Multi-point service injection in a broadcast system

摘要

A broadcast system for broadcasting data streams includes a hierarchical network of data distributors starting from one central distributor ( 110 ) through at least one layer of intermediate distributors ( 120, 130, 140 ) to a plurality of broadcast receivers ( 150 ). Data streams are broadcast through downstream channels ( 160 ) of the network to the plurality of broadcast receivers. At least one distributor hierarchically below the central distributor is operative to insert broadcast data in at least one up-stream channel ( 170 ) of the network towards the central distributor. The central distributor is arranged to re-distribute broadcast data received via at least one up-stream channel through at least one downstream channel of the network.