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Device for detecting and recovering physical identification

A physical and detector technology, which is applied in the direction of signal processing, instrumentation, and recording information storage using self-timed codes, and can solve problems such as the inability to normally generate top and bottom signals

Inactive Publication Date: 2004-06-23
SAMSUNG ELECTRONICS CO LTD
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  • Claims
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Problems solved by technology

[0017] However, if the disc surface is abraded due to repeated recording / reproduction, or if there are various scratches on the disc surface due to user carelessness, the above-mentioned top and bottom signals cannot be normally generated.

Method used

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  • Device for detecting and recovering physical identification
  • Device for detecting and recovering physical identification
  • Device for detecting and recovering physical identification

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Embodiment Construction

[0026] refer to image 3 , Address Mark-Physical Identification (AM-PID) detector 100 searches for EFM data at the start-up part of the top / bottom signal received from a radio frequency (RF) amplifying unit (not shown), or at the PID detection window signal part, to Detect AM mode. The AM-PID detector 100 detects the AM mode in the start-up portion of the top / bottom signal immediately after the track jump or the track jump of the seek operation, and detects the AM mode in the PID detection window signal portion in a normal manner. In this embodiment, in order to detect the AM pattern, the pattern of the input EFM data is compared with the predetermined pattern previously stored in the internal register, and if the EFM data of the same pattern as the predetermined pattern is input, an AM detection indicating that AM has been detected is generated and output Signal (ADS). When AM is detected in the first header field, the AM-PID detector 100 generates an ADS at the AM position...

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Abstract

An apparatus for detecting and restoring physical identification data arranged on an optical disk, is used in an optical disk recording / reproducing system having a radio frequency amplification unit, includes a pattern detector for an address mark (AM) and a PID pattern, a PID error detecting unit, a sector counting unit, a PID window generator, and a PID continuous determining unit. The apparatus detects and restores a PID pattern of a sector physical identification data, regardless of degradation and defects of an optical disk (DVD-RAM) surface.

Description

technical field [0001] The present invention relates to an apparatus for detecting and recovering physical identification (PID) data in an optical recording / reproducing system, and in particular to an apparatus for detecting and recovering PID data of sector physical position information arranged on the surface of an optical disc . Background technique [0002] Recently, optical disc reproducing systems have been rapidly developed. In particular, the capacity to store data has become large due to the development of new optical recording media and data compression methods. Systems for searching and reproducing large amounts of data at high speed have been studied. Furthermore, a system for recording predetermined data on the surface of an optical disc and reproducing the recorded data has been introduced. Systems such as Digital Versatile Disk Read Only Memory (DVD-ROM), DVD-RAM or Compact Disk Rewritable (CD-RW) drives are good examples of optical disk recording / reproduci...

Claims

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Application Information

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IPC IPC(8): G11B20/14G11B7/004G11B7/005G11B7/007G11B20/10
CPCG11B7/00745G11B7/005G11B20/10
Inventor 吴哲均
Owner SAMSUNG ELECTRONICS CO LTD
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