Interactive video distribution systems – Access control or blocking – With encryption or scrambling of video signal
Reexamination Certificate
2006-09-26
2006-09-26
Miller, John (Department: 2611)
Interactive video distribution systems
Access control or blocking
With encryption or scrambling of video signal
C726S002000, C726S026000
Reexamination Certificate
active
07114168
ABSTRACT:
A method and apparatus for determining the scope of a content domain for ensuring that a content stream is not re-routed to an unauthorized display device. The apparatus includes a content source device, which supports multiple display outputs coupled to one or more content sink devices. A content source application generates and provides a content stream to a hardware interface which securely transmits the content stream to a protected content sink device using a content protection protocol. The content source application utilizes certain status information to ensure that the content stream is not re-routed to an unprotected or unapproved content sink device. The source application requests the updated session identification code from the transmitter/codec unit using the content protection protocol which is compared against the expected session identification code to ensure that the content display stream has not been re-routed to an unprotected content sink device.
REFERENCES:
patent: 5710815 (1998-01-01), Ming et al.
patent: 6069647 (2000-05-01), Sullivan et al.
patent: RE38055 (2003-04-01), Tsukamoto et al.
patent: 2003/0115324 (2003-06-01), Blumenau et al.
Faber Robert W.
Lee David A.
Traw Brendan
Wyatt David A.
Intel Corporation
Miller John
Saltarelli Dominic
Stutman-Horn Joni D.
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