Dynamic information storage or retrieval – Control of storage or retrieval operation by a control... – Control of information signal processing channel
Reexamination Certificate
2007-09-11
2007-09-11
Edun, Muhammad (Department: 2627)
Dynamic information storage or retrieval
Control of storage or retrieval operation by a control...
Control of information signal processing channel
C369S047500, C369S047100, C369S053100
Reexamination Certificate
active
10542138
ABSTRACT:
A device for scanning a record carrier has a head for scanning a track for reading and/or writing information. A disc scheduler controls receiving requests for accessing the record carrier, the requests including streaming requests regarding real time information and auxiliary requests (44) regarding auxiliary information. The disc scheduler reduces power consumption of the device by switching the scanning means to a stand-by mode when no requests are pending and switching the scanning means to an operational mode when a request has to be executed. The auxiliary requests are executed in a processing interval (45) in combination with a selected one of the streaming requests. Hence the number of spin-ups of the record carrier is reduced.
REFERENCES:
patent: 5442608 (1995-08-01), Umeda et al.
patent: 6496456 (2002-12-01), Ueki
patent: WO 01/82301 (2001-11-01), None
patent: WO 01/82301 (2001-11-01), None
Korst Johannes Henricus Maria
Van Gassel Jozef Pieter
Wijnands Rudi Jozef Marie
Belk Michael E.
Edun Muhammad
Koninklijke Philips Electronics , N.V.
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