Abstract: An advertisement delivery system includes a billing system that provides a plurality of schedule files providing time and zone information for inserting advertisement in a first delivery format and in a second delivery format to subscribers of a cable television network, an ad inserter that inserts advertisements according to the plurality of schedule files, and a merge module that receives a first plurality of log files that provide information about advertisement playback status for the first delivery format and a second plurality of log files that provide information about advertisement playback status for the second delivery format and merges the first plurality of log files and the second plurality of log files according to a set of rules to produce a plurality of merged log files, and delivers the plurality of merged log files to the billing system.

Abstract: A prefix matching apparatus for directing information to a destination port includes a memory configured to store a piece of data including an address and a plurality of levels each including a plurality of memory locations, the levels each representing a unique address space. A controller is coupled to the memory and to the plurality of levels, and is configured to read the data address and to direct the data to the next level associated with a unique address space associated with the data address. In one embodiment, the controller is configured to match the data address prefix to a plurality of addresses associated with the unique address spaces. Advantages of the invention include fast switch decisions and low switch latency.