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Data transmitting method, data recording apparatus, record medium and data reproducing apparatus

A technology of data recording and data reproduction, which is applied in the direction of digital recording/reproduction, data recording, recording signal processing, etc., and can solve problems that cannot be solved

Inactive Publication Date: 2003-11-05
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method does not solve the above-mentioned problem of extracting data by dump copying
[0005] Specifically, all duplication or dump duplication is performed by a reproduction head such as an optical head that reads out a digital bi-level signal and then utilizes a technique of directly extracting a digital bi-level signal, thereby causing problems.

Method used

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  • Data transmitting method, data recording apparatus, record medium and data reproducing apparatus
  • Data transmitting method, data recording apparatus, record medium and data reproducing apparatus
  • Data transmitting method, data recording apparatus, record medium and data reproducing apparatus

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Embodiment Construction

[0031] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0032] Fig. 1 is a block diagram of a data recording apparatus using the present invention.

[0033] Referring to FIG. 1, digital data such as data converted from an analog audio signal or video signal by A / D conversion or computer data is supplied to an input terminal 11 . The input digital data is sent to the sector forming circuit 13 through the interface circuit 12, thereby forming sectors, and each sector is constituted by 2048 bytes as a unit. The data forming a sector is sent to a shuffling circuit 14 for shuffling. Shuffling here refers to randomizing the input data in order to prevent the same byte form from appearing consecutively, ie to remove the same form so that the signal can be read and written correctly. The scrambled or randomized data is sent to a header appending circuit 15, which appends header data at the head of each se...

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PUM

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Abstract

A data transfer method preventing direct copying of digital bi-level signals, when circuits 13 to 16 process input digital data at input terminal 11, modulation circuit 17 modulates the data and synchronization addition circuit 18 appends a synchronization signal. The synchronization signal is appended using a synchronization form different from the standard-compliant synchronization form that is not normally used, eg a synchronization form different from the canonical synchronization form can be used, and the synchronization signal can also be inserted at a position different from the canonical position. If an attempt is made to directly copy a digital bilevel signal of this synchronous format, for example, the synchronization can be de-synchronized to prevent and prohibit copying.

Description

technical field [0001] The present invention relates to a data transfer method, a data recording device, a data recording medium (recorded, recordable or recorded) and a data reproducing device, which can be used to prevent transfer or recording / reproduction of digital data copying or illegal use. Background technique [0002] Recently, with the increase in capacity and widespread use of digital recording media such as optical discs, it has become a duty to prevent their unauthorized use and duplication. That is, digital audio data or digital video data can be reproduced perfectly, but computer data can be reproduced to obtain the same data as the original data, thereby causing problems due to unauthorized reproduction. [0003] In order to prevent unauthorized copying of digital audio data or digital video data, the so-called Serial Copy Management System (SCMS) standard or Copy Generation Management System (CGMS) standard has been known so far. However, since these stand...

Claims

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Application Information

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IPC IPC(8): G11B20/10
CPCG11B19/02G11B20/00246G11B20/00318G11B20/00347G11B20/0063G11B20/00768G11B20/1251G11B20/1813G11B23/284G11B23/36G11B27/3027G11B27/329G11B2220/2562
Inventor 佐古曜一郎大泽义知栗原章川嶋功增田昌三广和英男
Owner SONY CORP
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