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Data recording apparatus and method

A technology for data recording and equipment, applied in data recording, digital recording/reproduction, recording signal processing, etc., and can solve problems such as data corruption

Inactive Publication Date: 2004-05-19
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Visually or audibly perceivable data corruption occurs due to repetition of the compression process

Method used

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  • Data recording apparatus and method
  • Data recording apparatus and method

Examples

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Embodiment Construction

[0018] Referring to the drawings, a data recording device and a data recording method using the same according to the present invention will be described in detail.

[0019] see first figure 1 , content data read from a removable recording medium such as an optical disc or an IC card, or a closed recording medium enclosed in a main body portion of a hard disk, or content received through a network is provided at the input terminal 11 of the data recording device 10 data. The content data supplied to the input terminal 11 is exemplified by data of music air data, animation data, or game software, and is compressed and encrypted. In content data, copyright management data is embedded by means of a watermark signal. These copyright management data are data such as the number of possible playbacks of content data, the number of possible copies of content data, verification data, or copyright owner data for preventing illegal copying or distribution of content data. To prevent c...

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Abstract

A data recording / reproducing apparatus includes a decoding unit (12), a detection unit (26), data processing units (14, 15, 17, 18, 19), a recording unit, and a control unit (23). The decoding unit decrypts and / or decompress the input data which has been encrypted and / or compressed. The detection unit detects whether the output data of the decoding unit contains a watermark signal.

Description

technical field [0001] The present invention relates to a data recording device and a data recording method by which data whose copyright etc. are managed by using a watermark signal can be efficiently recorded on a recording medium. [0002] This application claims priority from Japanese Patent Application No. 2002-028648 (filing date February 5, 2002), which is hereby incorporated by reference in its entirety. Background technique [0003] There are cases where copyright management data is embedded in content data such as music, animation or game software in order to restrict illegal copying of the content data. For example, the SDMI (Secure Digital Music Initiative) (SecureDigital Music Initiative), which is set up to develop a unified system for copyright protection technology available globally, is now investigating and researching the use of watermark signals to embed copyright management data into music air data, so that development can be protected with The current ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/10G06F21/16G11B20/00G11B20/10
CPCG11B20/00086G11B20/10527G11B20/0021G11B20/00181G11B20/00246G11B20/00115G11B20/00478G11B20/00224G11B20/00884G11B20/10
Inventor 佐古曜一郎
Owner SONY CORP
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