Signal tracing system and method
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United States of America Patent
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Jun 19, 2007
Grant Date -
Apr 22, 2004
app pub date -
Feb 25, 2002
filing date -
Feb 26, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A system and a method are for determining the origin of a signal received by a pay television subscriber in a given region. A system includes an encryption device located at a main operator, a transmission device adapted to transmit an encrypted video signal towards at least one local operator, and a decryption device at the local operator. The decryption device includes an identification device for replacing all or part of the decrypted video signal with an identification signal characterising the decryption device.
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