Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Memory elements with increased write margin and soft error upset immunity
Mobile phone
System and method for combining different tablets into a pouch
Stable nanoemulsions for ultrasound-mediated drug delivery and imaging
Stabilization of dicarbonate diesters with protonic acids
Lid for a container
Methods and systems for presenting an inhalation experience
  Randomly Featured Patents
Electrospray devices for mass spectrometry
Payer direct hub
Method and system for button press and hold feedback
Building security system
Recirculating target and method for producing radionuclide
Door hinge repair apparatus and method
System and method for serving web pages
Method for etching anti-reflective coating film
Lateral drain-extended MOSFET having channel along sidewall of drain extension dielectric
Solar roof collector