| 主权项 |
1. A method of restricting access to content delivered via a video distribution network, the method comprising:
receiving, at a service delivery platform from a first video head-end office, a control stream associated with a video distribution network, wherein the control stream is associated with media content delivered via the video distribution network, and wherein the control stream includes conditional access information associated with multiple second video head-end offices, wherein particular conditional access information of the control stream indicates restriction of the media content based on a geographic area, wherein the geographic area is associated with a particular second video head-end office of the multiple second video head-end offices; parsing the control stream to create a substitution table, at the service delivery platform, based on the particular conditional access information for the geographic area, wherein the substitution table maps primary media content to substitute media content for the particular second video head-end office, indicates an acquisition server of the substitute media content, and associates a start time, an end time, and a channel with the substitute media content; and sending the substitution table to the particular second video head-end office to automatically schedule, based on the substitution table, a conditional access event at the particular second video head-end office of the video distribution network, wherein the particular second video head-end office restricts access to the media content to subscribers in the geographic area based on the conditional access event. |
