Resources Contact Us Home
System and method for optical medium region protection

Image Number 3 for United States Patent #7805753.

Restrictions on optical drive code changes, such as a predetermined number of region code changes for playing optical media with varying region codes, are enforced with an application solution. Each request to perform a region code change is authorized by retrieving a certificate to verify that a code change is permitted, decrementing the number of remaining authorized code changes reflected by the certificate, and storing the updated certificate for use at a subsequent code change request. The certificate is generated by application of one or more unique identifiers and encrypted during storage for security.

  Recently Added Patents
Traveling vehicle system and self-diagnosis method for the traveling vehicle system
Ion beam system and method of operating ion beam system
Inhibitors of bacterial tyrosine kinase and uses thereof
Frame timing synchronization in a geostationary satellite system
Composite high reflectivity layer
Fast base station switching method and system, and hierarchical zone-based fast handoff approach
Bi-directional switch using series connected N-type MOS devices in parallel with series connected P-type MOS devices
  Randomly Featured Patents
Record player program selector
Piezoelectric generator
Space conditioning system with outdoor air and refrigerant heat control of dehumidification of an enclosed space
Apparatus and method for processing data having a mixed vector/scalar register file
Data sharing method, request processing method, program, and apparatus
Method for producing propellant charges and charges produced according to this method
Method and vessel for storing a substrate cleaning brush
Picture signal encoding method and apparatus
Method for treating cement slurries