Interactive video distribution systems – Access control or blocking – With encryption or scrambling of video signal
Reexamination Certificate
2003-02-10
2009-08-04
Lonsberry, Hunter B. (Department: 2421)
Interactive video distribution systems
Access control or blocking
With encryption or scrambling of video signal
C725S025000, C725S086000, C725S087000
Reexamination Certificate
active
07571451
ABSTRACT:
A video-on-demand conditional access information distribution system includes establishing a session with a set top terminal by defining an in-band communications channel for transporting content to the set top terminal, and communicating to the set top terminal via the defined in-band communications channel, an authorization message and descrambling message suitable for determining a descrambling key for descrambling a program stream. The set top terminal sends a request for content via an out of band communications channel and a scrambled program stream is provided to the set top terminal via the defined in-band communications channel. The authorization message is sent prior to the set top terminal receiving the descrambling message and the scrambled program stream, which includes video-on-demand content requested by the set top terminal.
REFERENCES:
patent: 4225884 (1980-09-01), Block et al.
patent: 4771458 (1988-09-01), Citta et al.
patent: 4989245 (1991-01-01), Bennett
patent: 5138649 (1992-08-01), Krisbergh et al.
patent: 5479508 (1995-12-01), Bestler et al.
patent: 5485221 (1996-01-01), Banker et al.
patent: 5592551 (1997-01-01), Lett et al.
patent: 5600364 (1997-02-01), Hendricks et al.
patent: 5600573 (1997-02-01), Hendricks et al.
patent: 5631693 (1997-05-01), Wunderlich et al.
patent: 5826166 (1998-10-01), Brooks et al.
patent: 5894320 (1999-04-01), Vancelette
patent: 5930361 (1999-07-01), Hayashi et al.
patent: 6005631 (1999-12-01), Anderson et al.
patent: 6055315 (2000-04-01), Doyle et al.
patent: 6070001 (2000-05-01), Meissner et al.
patent: 6118976 (2000-09-01), Arias et al.
patent: 6157719 (2000-12-01), Wasilewski et al.
patent: 6184878 (2001-02-01), Alonso et al.
patent: 6211901 (2001-04-01), Imajima et al.
patent: 6240553 (2001-05-01), Son et al.
patent: 6378130 (2002-04-01), Adams
Cox Communications, Inc.
Lonsberry Hunter B.
Merchant & Gould
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