Patent ID: 8774219

Claim:
A method for transmitting a main packet stream generated by multiplexing a plurality of substreams, using a single transmission channel, comprising: packeting each of the plurality of substreams and generating substream packets; allocating substream sequence information to the substream packets according to a sequence in which the substream packets are generated; allocating main packet stream sequence information to the substream packets according to a sequence in which the substream packets are inputted; multiplexing inputted substream packets and generating the main packet stream, and allocating main packet stream sequence information, substream sequence information, and a substream identifier for each header of each packet included in the main packet stream, wherein the main packet stream sequence information includes information indicating an order of a corresponding packet in an entire packet stream, wherein the substream sequence information includes information indicating an order of a corresponding packet in each substream, and wherein the substream identifier includes information indicating that a corresponding packet is a packet of which substream among a plurality of substreams.