DATA RECORDING MEDIUM, DATA RECORDING METHOD AND DEVICE

Title:

DATA RECORDING MEDIUM, DATA RECORDING METHOD AND DEVICE

Document Type and Number:

Japanese Patent JP2003346431

Kind Code:

A

Abstract:

To provide a data recording medium capable of discriminating an original or a copy without intentionally inserting a defect and contributing to copy prevention.

Special data is inputted from a terminal 6B so as to unilaterally increase a DSV (digital sum variation) cumulative value when it is encoded together with a standard subcode byte. When this special data is recorded, a special subcode is inputted from aa terminal 7C so as to set the DSV cumulative value in a fixed range when it is encoded as the subcode data of an EFM frame together with the special data. A disk on which a recording signal formed in such a manner is recorded is copied by a CD-R or the like. Since the subcode data is replaced by the standard data during encoding, when the created disk is played by a normal CD player, the DSV cumulative value is increased to possibly impede normal data reproduction, and thus, the copy protection of the disk is realized.

Inventors:

SAKO YOICHIRO
INOGUCHI TATSUYA
FURUKAWA SHUNSUKE
KIHARA TAKASHI
AIDA KIRI
SAITO AKINARI
KANEDA YORIAKI
SANO TATSUFUMI
MIYOSHI YOSHIRO
SAKINO TOSHIHIKO
USUI YOSHINOBU

Application Number:

JP2002156045A

Publication Date:

December 05, 2003

Filing Date:

May 29, 2002

Export Citation:

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Assignee:

SONY CORP
SONY DISC TECHNOLOGY INC

International Classes:

G11B7/0037; G11B20/00; G11B20/10; G11B20/12; G11B20/14; G11B7/26; (IPC1-7): G11B20/14; G11B20/10; G11B20/12

Attorney, Agent or Firm:

Masatomo Sugiura (1 person outside)

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