Patent ID: 8078945

Claim:
A method of transmitting a broadcast signal in a transmitter, the method comprising: encoding mobile data to build a Reed-Solomon (RS) frame according to an RS code mode; dividing the built RS frame into a plurality of portions; convolutional encoding the mobile data in the plurality of divided portions; forming data groups including the convolutional encoded mobile data, wherein each of the data groups include a plurality of regions in which data blocks including contiguous data segments of the convolutional encoded mobile data are categorized, wherein transmission parameters of the mobile data are inserted into the corresponding data group, and wherein the transmission parameters include information for the RS code mode and information about the plurality of regions in the corresponding data group; forming mobile data packets including data in the data groups; multiplexing the mobile data packets and main data packets including main data; and transmitting a broadcast signal including the multiplexed mobile data packets and main data packets, wherein a collection of the data groups are carried in specific time slots.