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Method for implementing multi-order storage, optical recording medium and method for producing the same

An optical recording medium and multi-level storage technology, which is applied in the manufacture of optical record carriers, arrangement of optical record carriers, and discrete information storage, etc., can solve the problems of difficult signal processing, insufficient use of bank changes, etc., and achieve great compatibility , Improve the effect of storage capacity and data transfer rate

Inactive Publication Date: 2009-06-10
TSINGHUA UNIV
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Problems solved by technology

[0006] The above-mentioned multi-level run-limited storage method only uses the change of the pit to realize multi-level, and does not make full use of the change of the bank; its readout signal is asymmetrical and non-DC-removed, which brings great difficulties to the subsequent signal processing. big difficulty

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  • Method for implementing multi-order storage, optical recording medium and method for producing the same
  • Method for implementing multi-order storage, optical recording medium and method for producing the same
  • Method for implementing multi-order storage, optical recording medium and method for producing the same

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Embodiment Construction

[0063] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0064] In the writing process of traditional binary run length-limited optical disc storage, a converging laser beam scans the surface of the recording material, and information is recorded by modulating the laser power. The power of the laser is modulated into at least two powers, one that can leave information symbols on the recording material, and another that cannot cause information symbols to be left on the recording material. The place where information symbols are left is called a pit, and the place where no information symbols can be left is called a shore. During the readout process, a beam of converging laser light scans the recording layer of the disc along the scanning direction during recording, and the refl...

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Abstract

The invention discloses a method for realizing multi-level storage in optical recording media, the optical recording media and a production method thereof. An odd number of sections of connected subpits and sublands are formed on a pit / land used for storing information, and a first section and a last section of the pit are formed into the subpits / sublands. The same run length obtains a plurality of reading signals to realize the multi-level storage through the following any item or the combination of the items: the lengths of the sublands / subpits obtained by decomposing the pit / land are changed; the positions of the sublands / subpits obtained by decomposing the pit / land are changed; and the number of pit-land combination sections obtained by decomposing the pit / land is changed. The invention also comprises the optical recording media adopting the method and the production method thereof. The method realizes the multi-level storage in the optical recording media without changing the prior writing and reading device of compact disk storage, which remarkably improves the storage capacity of a compact disc-read only memory and the data transmission rate, and keeps the maximum compatibility with the prior compact disk system.

Description

technical field [0001] The present invention relates to digital storage technology, and more specifically, to digital storage technology using optical recording media. Background technique [0002] Existing digital disc products convert information into binary data, and the binary data corresponds to two different physical states of the record symbol of the storage medium in a certain modulation method to realize data storage. This type of storage method is called binary storage. The current read-only optical disc storage technology adopts a binary storage method. According to the intensity of reflected light, it is judged whether the current corresponding position is "Pit" or "Land". Each recording unit Two state numbers can be recorded on it, that is, information corresponding to exactly 1 bit. [0003] Conventional binary storage optical discs all adopt a run-length-limited encoding scheme, that is, RLL (Run Length Limited, run-length limited) encoding. RLL means that ...

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Application Information

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IPC IPC(8): G11B7/013G11B7/007G11B7/26
Inventor 裴京唐毅倪屹潘龙法徐海峥熊剑平陆达
Owner TSINGHUA UNIV
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