Broadcasting signal transmitting apparatus, broadcast signal receiving apparatus, and broadcast signal transceiving method in a broadcast signal transceiving apparatus
Disclosed is a broadcast signal transmitting apparatus, a broadcast signal receiving apparatus, and a broadcast signal transceiving method in a broadcast signal transceiving apparatus. The broadcast signal transmitting method comprises the following steps: compressing the headers of data packets of an IP stream identified by IP address information, wherein the compressed data packets include a first packet, the header of which contains static field information, a second packet, the header of which contains dynamic field information, and a third packet, the header of which contains the compressed static field information and/or the compressed dynamic field information; signaling IP-PLP mapping information for mapping the IP stream and a component PLP for transmitting the IP stream, the IP stream compression information, and the header information of the first packet to L2 signaling information; and transmitting the header information of the second and third packets via the component PLP, and transmitting the L2 signaling information via a common PLP.
1. A method of transmitting broadcast signals, the method comprising:
input processing input streams by compressing each header in Internet Protocol (IP) packets to output PLP (Physical Layer Pipe) data in each PLP;
encoding the PLP data;
encoding L1 (Layer 1) signaling information including PLP ID information indicating each PLP;
building a signal frame including the encoded PLP data and the encoded L1 signaling information,
wherein the signal frame further includes mapping information between IP packets and the PLPs transmitting at least one component of the broadcast stream, and compression information of the IP packets, wherein the compression information includes static information of at least one header before compression extracted from the IP packets with the compressed header;
modulating the built signal frame; and
transmitting the broadcast signals including the modulated signal frame.
2. The method of claim 1 , wherein the signal frame further includes bootstrap information for receiving service component information which is included in a specific PLP among PLPs in the signal frame.
3. The method of claim 1 , wherein the mapping information includes IP/UDP address information corresponding to the PLPs.
4. The method of claim 1 , wherein the compression information further includes header compression type information, context ID information and context profile information.
5. An apparatus of transmitting broadcast signals, the apparatus comprising:
an input processor to process input streams by compressing each header in Internet Protocol (IP) packets to output PLP (Physical Layer Pipe) data in each PLP;
an encoder to encode the PLP data;
a signaling encoder to encode L1 (Layer 1) signaling information including PLP ID information indicating each PLP;
a frame builder to build a signal frame including the encoded PLP data and the encoded L1 signaling information,
wherein the signal frame further includes mapping information between IP packets and the PLPs transmitting at least one component, and compression information of the IP packets, wherein the compression information includes static information of at least one header before compression extracted from the IP packets with the compressed header;
a modulator to modulate the built signal frame; and
a transmitter to transmit the broadcast signals including the modulated signal frame.
6. The apparatus of claim 5 , wherein the signal frame further includes bootstrap information for receiving service component information which is included in a specific PLP among PLPs in the signal frame.
7. The apparatus of claim 5 , wherein the mapping information includes IP/UDP address information corresponding to the PLPs.
8. The apparatus of claim 5 , wherein the compression information further includes header compression type information, context ID information and context profile information.