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Run length limited modulation coding method

A modulation and coding method and a technology of run length, which are applied in the fields of digital storage and modulation and coding, can solve the problems of low storage capacity of optical discs, and achieve the effect of increasing storage capacity.

Inactive Publication Date: 2010-12-08
POLYSTAR DIGIDISC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem to be solved by the embodiments of the present invention is to provide a run-length limited modulation and coding method for Blu-ray multi-level optical storage devices, so as to overcome the defect of low storage capacity of optical discs in the prior art

Method used

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Embodiment Construction

[0074]The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0075] A run-length-limited modulation and encoding method for a Blu-ray multi-level optical storage device of the present invention is as follows: figure 1 As shown, among them, the track pitch of the Blu-ray multi-level optical storage device is less than 0.52 microns. Firstly, the user data is subjected to error correction coding to form binary sequence data, and then the 4-bit binary sequence data is read, according to the corresponding control code table. The relationship performs data conversion, that is, a 4 / 5 conversion. The corresponding relationship of the control code code table is shown in Table 1:

[0076] Table 1

[0077] before conversion

afte...

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Abstract

The invention discloses a run length limited modulation coding method for a blue light multi-order optical storage device. The track pitch of the blue light multi-order optical storage device is less than 0.52 micron. The method comprises the following steps of: A, reading 4bit binary sequence data, and performing four fifths transform on the read data according to the corresponding relationship of control-code code tables; B, reading 3bit binary sequence data, and performing three thirds transform on the read data according to the corresponding relationship of basic-code code tables; and C, repeating the steps till the coding is finished. Under the condition that the method has good system compatibility with a common optical disk storage system, the method can improve the storage capacity of an optical disk.

Description

technical field [0001] The invention relates to the technical field of digital storage and modulation encoding, in particular to a run-length limited modulation encoding method for a Blu-ray multi-level optical storage device. Background technique [0002] Conventional Blu-ray binary storage discs all adopt the RLL (Run Length Limited, run length limited) encoding scheme. RLL means that the channel sequence stored on the optical disc satisfies the following conditions: there are at least d '0's and at most k '0's between two '1's in the sequence. The two parameters d and k specify the minimum and maximum run lengths that may appear in the sequence, respectively. The parameter d controls the maximum transmission frequency and thus may affect the intersymbol interference when the sequence is transmitted over a band-limited channel. In binary data transmission, it is usually desirable that the received signal is self-synchronizing. Synchronization is usually reproduced using...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/14H03M7/46H03M5/14
Inventor 倪屹裴京潘龙法徐海峥陆达刘海龙刘相伟
Owner POLYSTAR DIGIDISC CO LTD