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Encoding apparatus and method, recording apparatus and method, and decoding apparatus and method

A coding device and coding technology, applied in data recording, recording signal processing, disc-shaped record carrier, etc., can solve problems such as adverse effects, achieve stable playback, realize decoding, and achieve the effect of no error propagation

Inactive Publication Date: 2012-01-18
SONY GRP CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0026] At this time, if the servo laser light reaches the bulk layer 102, mark recording performed in the bulk layer 102 may be adversely affected

Method used

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  • Encoding apparatus and method, recording apparatus and method, and decoding apparatus and method
  • Encoding apparatus and method, recording apparatus and method, and decoding apparatus and method
  • Encoding apparatus and method, recording apparatus and method, and decoding apparatus and method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0092] 1-1. Configuration of recording / reproducing device and optical recording medium

[0093] 1-2. Example of code table

[0094] 1-3. Comparison example

[0095] 1-4. Coding with sparse control according to the embodiment

[0096] 1-5. Decoding processing

[0097] 1-6. Effects produced by encoding according to the first embodiment

[0098] 2. The second embodiment

[0099] 2-1. Example of code table

[0100] 2-2. Effects produced by encoding according to the second embodiment

no. 3 example

[0102] 3-1. Example of code table

[0103] 3-2. Effects produced by encoding according to the third embodiment

[0104] 4. Modification example

[0105] 1. The first embodiment

[0106] 1-1. Configuration of recording / reproducing device and optical recording medium

[0107] figure 1 is a schematic diagram showing the internal configuration of a recording / playback device according to an embodiment of the present invention.

[0108] first, and Figure 34 Like the large-capacity recording medium shown in , the large-capacity recording medium 1 is a large-capacity optical recording medium having a recording layer as a large-capacity layer.

[0109] The large-capacity recording medium 1 is a disk-type optical recording medium, and mark recording (information recording) is performed by irradiating laser light onto the large-capacity recording medium 1 that is rotationally driven. Playback of recorded information is also performed by irradiating laser light onto the mass recor...

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Abstract

Disclosed are an encoding apparatus and method, a recording apparatus and method, and a decoding apparatus and method. An encoding apparatus that converts m-bit data words into n-bit code words, where m and n are both integers and satisfy an expression 2n>=2m*2, includes a first conversion table in which 2m m-bit data words are associated with 2m n-bit code words selected from 2n n-bit code words, a second conversion table in which the 2m m-bit data words are associated with 2m n-bit code words that have been selected from the 2n n-bit code words and that do not overlap with the 2m n-bit code words in the first conversion table, and an encoder configured to select and output an n-bit code word with which an m-bit data word that has been input is associated in the first conversion table or an n-bit code word with which the m-bit data word that has been input is associated in the second conversion table, the selected and output n-bit code word having a smaller number of symbols ''1''.

Description

technical field [0001] The present invention relates to an encoding device and method for converting m-bit data words into n-bit code words. In addition, the present invention relates to a recording apparatus and method for recording a recording code string obtained by such encoding. Furthermore, the present invention relates to a decoding device and method for decoding a recording code string. Background technique [0002] As optical recording media on which signals are recorded by radiating light and on which signals are played back (playback), such as compact disc (CD), digital versatile disc (DVD), and Blu-ray Disc (BD) (registered trademark) Classes of so-called CD-ROMs are widely used. [0003] For these currently widely used optical discs, mark edge recording is performed in which the recording code is defined by non-return-to-zero inversion (NRZI) and converted to non-return-to-zero before recording (NRZ) code. [0004] Also, in an optical disc, since a tracking ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03M5/22G11B7/0065
CPCH03M5/145G11B20/1426G11B2220/2504G11B2020/1457
Inventor 东野哲
Owner SONY GRP CORP
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