×

Interactive applications

  • US 7,073,190 B1
  • Filed: 05/01/2000
  • Issued: 07/04/2006
  • Est. Priority Date: 05/04/1999
  • Status: Expired
First Claim
Patent Images

1. An interactive broadcast system comprising:

  • a plurality of user interfaces each having a local clock signal generator, wherein each user interface delivers interactive applications to a respective user with reference to its respective local clock signal;

    a central control system (CCS) for broadcasting data to the user interfaces and for receiving data from the user interfaces, the CCS being adapted to identify fraudulent adjustment of one of the local clock signals by comparing the time of receipt by the CCS of certain data sent by one of the user interfaces with the time of receipt of data from another different one of the user interfaces;

    means for periodically broadcasting a central clock signal to the user interfaces; and

    each user interface having means for calculating an offset signal with reference to the central clock signal and its respective local clock signal so as to enable obtaining the central clock signal from the local clock signal.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×