Patent ID: 9705639
Date: 2017-07-11
CPC Classifications: H04B,H04H,H04L

Claim:
1. A method of transmitting broadcast signals, the method including: encoding, by a first encoder, first layer data in at least one first Physical Layer Pipe (PLP); encoding, by a second encoder, second layer data in at least one second PLP; combining, by an injection block, the encoded first layer data and the encoded second layer data with controlling an injection level of the encoded second layer data; time interleaving, by a time interleaver, the combined data; frame mapping, by a mapper, the time interleaved data onto at least one signal frame; frequency interleaving, by a frequency interleaver, data in the at least one signal frame; waveform modulating, by a waveform generation block, the frequency interleaved data in the at least one signal frame; and transmitting, by the waveform generation block, the broadcast signals having the waveform modulated data.