Patent ID: 8670437

Claim:
A method for service acquisition, the method comprising: generating one or more channel switch video (CSV) signals associated with one or more multimedia signals, wherein a CSV signal comprises an independently decodable, low-resolution channel switch version of a video signal from an associated multimedia signal, the channel switch version being transmitted periodically to provide random access into a coded video bitstream; encoding the CSV and multimedia signals to produce error coded blocks at an encoder, wherein the error coded blocks comprise error coded blocks associated with overhead information and error coded blocks comprising data associated with the one or more multimedia signals; pre-interleaving the error coded blocks at a pre-interleaver so the error coded blocks comprising data associated with the one or more multimedia signals are placed contiguously between the error coded blocks associated with overhead information, and further pre-interleaving the error coded blocks at the pre-interleaver so that an error coded block comprising keys needed to decode the error coded blocks comprising data associated with the one or more multimedia signals is placed after the error coded blocks comprising data associated with the one or more multimedia signals are placed; and encapsulating the pre-interleaved error coded blocks into a packet of a multiplex signal, wherein said generating comprises generating the one or more CSV signals by sub-sampling in at least one of a spatial or temporal domain.