Method and device for transmitting/receiving broadcast signal
A broadcasting transmitter for transmitting a broadcast signal according to an embodiment of the present invention comprises: an Internet protocol (IP) packet generator for generating first IP packets including broadcast data for a broadcast service and generating a second IP packet including service acquisition information that includes information required for quickly acquiring the broadcast service; a link layer packet generator for generating first link layer packets including the first IP packets; and a broadcast signal generator for generating a broadcast signal that includes the first link layer packets and the second IP packet.
1. A broadcast transmitter for transmitting a broadcast signal, the broadcast transmitter comprising:
an Internet protocol (IP) packet generator configured to generate one or more first IP packets including broadcast data for a broadcast service;
a packet generator configured to generate link layer packets including the one or more first IP packets,
wherein the link layer packets further include a compression information table for a compressed stream of the first IP packets,
wherein the compression information table includes a Physical Layer Pipe (PLP) identifier identifying a PLP, and
wherein the compression information table further includes a context identifier of the compressed stream and a maximum value of the context identifier to be used for the PLP; and
a broadcast signal transmitter configured to generate and transmit the broadcast signal including PLPs that carry the link layer packets.
2. The broadcast transmitter according to claim 1 , wherein the link layer packets include one or more second IP packets including service acquisition information that carry information necessary for fast acquisition of the broadcast service, and
wherein the service acquisition information includes information identifying an IP address of a channel for transmission of service layer signaling including information specifying the broadcast service.
3. The broadcast transmitter according to claim 2 , wherein the service acquisition information includes information identifying a PLP including the service layer signaling.
4. The broadcast transmitter according to claim 1 , wherein the link layer packets further include mapping information between IP addresses of the first IP packets and the PLPs.
5. A broadcast receiver for receiving a broadcast signal, the broadcast receiver comprising:
a receiver configured to receive the broadcast signal including Physical Layer Pipes (PLPs) that carry link layer packets,
wherein the link layer packets include one or more first Internet protocol (IP) packets including broadcast data for a broadcast service,
wherein the link layer packets further include a compression information table for a compressed stream of the first IP packets,
wherein the compression information table includes a PLP identifier identifying a PLP among the PLPs, and
wherein the compression information table further includes a context identifier of the compressed stream and a maximum value of the context identifier to be used for the PLP;
a processing unit configured to decode the link layer packets;
a signaling processing unit configured to decode the compression information table in the decoded link layer packets;
an IP packet processing unit configured to decompress the compressed stream based on the decoded compression information; and
a processor configured to reproduce the broadcast service using the broadcast data included in the decompressed stream.
6. The broadcast receiver according to claim 5 , wherein the link layer packets include one or more second IP packets including service acquisition information that carry information necessary for fast acquisition of the broadcast service, and
wherein the service acquisition information includes information identifying an IP address of a channel for transmission of service layer signaling including information specifying the broadcast service.
7. The broadcast receiver according to claim 6 , wherein the service acquisition information includes information identifying a PLP including the service layer signaling.
8. The broadcast receiver according to claim 5 , wherein the link layer packets further include mapping information between IP addresses of the first IP packets and the PLPs.