Patent ID: 8565130

Claim:
A method of transmitting a broadcast signal, the method comprising: block processing mobile data using a specific code rate of 1/2, 1/3 or 1/4; forming data groups including the block processed mobile data and known data sequences; packet formatting mobile data packets including data in the data groups, wherein the mobile data packets include a specific number of mobile data packets and a scalable number of mobile data packets, wherein the scalable number is scalable up to 38, wherein each of the data groups includes a plurality of regions, the plurality of regions including data blocks, each of the data blocks including a plurality of data segments, wherein a first region and a second region of the plurality of regions include a primary ensemble of the mobile data and the known data sequences, wherein a third region, a fourth region and a fifth region of the plurality of regions include a secondary ensemble of the mobile data, and wherein the fifth region further includes the scalable number of mobile data packets; by-passing data randomizing and Reed-Solomon (RS) encoding on data in the mobile data packets when the scalable number is 38; interleaving data in the mobile data packets; and transmitting the interleaved data in a transmission frame during a slot, wherein the mobile data in the first region and the second region are block processed with a specific code rate of 1/2 or 1/4, and wherein the mobile data in the third region, the fourth region and the fifth region are block processed with a specific code rate of 1/2, 1/3 or 1/4.