Broadcast signal transmitting apparatus, broadcasting data using FEC and methods thereof
Disclosed are a broadcast signal transmitting apparatus, a broadcast signal receiving apparatus, and a broadcast signal transceiving method in the broadcast signal transmitting and receiving apparatuses. The broadcast signal transmitting method comprises the steps of: compressing headers of data packets which are included in an Internet protocol (IP) stream identified by access information, wherein the compressed data packets include a first packet containing both static information and dynamic information in the header thereof, and a second packet containing dynamic information in the header thereof; splitting the static information from the header of the first packet and diverting the remaining part thereof into the second packet; outputting an IP stream, which includes the second packet, via a data physical layer pipe (PLP); outputting, via a common PLP, a common stream, which includes the static information of the header of the first packet split in the previous step, compression information and IP-PLP mapping information for linking the IP stream and the data PLP; generating a signal frame on the basis of the data from the data PLP and the data of the common PLP; and transmitting a broadcast signal which includes the signal frame.
1. A method of processing broadcast data in a transmitter, the method comprising:
input processing at least one input stream to output one or multiple Physical Layer Pipes (PLPs) by an input processor, wherein each data packet of the at least one input stream has a header and a payload and the header is compressed;
Forward Error Correction (FEC) encoding PLP data of the one or multiple PLPs for each PLP by an encoder;
bit interleaving the FEC-encoded PLP data by a bit interleaver;
time interleaving the bit-interleaved PLP data by a time interleaver;
building a signal frame including the time-interleaved PLP data by a frame builder;
inserting pilot data into the built signal frame by an inserter; and
modulating the signal frame having the pilot data by a modulator,
wherein the signal frame further includes signaling data, and wherein the signaling data include type information for indicating a type of the input stream.
2. The method of claim 1 , wherein when the type information indicates that the input stream is an IP stream, the each data packet is equal to an Internet Protocol (IP) packet.
3. The method of claim 1 , further comprising:
frequency interleaving the time-interleaved PLP data.
4. The method of claim 1 , wherein the signal frame further includes pilot data information related to pilot pattern information of the pilot data.
5. A transmitter for processing broadcast data, the transmitter comprising:
an input processor to process at least one input stream to output one or multiple Physical Layer Pipes (PLPs), wherein each data packet of the at least one input stream has a header and a payload and the header is compressed;
an encoder to Forward Error Correction (FEC) encode PLP data of the one or multiple PLPs for each PLP;
a bit interleaver to bit interleave the FEC-encoded PLP data;
a time interleaver to time interleave the bit-interleaved PLP data;
a frame builder to build a signal frame including the time-interleaved PLP data;
an inserter to insert pilot data into the built signal frame; and
a modulator to modulate the signal frame having the pilot data,
wherein the signal frame further includes signaling data, and wherein the signaling data include type information for indicating a type of the input stream.
6. The transmitter of claim 5 , when the type information indicates that the input stream is an IP stream, the each data packet is equal to an Internet Protocol (IP) packet.
7. The transmitter of claim 5 , further comprising:
a frequency interleaver to frequency interleave the time-interleaved PLP data.
8. The transmitter of claim 5 , wherein the signal frame further includes pilot data information related to pilot pattern information of the pilot data.