Visual watermark in both data area and inner-ring area of record carrier

Visual watermark in both data area and inner-ring area of record carrier

  • CN 1,910,687 A
  • Filed: 01/21/2005
  • Published: 02/07/2007
  • Est. Priority Date: 01/23/2004
  • Status: Active Application
First Claim
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1. a record carrier comprisesData field (22) with mark pattern storage data, data are encoded in the mode of channel code in described data field, wherein channel code parameter is controlled to introduce a predetermined run length distribution in the mark on described record carrier, introduce the first information relevant thus with watermark, andA non-data field (21,23), described non-data field comprises second information relevant with watermark,Described first and second information form described watermark.

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