Patent ID: 9634691
Date: 2017-04-25
CPC Classifications: H03M,H04H,H04N

Claim:
1. A method for transmitting broadcast signals, the method comprising: encoding first service data and second service data, wherein the first service data includes data of a core mode, and the second service data includes data of the core mode and data of an extended mode, and wherein the data of the core and extended modes of the second service data are encoded by different code rates; interleaving the first service data and the second service data, wherein the interleaved first service data and the interleaved second service data include groups, respectively, and a number of the groups is variable based on an amount of the interleaved first service data or the interleaved second service data; building at least one signal frame including the interleaved first service data and the interleaved second service data; and transmitting broadcast signals including the built at least one signal frame.