Resources Contact Us Home
Information carrier containing auxiliary information, reading device and method of manufacturing such an information carrier

Image Number 4 for United States Patent #6031815.

A system for controlled reproduction of information according to the invention comprises an information carrier and a reading device. The information carrier contains information in blocks written in a track. The information carrier has reference patterns which divide the track into sectors for writing the information blocks, and auxiliary information written in the reference patterns. The auxiliary information is related to the information, for example, a decoding key, access code or digital signature. The reading device comprises a demodulation means for recovering both the information and the auxiliary information. The device may include means for processing the information and/or auxiliary information in dependence on the auxiliary information. Since the auxiliary information cannot be transferred to an illegal copy, this copy is unusable.

  Recently Added Patents
Method, device, and system for configuring component carrier in carrier aggregation scenario
Substituted bicyclic HCV inhibitors
Semiconductor device and manufacturing method thereof
Air scent dispenser
Image processing system and method
Signal processing device and method for providing oscillating signal in the signal processing device
Creating and manufacturing documents that initially exceed equipment finishing capacity
  Randomly Featured Patents
Display panel with graphical user interface for analyzing and presenting supply, fabrication, and logistics data
Methods and apparatus for blood typing with optical bio-discs
Outdoor light
Use of ester-modified organopolysiloxanes for producing cosmetic or pharmaceutical compositions
Folding arm for boat cover
One piece spinner
Drill apparatus having a primary drill and a pilot drill
Storage bag
Fungi for pitch reduction and their preparation
Setting quantization level to match DCT coefficients