Title:
記録担体のデータ領域及び内側リング領域の両方における視覚的ウォーターマーク
Document Type and Number:
Japanese Patent JP4825136
Kind Code:
B2
Abstract:
A record carrier including a data area for storing data in the form of marks, in which the data is encoded by means of a channel code, wherein a parameter of the channel code is controlled so as to introduce a predetermined run length distribution in the marks on the record carrier, thereby introducing first information relating to a watermark, and a non-data area comprising second information relating to a watermark, the first and the second information forming the watermark. This watermark, extending over the data-area and the inner-ring area and/or the outer-ring area, can be used for checking the authenticity of the record carrier and/or the recordings made on this record carrier.
Inventors:
Aintema Hertyan
Application Number:
JP2006550428A
Publication Date:
November 30, 2011
Filing Date:
January 21, 2005
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
G11B20/10; G11B20/00; G11B20/12; G11B20/14
Domestic Patent References:
| JP2000163883A | 2000-06-16 | |||
| JP2002123983A | 2002-04-26 | |||
| JPH11162031A | 1999-06-18 |
Attorney, Agent or Firm:
Susumu Tsugaru
Akihiko Miyazaki
Fueda Shusen
Akihiko Miyazaki
Fueda Shusen