Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Reexamination Certificate
2006-06-06
2006-06-06
Dinh, Tan (Department: 2653)
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
C369S030040, C369S275300
Reexamination Certificate
active
07057980
ABSTRACT:
A method and device for recording information blocks on a record carrier is described. The device has control means20for recording and retrieving position data indicative of the position of the recorded information blocks. The control means include a mapping unit31for determining in which region the information block is recorded and a detection unit32. The region is one of a number of consecutive regions constituting the recordable area. The mapping unit records a random signal unit in a unit location in a mapping area. The unit location indicates region, and the unit length of the random signal unit is smaller then the length of information block. The detection unit32detects the presence of the recorded random signal units in mapping area and so determines if a region contains at least one information block. The highest written address is found by detecting the highest written unit location in the mapping area, and subsequently searching region for the presence of recorded marks.
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Bakx Johannus Leopoldus
Brondijk Robert Albertus
Dinh Tan
Goodman Edward W.
Koninklijke Philips Electronics , N.V.
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