is given by:in-line-formulae description="In-line Formulae" end="lead"?N1z=Fzi/F1zin-line-formulae description="In-line Formulae" end="tail"?where Fzi is the total frame count in the zone i, and F1z is a frame count in the logical zone. However, a value given by the formula (1) is not always an integer depending on the zone, and there might exist a frame (gap region) not used for the logical zone. Accordingly, the security data are recorded in this gap region.
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Izumi Hiroaki
Kobayashi Sinji
Suzuki Yoshihisa
Tanaka Sayoko
Armstrong Kratz Quintos Hanson & Brooks, LLP
Criado Jorge L. Ortiz
Sanyo Electric Corp., Ltd.
Young Wayne
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