Patent ID: 8370707

Claim:
A method of processing broadcast data in a digital broadcast transmitting system, the method comprising: randomizing, by a randomizer, mobile service data; Reed-Solomon (RS) encoding and Cyclic Redundancy Check (CRC) encoding the randomized mobile service data in order to build an RS frame; dividing the built RS frame into L portions, wherein L is greater than 1; adding K bytes of dummy data to one of the L portions, wherein K is greater than or equal to 0; encoding data in the L portions at a code rate of 1/H, wherein H is greater than 1; interleaving the encoded data in order to output first interleaved data; mapping the first interleaved data into data groups; adding known data sequences and transmission parameters to each of the data groups; deinterleaving data of the data groups; interleaving, by an interleaver, the deinterleaved data in order to output second interleaved data; and transmitting a transmission frame including the second interleaved data, wherein the transmission frame comprises M consecutive sub frames, wherein each of the M consecutive sub frames comprises N consecutive slots, wherein one of the data groups is transmitted through one of the N consecutive slots, wherein the transmission parameters include information for indicating a current sub frame number within the transmission frame and information for indicating a current slot number within a sub frame of the transmission frame, and wherein M and N are integers greater than 1.