Patent ID: 7260764

Claim:
An apparatus comprising: one or more block coders for receiving blocks from a plurality of first data streams and encoding the blocks to produce a plurality of first and second portions of block coded data corresponding to the plurality of first data streams, the second portions of block coded data being unnecessary to reconstruct the first data streams when the first portions of block coded data are correctly received; and a transmitter for: transmitting a plurality of channels comprising the plurality of first and second portions of block coded data, the transmission of the plurality of second portions of block coded data offset from one another; and transmitting a multiplexed channel comprising a sequence of portions of a plurality of second data streams associated with the plurality of first data streams wherein each of the plurality of second data streams comprises supplemental data to enhance the associated one of the plurality of first data streams, the timing of transmission of each second data stream aligned with the second portion of block coded data of the corresponding first data stream.