Patent ID: 9674019
Date: 2017-06-06
CPC Classifications: H04L,H04W

Claim:
1. A method of transmitting a broadcast signal, the method comprising: formatting an input stream into at least one physical layer pipe (PLP); encoding data of the at least one PLP; framing at least one signal frame comprising the encoded data; selectively performing frequency interleaving for a specific transport block; modulating the at least one signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) scheme; and transmitting the broadcast signal comprising the at least one modulated signal frame, wherein the frequency interleaving is performed by using a different interleaving sequence for each symbol pair, wherein the symbol pair comprises two sequential symbols, and wherein the at least one signal frame comprises control information indicating whether the frequency interleaving is performed for the specific transport block, when the value of the control information is set to a first value, the first value of the control information indicates that the frequency interleaving is performed, and when the value of the control information is set to a second value, the second value of the control information indicates that the frequency interleaving is not performed.