Information recording device and data erasing method
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsHarumitsu MIYASHITA, Naohiro KIMURA, Kohei NAKATA
Life of this patent
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Abstract
Upon receiving an erase command for data recorded in a write-once optical disc, an information recording device corrupts data in an information area (synchronization signal in Run-in, frame synchronization signal, address information and the like), in an erased area on the optical disc, in which information necessary for synchronization of reproducing data by overwriting the data in the information area with an erasing pattern. The erased area is specified by an erase starting position and a size of data to be erased. In this way, the information recording device erases the data in the erased area.
Claims11
An information recording device capable of erasing data recorded in a write-once optical disc, comprising:
- a receiver that receives an erase command in which an erase starting position and a size of data to be erased are designated;
- an optical head that forms a recording mark to the optical disc;
- and
- a controller that controls the formation of the recording mark to the optical disc,
- wherein, upon receiving the erase command,
- the controller erase data of an erased area by overwriting data in an information area, to corrupt the data in the information area, with an erasing pattern,
- the information area including information necessary for synchronization of reproducing the data, and
- the erased area being specified by the erase starting position and size of the data to be erased on the optical disc.
A data erasing method for erasing data recorded to a write-once optical disc, the data erasing method comprising:
- receiving an erase command in which an erase starting position and a size of data to be erased are designated;
- and
- corrupting data of an information area by overwriting the data of the information area with an erasing pattern for erasing the data of an erased area,
- the information area including information necessary for synchronization of reproducing the data, and
- the erased area being specified by the erase starting position and size of the data to be erased on the optical disc.
Dependencies are inferred from the claim text.