Portable digital player
OwnerYoung-Joon Choi, Jae-Sung Jung +2inventors
InventorsYoung-Joon Choi, Jae-Sung Jung, Andy Yang, Ivan Greenberg
Life of this patent
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Abstract
A portable player may include a control unit designed to perform an instant replay operation using instant replay data stored in a nonvolatile semiconductor memory during a cold boot operation. The control unit may be designed to perform the instant replay operation without accessing a mechanical mass storage device during the cold boot operation, and the instant replay data may be loaded from a volatile work memory to the nonvolatile semiconductor memory during a power-down conversion.
Claims23
A portable player comprising:
- a control unit;
- a RAM controlled by the control unit;
- a hard disk drive controlled by the control unit to store replay data;
- and
- a NAND flash memory controlled by the control unit and including a boot code region where a boot code is stored, a code region where an application program is stored, and a playback buffer region;
- wherein the playback buffer region of the NAND flash memory stores part of the replay data from the hard disk drive;
- wherein replay data stored in the playback buffer region is loaded into the RAM for playback during a normal mode;
- wherein instant replay data stored in the RAM is stored in the NAND flash memory together with flag information indicating whether data stored in the playback buffer region of the NAND flash memory is valid during a normal/slip to power-down conversion;
- and
- wherein instant replay data stored in the NAND flash memory is loaded into the RAM to perform an instant replay operation without an initialization operation of the hard disk drive during a cold boot operation.
A method for controlling a portable player including a hard disk drive for storing replay data, the method comprising:
- loading part of the replay data stored on the hard disk drive to a playback buffer region of a flash memory;
- loading replay data from the playback buffer region to a RAM to perform a replay operation during a normal mode;
- storing instant replay data from the RAM in the flash memory;
- loading the instant replay data from the flash memory to the RAM during a cold boot operation;
- detecting whether replay data in the playback buffer region is valid;
- and
- performing an instant replay operation without initializing the hard disk drive if replay data in the playback buffer region is valid.
A portable player comprising:
- a control unit;
- a mechanical mass storage device coupled to the control unit to store replay data;
- and
- a nonvolatile semiconductor memory coupled to the control unit to store instant replay data;
- wherein the control unit is designed to perform an instant replay operation using the instant replay data in the nonvolatile semiconductor memory during a cold boot operation.
Dependencies are inferred from the claim text.