Patent ID: 10193725

Abstract:
A broadcast signal transmitter includes a Forward Error Correction (FEC) encoder configured to perform error correction processing on PLP data; a time interleaver configured to perform time-interleaving on the PLP data; a framer configured to generate a signal frame comprising the PLP data; a frequency interleaver configured to perform frequency-interleaving on the signal frame; and a waveform generator configured to generate a transmission signal comprising the signal frame, wherein the signal frame comprises a preamble, and at least one subframe, wherein the preamble comprises at least one preamble symbol, the at least preamble symbol carries Layer 1 (L1) signaling data for the signal frame, and wherein the first preamble symbol comprises preamble_symbol_number information, and the preamble_symbol_number information indicates a number of preamble symbols other than the first preamble symbol.