Patent ID: 8099654

Claim:
A method of transmitting broadcast data in a digital broadcast transmitting system, the method comprising: Reed-Solomon (RS) encoding and Cyclic Redundancy Check (CRC) encoding, by an RS frame encoder, mobile service data, thereby outputting an RS frame, wherein the RS frame comprises an RS frame payload including the mobile service data, RS parity data added to bottom ends of columns of the RS frame payload, and CRC data added to right ends of rows of the RS frame payload including the RS parity data; mapping, by a group formatting unit, data in the RS frame into data groups, adding known data sequences, transmission parameters and MPEG header data place holders to each of the data groups and deinterleaving the data groups; replacing, by a packet formatter, the MPEG header data place holders with MPEG header data in the deinterleaved data groups and outputting mobile service data packets; multiplexing, by a multiplexer, mobile service data packets and main service data packets including main service data; and transmitting a transmission frame including the multiplexed data packets, wherein the transmission frame comprises M consecutive sub frames, wherein each sub frame comprises N consecutive slots, wherein one of the slots transmits one of the data groups, and wherein M and N are integers greater than 1.