Method and apparatus for accessing a disc

A technology for accessing records and accessing data, applied to optical discs, rewritable optical discs, write-once optical discs, etc.

Inactive Publication Date: 2009-05-27
KONINKLIJKE PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Of course, because the state change of the photosensitive layer in a BD-R disc is irrevers

Method used

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  • Method and apparatus for accessing a disc
  • Method and apparatus for accessing a disc
  • Method and apparatus for accessing a disc

Examples

Experimental program
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Embodiment Construction

[0024] Figure 1a A device is shown for accessing a record carrier, which may be of the ROM, recordable or rewritable type. A record carrier 10 which may be selected from a set 11 of rewritable type record carriers, or from a set 12 of recordable type record carriers, or even from a set 13 of ROM type record carriers, is inserted into the device 14 . The device comprises an identification unit 15 for determining the type of record carrier 10, ie ROM, recordable or rewritable. Once the type has been determined, this information is passed to the access control unit 16 which regulates access to the record carrier according to the type of the record carrier. This means firstly that, for a given type of record carrier, only those accesses which are physically compatible with the given type must be allowed: for ROM only read access; for recordable types read and write; for recordable The rewrite types are read, write, and erase. The reason why write access must not be performed on...

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PUM

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Abstract

A record carrier of rewritable type, such as a BD-RE, is operable to perform multiple write operations. Optionally, such a record carrier can nevertheless be treated as a one time recordable record carrier, opening new opportunities for the users, like for example offering a level of protection of user-data therein recorded against unintentional subsequent erasure. The apparatus and method according to the invention enable the logical formatting of the BD-RE disc as a BD Write Once disc.

Description

technical field [0001] The invention relates to a method of accessing a record carrier, which may be of the recordable or rewritable type, comprising: [0002] --- Receive the record carrier; [0003] --- determine the type of record carrier; and [0004] --- Adjust access to the record carrier according to the type of record carrier. [0005] The invention also relates to a device for accessing a record carrier, which may be of the recordable or rewritable type, comprising: [0006] --- receiving unit receiving the record carrier; [0007] --- Determine the identification unit of the record carrier type; and [0008] --- An access control unit that regulates access to the record carrier according to the type of record carrier. Background technique [0009] A record carrier such as an optical disc may carry pre-recorded information, i.e. be read-only to the user, or be recordable by the user; in particular, a user-recordable record carrier may be multi-recordable, herei...

Claims

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Application Information

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IPC IPC(8): G11B20/12G11B27/10G11B27/32
CPCG11B2220/2537G11B27/105G11B20/1217G11B2220/218G11B27/329G11B2220/216G11B2220/2541G11B19/12G11B27/10G11B27/32
Inventor W·F·范德维克特
Owner KONINKLIJKE PHILIPS ELECTRONICS NV
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