Apparatus and method for sending and receiving broadcast signals
A device for processing a broadcast signal, includes a tuner configured to receive the broadcast signal carrying a bootstrap prefixed to the beginning of a signal frame, the bootstrap including one or more bootstrap symbols, a last bootstrap symbol immediately followed by a preamble of the signal frame including bootstrap termination information, the bootstrap including first information for representing a structure of the preamble; a demodulator configured to demodulate the broadcast signal; a de-framer configured to de-frame the signal frame in the broadcast signal to output the preamble and PLP data, the preamble carrying Layer 1 (L1) signaling data for the signal frame; a signaling decoder configured to decode the L1 signaling data; and a decoder to decode the PLP data based on the L1 signaling data.
1. A device for processing a broadcast signal, comprising:
a tuner to receive the broadcast signal carrying a bootstrap prefixed to the beginning of a signal frame,
the bootstrap including one or more bootstrap symbols, a last bootstrap symbol immediately that is followed by a preamble of the signal frame signaling bootstrap termination,
the bootstrap including first information for representing a structure of the preamble;
a demodulator configured to demodulate the broadcast signal, wherein:
the preamble carries Layer 1 (L1) signaling data for the signal frame,
the preamble includes a plurality of preamble symbols,
a foremost preamble symbol of the preamble symbols has a minimum number of carriers (NoC),
the foremost preamble symbol carries second information for indicating a number of remaining preamble symbols and third information related to NoC for the remaining preamble symbols;
a frequency deinterleaver configured to deinterleave the demodulated broadcast signal based on frequency deinterleaving operation;
a de-framer configured to de-frame the signal frame in the deinterleaved broadcast signal to output Data Pipe (DP) data, the signal frame including one or more subframes carrying the DP data,
a signaling decoder configured to decode the L1 signaling data; and
a decoder to decode the DP data based on the L1 signaling data.
2. The device of claim 1 , wherein the L1 signaling data further includes FFT size information for each subframe.
3. The device of claim 2 , wherein a first subframe in the one or more subframes having a different FFT size from a second subframe includes an edge symbol, wherein the first subframe is followed by the second subframe.
4. The device of claim 3 , wherein a multiplexing method for multiplexing multiple DPs in each subframe is applied to each subframe, respectively.
5. A method for processing a broadcast signal, comprising:
receiving the broadcast signal carrying a bootstrap prefixed to the beginning of a signal frame,
the bootstrap including one or more bootstrap symbols, a last bootstrap symbol immediately that is followed by a preamble of the signal frame signaling bootstrap termination,
the bootstrap including first information for representing a structure of the preamble;
demodulating the broadcast signal, wherein:
the preamble carries Layer 1 (L1) signaling data for the signal frame,
the preamble includes a plurality of preamble symbols,
a foremost preamble symbol of the preamble symbols has a minimum number of carriers (NoC),
the foremost preamble symbol carries second information for indicating a number of remaining preamble symbols and third information related to NoC for the remaining preamble symbols;
deinterleaving the demodulated broadcast signal based on frequency deinterleaving operation;
de-framing the signal frame in the deinterleaved broadcast signal to output Data Pipe (DP) data, the signal frame including one or more subframes carrying the DP data,
a signaling decoder configured to decode the L1 signaling data; and
a decoder to decode the DP data based on the L1 signaling data.
6. The method of claim 5 , wherein the L1 signaling data further includes FFT size information for each subframe.
7. The method of claim 6 , wherein a first subframe in the one or more subframes having a different FFT size from a second subframe includes an edge symbol, wherein the first subframe is followed by the second subframe.
8. The method of claim 7 , wherein a multiplexing method for multiplexing multiple DPs in each subframe is applied to each subframe, respectively.