System and method for protecting digital media

System and method for protecting digital media

  • CN 1,398,400 A
  • Filed: 11/23/2001
  • Published: 02/19/2003
  • Est. Priority Date: 12/05/2000
  • Status: Active Application
First Claim
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1. be used for a kind of system (10) of reference numerals record (12), wherein this digital recording (12) has a plurality of magnetic tracks, and this system comprises:

  • Be used for that this digital recording (12) is divided into a plurality of sectors (44) and with a device (16) that random number is relevant with each sector;

    Be used for identifier is calculated as the device (20) of the function of these correlation random numbers;

    WithWatermark device (23) is used for the sector in one group of sector of watermark (46), and the watermark that wherein is used for each sector comprises the sector is relevant therewith the random number and the part of this identifier.

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