Patent ID: 9226000
Filing Date: 2015-12-29
Classification: H04N

Abstract:
1. A content distribution system for ensuring that total distribution content stored on a remote source matches content stored at a head end and a plurality of target units, the content distribution system comprising: a non-transitory memory at the head end; and a content distribution server configured to determine first content being part of the total distribution content stored in the remote source and is not stored in the non-transitory memory of the head end using set logic and configured to copy the first content to the head end and to the target units in a multicast operation, wherein second content stored in the non-transitory memory of the head end and being part of the total distribution content stored in the remote source before the multicast operation is not provided to the target units during multicast operation, wherein third content stored in the non-transitory memory of the head end and not part of the total distribution content stored in the remote source before the multicast operation is determined and deleted from the non-transitory memory, wherein fourth content stored in one of the target units and not part of the total distribution content stored in the remote source before the multicast operation is determined and deleted from one of the targets, wherein fifth content stored in the non-transitory memory of the head end and being part of the universal distribution content stored the remote source before the multicast operation and not being stored on another of the target units is determined and provided to the another of the target units.