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Digital data recording medium, recording method, recording device, reproduction method, and reproduction device

A technology for recording data and recording media, which is applied in data recording, recording signal processing, recording information storage, etc., and can solve problems such as difficult access to data

Inactive Publication Date: 2004-08-18
SONY CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Even if such duplication does not occur, very confidential data stored on a CD must be protected so that it cannot be easily obtained

Method used

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  • Digital data recording medium, recording method, recording device, reproduction method, and reproduction device
  • Digital data recording medium, recording method, recording device, reproduction method, and reproduction device
  • Digital data recording medium, recording method, recording device, reproduction method, and reproduction device

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Experimental program
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Embodiment Construction

[0019] A recording medium, a recorder, and a player according to the present invention will be described below with reference to the accompanying drawings.

[0020] (1) CD DSV

[0021] In a CD, one sample of digital audio data consists of 16 bits. When the 16-bit digital audio data is divided into 8 high-order bits and 8 low-order bits, the divided data is encoded using a cross-interleaved RS (Reed Solomon, Reed Solomon) code (CIRC) scheme, and Each 8-bit data is modulated using an 8-14 modulation (EFM) scheme. The modulated output data is recorded onto a CD in a spiral recording track. Each 8-bit unit is called a symbol.

[0022] Referring to FIG. 1A, the value of a symbol (raw data) is, for example, 92h (h represents a hexadecimal value). When the symbol is CIRC coded and modulated into an EFM modulated signal, the channel bits (in the EFM modulated signal) are represented as the bit sequence shown in FIG. 1B according to the standard adopted by CD. In this process, 3 b...

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Abstract

A recording method includes a step of converting m-bit data into a n-bit (m < n) data symbol and a step of adding a connection bit reducing the accumulation value of the DC component per unit time selected from a plurality of connection bits after the m-bit data symbol. If the n-bit data symbol is a special data symbol, a connection bit increasing the accumulation value of the DC component when the n-bit data symbol is added to a data symbol other than the special data symbol is selected from a plurality of connection bits and added to generate recording data. The recording data generated and data indicating a position containing the data including the special data symbol are recorded on a recording medium.

Description

technical field [0001] The present invention relates to a recording medium, recording method, recorder, playback method and digital data player. Background technique [0002] Compact discs (CDs) are widely used as media for storing various data such as digital audio data and image data or computer programs because they are easy to produce, inexpensive, and easy to manage. [0003] Today, however, improvements in the performance of personal computers and the advent of compact discs recordable (CD-R) and compact discs rewritable (CD-RW) allow digital data stored on CDs to be easily copied. In general, copying data from a CD to a CD-R or CD-RW violates copyright. Therefore, some measures are required to protect the copyright of digital data stored on CDs. [0004] Even if such duplication does not occur, the very confidential data stored on the CD must be protected so that it cannot be easily obtained. [0005] In view of these circumstances, the present invention relates to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G11B20/10G11B20/00G11B20/14H03M5/14H03M7/46H04L9/08
CPCG11B20/00086H03M7/46G11B20/00579G11B20/0021G11B2020/1457H03M5/145G11B2020/184G11B20/00927G11B20/1426G11B20/00253G11B20/10G11B20/14
Inventor 佐古曜一郎猪口达也木原隆会田桐斋藤昭也金田赖明佐野达史古川俊介碓水吉伸先纳敏彦
Owner SONY CORP