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Double light beams and multiple ranks storage CD-disc

A multi-level storage, double beam technology, applied in optical record carriers, information arrangement, etc., can solve the problems of complex detection system, difficulty in mass production, difficulty in miniaturization and practicality, etc. Take the effect of speeding up

Inactive Publication Date: 2008-03-05
阮昊
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the detection system is too complicated, and it is difficult to realize miniaturization and practicality; and the process of manufacturing discs basically adopts the MEMS route, which is difficult to apply to mass production

Method used

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  • Double light beams and multiple ranks storage CD-disc

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Embodiment Construction

[0014] See Figures 1 and 2. In the dual-beam multi-stage storage disc of the embodiment of the present invention, one information pit light spot on one data unit of the original DVD disc is changed into two twin information pit light spots, the length of the information pit is L=0.4 μm, and the width of the information pit is W=0.3 μm. The twin information pit pitch is w=0.3 μm, and the track pitch is D=0.74 μm. The state of this data unit is determined by the presence or absence of these two light spots. Since the number of states is 4, the storage capacity of a data unit changes from 1 bit of DVD to 2 bits.

[0015] Its production process is as follows:

[0016] 1. Since the master encoding adopts multi-level technology, special master encoding equipment must be used, such as multi-level run-length encoding technology, and factors such as encoding efficiency and new modulation techniques must be considered. It is realized on the master disc encoding equipment.

[0017] 2....

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Abstract

The two-light-beam multi-stage storage CD is characterized in that it changes one information dent on a data unit of DVS disk into two twinborn information dents whose length is 3T-14T, the length of the shortest information dent is 0.4 mum, the width of which is 0.2-0.3 mum, the space between the twinborn information dents is 0.3-0.4 mum, the path space is 0.74 mum. Original single information dent is substituted by two thinner dents parallel arranged in arc direction, so that coding can be done according to 'there is' and 'there is not'(00,01,10,11) of the two twin dents. Advantage: raised storage capacity without changing hardware parameters, and increased reading speed.

Description

technical field [0001] The invention belongs to the field of high-density optical storage, utilizes current hardware equipment to realize high-density optical storage of red light, changes the previous binarization storage method (that is, only records two states on one data unit), and proposes a A new multi-level optical storage scheme, that is, using double beams to generate two narrow spots on the original data unit, so that four states can be stored on one data unit, thereby increasing the storage capacity of the optical disc. Considering the encoding and format, the single-sided single-layer storage capacity can reach more than 11G. Background technique [0002] The traditional ways to increase optical storage capacity are mainly to reduce the size of information symbols and increase the dimensionality of storage. But none of them changed the traditional binary storage method, that is, only two states are recorded in one data unit. Multi-level storage technology is to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B7/007
Inventor 阮昊李伟权李曹建
Owner 阮昊