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 L 2 signaling information; and transmitting the header information of the second and third packets via the component PLP, and transmitting the L 2 signaling information via a common PLP.
1. A method of transmitting broadcast data in a transmitting system, the method comprising;
compressing, by a compressor, each header in data packets of an Internet Protocol (IP) stream to obtain header-compressed data packets, wherein the header-compressed data packets comprise a first packet having a first header and a second packet having a second header, wherein the first header includes static information and dynamic information of a corresponding header before compression, and wherein the second header includes dynamic information of a corresponding header before compression;
generating, by a signaling generator, Layer 2 (L 2 ) signaling information to be carried in a Physical Layer Pipe (PLP) of multiple PLPs, wherein the L 2 signaling information includes first table information that contains the static information in the header-compressed data packets and compression information of the header-compressed data packets, wherein remainder of the multiple PLPs carry data in a payload of the header-compressed data packets, and wherein the first table information is used to decompress the header-compressed data packets in a receiving system;
encoding, by an encoder, data in the multiple PLPs;
interleaving, by an interleaver, the encoded data;
building, by a builder, a frame including the interleaved data; and
modulating, by a modulator, data in the frame by an Orthogonal Frequency Division Multiplexing (OFDM) method,
wherein the frame further includes preamble data that include Layer 1 (L 1 ) signaling information and wherein the L 1 signaling information includes information related to the encoding and the interleaving.
2. The method of claim 1 , wherein the L 2 signaling information further includes second table information and wherein the second table information includes mapping information between IP access information of the data packets and at least one PLP related to the data packets.
3. The method of claim 1 , wherein the compression information includes first context identification information of the IP stream and context profile information to indicate a range of protocols used to compress the IP stream.
4. The method of claim 3 , wherein the second table information further includes second context identification information providing a reference for the first context identification information provided in the second table information.
5. The method of claim 2 , wherein the second table information further includes information to indicate whether the header compression is applied to the data packets.
6. The method of claim 2 , wherein the mapping information includes IP address information and User Datagram Protocol (UDP) port information of the data packets and PLP identification to identify the at least one PLP related to the data packets.
7. A transmitting system for transmitting broadcast data, the transmitting system comprising;
a compressor to compress each header in data packets of an Internet Protocol (IP) stream to obtain header-compressed data packets, wherein the header-compressed data packets comprise a first packet having a first header and a second packet having a second header, wherein the first header includes static information and dynamic information of a corresponding header before compression, and wherein the second header includes dynamic information of a corresponding header before compression;
a signaling generator to generate Layer 2 (L 2 ) signaling information to be carried in a Physical Layer Pipe (PLP) of multiple PLPs, wherein the L 2 signaling information includes first table information that contains the static information in the header-compressed data packets and compression information of the header-compressed data packets, wherein remainder of the multiple PLPs carry data in a payload of the header-compressed data packets, and wherein the first table information is used to decompress the header-compressed data packets in a receiving system;
an encoder to encode data in the multiple PLPs;
an interleaver to interleave the encoded data;
a builder to build a frame including the interleaved data; and
a modulator to modulate data in the frame by an Orthogonal Frequency Division Multiplexing (OFDM) method,
wherein the frame further includes preamble data that include Layer 1 (L 1 ) signaling information and wherein the L 1 signaling information includes information related to the encoding and the interleaving.
8. The transmitting system of claim 7 , wherein the L 2 signaling information further includes second table information and wherein the second table information includes mapping information between IP access information of the data packets and at least one PLP related to the data packets.
9. The transmitting system of claim 7 , wherein the compression information includes first context identification information of the IP stream and context profile information to indicate a range of protocols used to compress the IP stream.
10. The transmitting system of claim 9 , wherein the second table information further includes second context identification information providing a reference for the first context identification information provided in the second table information.
11. The transmitting system of claim 8 , wherein the second table information further includes information to indicate whether the header compression is applied to the data packets.
12. The transmitting system of claim 8 , wherein the mapping information includes IP address information and User Datagram Protocol (UDP) port information of the data packets and PLP identification to identify the at least one PLP related to the data packets.