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Data checking device and method for high-density CD permanent information and control data area

A data detection device and data control technology, applied in the field of restoration of HFM characteristic data

Inactive Publication Date: 2007-07-04
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Although this method of using PLL is very common, since it is necessary to design a frequency corresponding to the HFM groove to be used together with the PLL used to recover the data in the data area, there is a need to additionally use all the resources for common use. Issues with required preprocessing logic

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  • Data checking device and method for high-density CD permanent information and control data area
  • Data checking device and method for high-density CD permanent information and control data area
  • Data checking device and method for high-density CD permanent information and control data area

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Embodiment Construction

[0041] Embodiments of the device and method for detecting data in the permanent information and control data areas of a high-density optical disc according to the present invention will be described in detail below with reference to the accompanying drawings. When marking the main parts of the following drawings with reference symbols, although the same structural parts are also shown in other drawings, the same parts may use the same symbols. The functions and structures that are not necessary to be described will not be described in detail here.

[0042] FIG. 6 is a block diagram of an HFM data reproducing device in a high-density optical disc including a cyclic adder according to an embodiment of the present invention.

[0043] In the above-mentioned embodiment, the HFM data reproducing device includes: in a specific area in the lead-in area of ​​the above-mentioned optical disc, the recording mode of the high-frequency modulation groove after the bi-phase modulation proces...

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Abstract

A data detecting device and method of high-density compact disc permanent information and control data area includes:, optic pick-up part which recognizes the recording mode of high-frequency modulation groove which is after the two-phase modulation and generates relative signal in location of disc leading-in area; analogue / digit converter which samples and quantizes the high-frequency modulated signal recognized; phase shifting detector which judges whether is there phase shifting based on the sign of sampled value; circulating adder which add the sampled value continuously; groove length detector which detects the length of groove mode included in the recognized high-frequency modulated signal and generates circulating value; bit detector which detects the bit row recorded in the high-frequency modulation groove when the phase shifting detector detects the phase shifting. The invention just uses simple circulating adder to regenerate the high-frequency modulated bit data of high-density compact disc.

Description

technical field [0001] The present invention relates to a data detection device and method for a permanent information and control data (PIC: Permanent Information & Control data, hereinafter referred to as PIC) area in a high-density reproduction special optical disk, especially relates to a recording / reproduction system for a high-density optical disk, using high A restoration method of HFM characteristic data in which information is recorded in the PIC area in the lead-in area of ​​a density disc by a high-frequency modulation (HFM) groove method. Background technique [0002] Recently, a new type of high-density re-recordable optical disc capable of recording and storing high-quality video data and high-quality audio data for a long period of time, the structure of a common re-recordable optical disc will be described below referring to FIGS. 1-5. Fig. 1 is a schematic diagram of the structure of an ordinary optical disc (BD-RW) capable of repeating recording; Fig. 2 is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/18G11B7/006
Inventor 郑祐哲
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI