Patent ID: 9680601
Date: 2017-06-13
CPC Classifications: H04B,H04H,H04L

Claim:
1. A method of processing broadcast data in a transmitter, the method comprising: Forward Error Correction (FEC) encoding Physical Layer Pipe (PLP) data of at least one PLP for a service; time interleaving the FEC-encoded PLP data; FEC encoding signaling data for signaling the PLP data; building a signal frame including the FEC-encoded signaling data and the time-interleaved PLP data; modulating data in the signal frame by an Orthogonal Frequency Division Multiplexing (OFDM) method; inserting preamble symbols after modulating the data in the signal frame by the OFDM method; and transmitting a broadcast signal including the preamble symbols and the modulated signal frame, wherein the preamble symbols include two OFDM symbols for synchronizing and signaling the broadcast signal in front of the modulated signal frame, wherein the preamble symbols include a prefix of a first symbol, the first symbol, a postfix of the first symbol, a prefix of a second symbol, and the second symbol in a time domain structure, wherein the postfix of the first symbol and the prefix of the second symbol are consecutively positioned in the time domain structure, and wherein a duration of the prefix of the first symbol, a duration of the postfix of the first symbol, and a duration of the prefix of the second symbol are different from each other.