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US 6,310,848 B1Granted
Power saving system for optical disc recording/reproducing apparatus
AssigneeVictor Company of Japan, Ltd.
InventorYasuhiro Ueki
Life of this patent
Estimating the term…
Abstract
A power saving system of an optical recording/reproducing apparatus is provided. The optical recording/reproducing apparatus includes a temporal memory which stores reproduced data or recording data in a cyclic data storage stage and from which the stored data is read out for reproduction or recording in a cyclic data readout stage following the data storage stage. The power saving system saves part of power consumed in the apparatus in the data storage stage in a record mode of operation and in the data readout stage in a reproduce mode of operation.
Claims8
An optical reproducing apparatus comprising:
- an error correcting circuit which subjects data reproduced from an optical disc to error correction;
- a temporal memory which stores the data corrected in error by said error correcting circuit in a data storage stage;
- a data storage monitoring circuit which monitors the amount of the data stored in said temporal memory and provides a signal indicative thereof;
- a reproducing circuit which reads the data out of said temporal memory in a data readout stage following the data storage stage and outputs the data for reproduction;
- and
- a power saving circuit which is responsive to the signal from said data storage monitoring circuit to save power supplied to at least said error correcting circuit during a time interval in which the amount of the data stored in said temporal decreases from a first level to a second level in the data readout stage.
3 more elements
An optical reproducing apparatus comprising:
- a first control circuit which controls rotation of an optical disc in a first servo control mode based on a speed control signal derived from a drive circuit rotating the optical disc;
- a second control circuit which controls rotation of the optical disc in a second servo control mode based on a speed control signal derived from data reproduced from the optical disc;
- a driver circuit which drives a pickup reading the data out of the optical disc;
- a playback/servo circuit which produces a data signal for playback and a servo error signal from on the data picked up by the pickup;
- a focus control circuit which subjects the pickup to focus control;
- a tracking control circuit which subjects the pickup to tracking control;
- an error correcting circuit which subjects the data read out by the pickup to error correction;
- a temporal memory which stores the data corrected in error by said error correcting circuit in a data storage stage;
- a data storage monitoring circuit which monitors the amount of the data stored in said temporal memory and provides a signal indicative thereof;
- a reproducing circuit which reads the data out of said temporal memory in a data readout stage following the data storage stage and outputs the data for reproduction;
- and
- a controlling circuit which is responsive to the signal from said data storage monitoring circuit to save power supplied to at least said error correcting circuit during a time interval in which the amount of the data stored in said temporal decreases from a first level to a second level in the data readout stage, said controlling circuit switching control of the rotation of the optical disc from the second servo control mode to the first servo control mode.
9 more elements
An optical reproducing apparatus comprising:
- a driver circuit which drives a pickup reading data out of the optical disc;
- a playback/servo circuit which produces a data signal for playback and a servo error signal from on the data picked up by the pickup;
- a servo circuit which provides a servo signal to said driver circuit based on the servo error signal from said playback/servo circuit;
- an error correcting circuit which subjects the data read out by the pickup to error correction;
- a temporal memory which stores the data corrected in error by said error correcting circuit in a data storage stage;
- a data storage monitoring circuit which monitors the amount of the data stored in said temporal memory and provides a signal indicative thereof;
- a reproducing circuit which reads the data out of said temporal memory in a data readout stage following the data storage stage and outputs the data for reproduction;
- and
- a power saving circuit which is responsive to the signal from said data storage monitoring circuit to save power supplied to at least one of said drive circuit, said playback/servo circuit, and said error correcting circuit during a time interval in which the amount of the data stored in said temporal decreases from a first level to a second level in the data readout stage.
6 more elements
Dependencies are inferred from the claim text.