Record carrier with watermark,申请号EP20060116514-传众专利搜索

Record carrier with watermark

申请公布号：EP1710796(A1)

申请号：EP20060116514

申请日期：2001.11.12

申请公布日期：2006.10.11

申请人：

KONINKLIJKE PHILIPS ELECTRONICS N.V.

发明人：YNTEMA, GERTJAN;WERNER, ANTONIUS, J., J.;KRAMER, ENGELBERTUS, P., G., M.

分类号：G11B20/00;H04N5/91;G11B20/10;G11B20/12;G11B20/14;H04N5/92

主分类号：G11B20/00

摘要：The invention relates to a record carrier (1) comprising a pattern of substantially parallel tracks (2) for storing data in the form of marks, in which the data is encoded by means of a channel code. The record carrier further includes a watermark (3) which is provided by controlling the parameter of the channel code so as to introduce a predetermined run length distribution in the marks on the record carrier. Brightness differences are caused by introducing this run length distribution. The invention also relates to a device for reading a record carrier, a method of providing a watermark on the record carrier, and a device for providing a watermark on a record carrier.