Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2008-04-08
2008-04-08
Tran, Thang V. (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S275400, C369S047100
Reexamination Certificate
active
11078950
ABSTRACT:
In an optical disk of HD-DVD, data is recorded in both grooves and lands. A groove track includes its own data region called a groove (G) track address system formed therein and a land track includes its own data region called a land (L) track address system formed therein. When tracing a groove track, address information X is read from the G track address system, and also address information Y is read from the L track address system. If neither relationship X=Y or X=Y+1 is satisfied, it is determined that the address information X includes an error. Further, a groove track includes its own data region called a groove (G) track address system having a parity bit formed therein and a land track includes its own data region called a land (L) track address system having a parity bit formed therein. When tracing a groove track, address information X is read from the G track address system, and also address information Y is read from the L track address system. Even when the parity is correct, if neither relationship X=Y or X=Y+1 is satisfied, it is determined that the address information X includes an error.
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Christensen O'Connor Johnson & Kindness PLLC
TEAC Corporation
Tran Thang V.
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