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Information erasing device and information erasing method

A radial direction and component technology, applied in the field of information erasing devices, can solve problems such as impossible reproduction and achieve the effect of stability

Inactive Publication Date: 2011-12-21
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] For example, in the content disclosed in Japanese Unexamined Patent Application Publication No. 62-298072, there is disclosed a method in which address information (address recording position 1a) is recorded in an area of ​​a narrow sector of the disk, and in another In a recordable optical disc in which data is recorded in an area (information recording position 1b), a dummy signal is recorded due to recording of address information corresponding to information whose reproduction has been prohibited, so that for information that has been prohibited from being reproduced, impossible to reproduce

Method used

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  • Information erasing device and information erasing method
  • Information erasing device and information erasing method
  • Information erasing device and information erasing method

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Embodiment Construction

[0029] Hereinafter, embodiments of the present disclosure will be described in the following order.

[0030] 1. Disc-shaped recording medium as object of embodiment

[0031] 2. The internal configuration of the embodiment of the information erasing device

[0032] 3. The erasing method of the first embodiment

[0033] 4. Processing sequence

[0034] 5. The erasing method of the second embodiment

[0035] 6. Processing sequence

[0036] 7. Modify the example

[0037] 1. Disc-shaped recording medium as object of embodiment

[0038] First, a disc-shaped recording medium which is the object of the embodiment will be described.

[0039] A disc-shaped recording medium targeted by the embodiment is an optical disc called a so-called BD (Blu-ray Disc: registered trademark), and is a write-once type (recordable type) optical disc in which data recording can be performed only once. Hereinafter, the disk-shaped recording medium targeted by the embodiment is referred to as an optic...

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Abstract

An information erasing device includes a recording section where recording is performed with regard to a disk-shaped recording medium, and a control section which controls the recording section so that the recording section overwrites a part of a erasing target sector so as not to overlap in a radius direction of the disk-shaped recording medium.

Description

technical field [0001] The present disclosure relates to an information erasing device and an information erasing method in which information recorded on a disc-shaped recording medium is erased, and particularly, it is suitable for application when erasing information recorded on a so-called recordable disc-shaped recording medium. Background technique [0002] As a technique for recording and reproducing digital data, for example, there are optical discs (including magneto-optical discs) such as CD (Compact Disc), MD (Mini Disc), DVD (Digital Versatile Disc), BD (Blu-ray Disc: registered trademark) etc.) as a data recording technology for recording media. An optical disc is an all-encompassing term for a disc-shaped recording medium in which readout of recorded information is performed by using a laser beam. [0003] Among optical discs, for example, there are read-only types known as CD, CD-ROM, DVD-ROM, etc. and MD, CD-R, CD-RW, DVD-R, DVD-RW, DVD+RW, A type that can r...

Claims

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Application Information

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IPC IPC(8): G11B7/0055
CPCG11B2220/2562G11B2020/10851G11B7/0062G11B2220/2537G11B7/1263G11B7/24082G11B2220/218G11B20/18G11B2220/2541
Inventor 今井贡
Owner SONY CORP