Patent ID: 9692491
Date: 2017-06-27
CPC Classifications: H04B,H04H,H04L

Claim:
1. A method for transmitting broadcast signals, the method comprising: encoding service data corresponding to each of a plurality of physical paths; time interleaving the encoded service data in each physical path by at least one TI (Time Interleaving) block, wherein at least one virtual FEC (Forward Error Correction) block is ahead of FEC blocks in the at least one TI block, wherein the each TI block includes a variable number of FEC blocks of the encoded service data, wherein a number of the at least one virtual FEC block is defined based on a maximum number of FEC blocks of the at least one TI block; building at least one signal frame including the time interleaved service data; modulating data in the built at least one signal frame by an OFDM (Orthogonal Frequency Division Multiplex) scheme; and transmitting the broadcast signals having the modulated data.