Interactive applications
First Claim
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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.
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Abstract
An interactive broadcast system comprising a plurality of user interfaces each comprising a local clock signal generator. Each user interface delivers interactive applications to a respective user with reference to its respective local clock signal. A central control system broadcasts data to the user interfaces. The CCS detects adjustment of the local clock signals to identify fraudulent users.
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Citations
10 Claims
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1. An interactive broadcast system comprising:
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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 Dependent Claims (2, 3, 4, 5)
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6. A method of detecting fraudulent users in an interactive broadcast system, the method comprising:
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(1) broadcasting data to a plurality of user interfaces from a central control system (CCS); (2) generating a local clock signal at each user interface; (3) delivering an interactive application to a respective user from each user interface with reference to its respective clock signal; (4) receiving data at the CCS from the local user interfaces; (5) identifying 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; (6) periodically broadcasting a central clock signal to the user interfaces; and (7) calculating at the user interface an offset signal with reference to the central clock signal and a respective local clock signal so as to enable obtaining the central clock signal from the local clock signal. - View Dependent Claims (7, 8, 9)
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10. A method of detecting fraudulent users in an interactive broadcast system, the method comprising:
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(1) broadcasting data to a plurality of user interfaces from a central control system (CCS); (2) generating a local clock signal at each user interface; (3) delivering an interactive application to a respective user from each user interface with reference to its respective local clock signal; (4) receiving data at the CCS for the local interface; (5) identifying 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; (6) periodically broadcasting a central clock signal to the user interfaces; and (7) calculating an offset signal at the user interface with reference to the central clock signal and a respective local clock signal so as to enable obtaining the central clock signal from the local clock signal.
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Specification