Method for controlling and implementing blackout in IPTV networks
A media content broadcast blackout control method, comprising receiving a retune message requesting a blackout of a primary media content broadcast in specific regions, generating a playlist for each region comprising a content key wrapped in a region-specific media key, wherein the content key in the playlists for regions that are not subject to the blackout is configured to access the primary media content broadcast, and the content key in the playlists for regions that are subject to the blackout is configured to access an alternate media content broadcast, providing the playlists to client devices within each region, providing the primary media content broadcast to client devices whose region-specific media key unwraps the content key for the primary media content broadcast, and providing the alternate media content broadcast to client devices whose region-specific media key unwraps the content key for the alternate primary media content broadcast.
1. A media content broadcast blackout control method, comprising:
receiving a retune message from an IPTV provider at a central data center, said retune message comprising a request for a blackout of a primary media content broadcast in one or more of a plurality of regions;
generating a playlist with a blackout manager for each of said plurality of regions, each said playlist comprising a content key wrapped in a region-specific media key that is specific to the region associated with said playlist, wherein said content key in the playlists for regions that are not subject to said blackout is configured to access said primary media content broadcast, and wherein said content key in the playlists for regions that are subject to said blackout is configured to access an alternate media content broadcast;
providing said playlist associated with each of said plurality of regions to one or more client devices within each of said plurality of regions;
providing said primary media content broadcast to one or more client devices whose region-specific media key unwraps said content key for said primary media content broadcast;
providing said alternate media content broadcast to one or more client devices whose region-specific media key unwraps said content key for said alternate media content broadcast;
encrypting chunks of said primary media content broadcast using said content key for said primary media content broadcast;
storing said chunks on an origin server;
wherein each said playlist for regions that are not subject to said blackout further comprises location identifiers for chunks of said primary media content broadcast that were encrypted using said content key for said primary media content broadcast,
wherein each said playlist for regions that are subject to said blackout further comprises location identifiers for chunks of said alternate media content broadcast that were encrypted using said content key for said alternate media content broadcast; and
wherein said location identifiers are uniform resource locators (URLs) pointing to locations on an origin server.
2. The media content broadcast blackout control method of claim 1 , further comprising replacing said content key for said primary media content broadcast with a new content key when said retune message is received.
3. The media content broadcast blackout control method of claim 1 , further comprising providing said one or more client devices with the region-specific media key corresponding to the region in which each said client device is physically located.
4. The media content broadcast blackout control method of claim 1 , wherein said primary media content broadcast and said alternate media content broadcast originate from the same content provider.
5. The media content broadcast blackout control method of claim 1 , wherein said primary media content broadcast and said alternate media content broadcast originate from different content providers.
6. A media content broadcast blackout control method, comprising:
receiving a retune message from an IPTV provider, said retune message comprising a request for a blackout of a media content broadcast in at least one of a plurality of regions;
rotating to a new content key for said media content broadcast in response to said retune message, and encrypting said media content broadcast with said new content key;
encrypting an alternate media content broadcast with an alternate content key;
generating a region-specific playlist for each of said plurality of regions in response to said retune message, wherein the region-specific playlist for a particular region that is subject to said blackout comprises said alternate content key wrapped in a media key that is specific to said particular region, and the region-specific playlist for a particular region that is not subject to said blackout comprises said new content key wrapped in a media key that is specific to said particular region;
providing client devices in each of said plurality of regions with the region-specific playlist associated with the region in which the client device is located;
de-encrypting and providing said media content broadcast to client devices that received a region-specific playlist comprising a media key that unwraps said new content key;
de-encrypting and providing said alternate media content broadcast to client devices that received a region-specific playlist comprising a media key that unwraps said alternate content key;
wherein each said playlist for regions that are not subject to said blackout further comprises location identifiers of said primary media content broadcast that was encrypted using said content key for said primary media content broadcast,
wherein each said playlist for regions that are subject to said blackout further comprises location identifiers for said alternate media content broadcast that was encrypted using said content key for said alternate media content broadcast; and
wherein said location identifiers are uniform resource locators (URLs) pointing to locations on an origin server.
7. A central data center for an Internet Protocol Television system, comprising:
one or more integrated receiver-decoders configured to receive media content broadcasts from one or more IPTV providers;
a packager configured to encrypt chunks of said media content broadcasts with a content key;
an origin server configured to store said chunks after encryption;
a playlist builder configured to generate an initial playlist comprising the locations of said chunks on said origin server;
a playlist rebuilder configured to generate region-specific playlists for each of a plurality of regions, each said region-specific playlist having a protected control word comprising said content key wrapped in a region-specific media key, wherein said playlist rebuilder is:
configured to generate a blackout region-specific playlist for each of said plurality of regions that is subject to a blackout of a primary media content broadcast, each said blackout region-specific playlist comprising the content key used to encrypt chunks of an alternate media content broadcast wrapped in the region-specific media key for the region subject to said blackout;
configured to generate a non-blackout region-specific playlist for each of said plurality of regions that is not subject to said blackout of a primary media content broadcast, each said non-blackout region-specific playlist comprising the content key used to encrypt chunks of said primary media content broadcast wrapped in the region-specific media key for the region that is not subject to said blackout;
wherein each said playlist for regions that are not subject to said blackout further comprises location identifiers for chunks of said primary media content broadcast that were encrypted using said content key for said primary media content broadcast,
wherein each said playlist for regions that are subject to said blackout further comprises location identifiers for chunks of said alternate media content broadcast that were encrypted using said content key for said alternate media content broadcast; and
wherein said location identifiers are uniform resource locators (URLs) pointing to locations on an origin server.
8. The central data center for an Internet Protocol Television system of claim 7 , further comprising a transcoder configured to multibitrate transcode the received media content broadcasts and forward the transcoded media content broadcasts to said packager.