Method and device for transmitting/receiving broadcast signal
A broadcast receiver for receiving a broadcast signal includes a receiver for receiving the broadcast signal including Physical Layer Pipe(PLP)s, wherein the PLPs carry link layer packets and wherein the link layer packets include one or more Internet protocol (IP) packets, a packet decoder for decoding the link layer packets from the PLPs, wherein the link layer packets include a compression information table related to a header-compressed stream of a first group of IP packets among the IP packets, and wherein the compression information table includes a PLP identifier identifying a PLP among the PLPs, a maximum value of an context identifier of the header-compressed stream, and a context profile being a range of protocols used for the header-compressed stream, a signaling decoder for decoding the compression information table in the decoded link layer packets, and a decompressor for decompressing the header-compressed stream to output the first group of IP packets.
1. A broadcast receiver comprising:
a tuner configured to receive a broadcast signal including Physical Layer Pipes (PLPs),
wherein the PLPs carry link layer packets; and
a controller coupled to the tuner,
wherein the controller is configured to:
decode a specific PLP,
acquire signaling information for header compression,
wherein the signaling information for header compression includes a PLP identifier for the signaling information for header compression, a context profile for a range of protocols used to compress at least one stream, and a maximum value of a context identifier,
decode another PLP to receive the at least one compressed stream based on the signaling information for header compression, and
decompress the at least one compressed stream.
2. The broadcast receiver according to claim 1 , wherein the link layer packets include one or more Internet Protocol (IP) packets carrying service acquisition information, and
wherein the service acquisition information includes information necessary for fast acquisition of a broadcast service.
3. The broadcast receiver according to claim 2 , wherein the link layer packets further include mapping information between IP addresses of the one or more IP packets and the PLPs.
4. A method for receiving at least one broadcast signal in a broadcast receiver, the method comprising:
receiving the at least one broadcast signal including Physical Layer Pipes (PLPs) in a tuner,
wherein the PLPs carry link layer packets; decoding a specific PLP;
acquiring signaling information for header compression, wherein the signaling information for header compression includes a PLP identifier for the signaling information for header compression, a context profile for a range of protocols used to compress at least one stream, and a maximum value of a context identifier;
decoding another PLP to receive the at least one compressed stream based on the signaling information for header compression; and
decompressing the at least one compressed stream.
5. The method according to claim 4 , wherein the link layer packets include one or more Internet Protocol (IP) packets carrying service acquisition information, and
wherein the service acquisition information includes information necessary for fast acquisition of a broadcast service.
6. The method according to claim 5 , wherein the link layer packets further include mapping information between IP addresses of the one or more of IP packets and the PLPs.
7. A method for transmitting a broadcast signal in a broadcast transmitter, the method comprising:
processing at least one Internet Protocol (IP) packet;
generating at least one link layer packet based on the at least one IP packet,
wherein the generating further comprises generating a compression information table for a header compression,
wherein the compression information table for the header compression includes a Physical Layer Pipe (PLP) identifier for identifying at least one PLP, and
wherein the compression information table for the header compression further includes a maximum value of a context identifier of a compressed IP stream to be used for the at least one PLP; and
transmitting the broadcast signal including the at least one PLP that carries the at least one link layer packet.