Broadcast signal transmitting apparatus, broadcasting data using FEC and methods thereof

Abstract

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.

The invention claimed is: 
     
       1. A method of processing broadcast data in a transmitter, the method comprising:
 input processing at least one an input stream to output one or multiple a first Physical Layer Pipes (PLPs) Pipe (PLP) by an input processor, wherein each headers of data packet of packets in the at least one input stream has a header and a payload and the header is compressed are compressed to generate a first packet, a second packet, and compressed packets, wherein a header of the first packet includes static chain information and first dynamic chain information, wherein a header of the second packet includes second dynamic chain information, wherein the static chain information, the first dynamic chain information, and the second dynamic chain information are carried through a second PLP, and wherein a first compressed packet converted from the first packet, a second compressed packet converted from the second packet, and the generated compressed packets are carried through the first PLP; 
 Forward Error Correction (FEC) encoding PLP data of the one or multiple first and second 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 an input stream to output one or multiple a first Physical Layer Pipes (PLPs) Pipe (PLP), wherein each headers of data packet of packets in the at least one input stream has a header and a payload and the header is compressed are compressed to generate a first packet, a second packet, and compressed packets, wherein a header of the first packet includes static chain information and first dynamic chain information, wherein a header of the second packet includes second dynamic chain information, wherein the static chain information, the first dynamic chain information, and the second dynamic chain information are carried through a second PLP, and wherein a first compressed packet converted from the first packet, a second compressed packet converted from the second packet, and the generated compressed packets are carried through the first PLP; 
 an encoder to Forward Error Correction (FEC) encode PLP data of the one or multiple first and second 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. 
     
     
       9. A broadcast signal transmitting method comprising:
 compressing headers of Internet Protocol (IP) packets included in an IP stream to generate a first packet, a second packet, and compressed packets, wherein the first packet includes static chain information and first dynamic chain information and wherein the second packet includes second dynamic chain information;   extracting the static chain information and first dynamic chain information from the first packet and converting the first packet to a first compressed packet, the first compressed packet having a sequence number that is matched with a sequence number in the first dynamic chain information;   extracting the second dynamic chain information from the second packet and converting the second packet to a second compressed packet, the second compressed packet having a sequence number that is matched with a sequence number in the second dynamic chain information; and   transmitting a broadcast signal including first Physical Layer Pipe (PLP) data delivered through a first PLP and second PLP data delivered through a second PLP that is different from the first PLP, wherein the first PLP data include the static chain information, the first dynamic chain information and the second dynamic chain information and wherein the second PLP data include the first compressed packet, the second compressed packet and the generated compressed packets.    
     
     
       10. The method of claim 9, wherein the first PLP data further include compression information for the compressing.  
     
     
       11. The method of claim 9, wherein the first packet is an Initialization Refresh (IR) packet and the second packet is an IR dynamic (IR-DYN) packet.  
     
     
       12. A broadcast signal transmitting apparatus comprising:
 a Robust Header Compression (RoHC) encoder to compress headers of Internet Protocol (IP) packets included in an IP stream to generate a first packet, a second packet, and compressed packets, wherein the first packet includes static chain information and first dynamic chain information and wherein the second packet includes second dynamic chain information;   a replacer to extract the static chain information and first dynamic chain information from the first packet and convert the first packet to a first compressed packet, the first compressed packet having a sequence number that is matched with a sequence number in the first dynamic chain information, and extract the second dynamic chain information from the second packet and convert the second packet to a second compressed packet, the second compressed packet having a sequence number that is matched with a sequence number in the second dynamic chain information; and   a transmitter to transmit a broadcast signal including first Physical Layer Pipe (PLP) data delivered through a first PLP and second PLP data delivered through a second PLP that is different from the first PLP, wherein the first PLP data include the static chain information, the first dynamic chain information and the second dynamic chain information and wherein the second PLP data include the first compressed packet, the second compressed packet and the generated compressed packets.    
     
     
       13. The apparatus of claim 12, wherein the first PLP data further include compression information for the decompressing.  
     
     
       14. The apparatus of claim 12, wherein the first packet is an Initialization Refresh (IR) packet and the second packet is an IR dynamic (IR-DYN) packet.  
     
     
       15. A broadcast signal receiving method comprising:
 receiving a broadcast signal including first Physical Layer Pipe (PLP) data delivered through a first PLP and second PLP data delivered through a second PLP that is different from the first PLP, wherein the first PLP data include static chain information and first dynamic chain information for recovering a first packet and second dynamic chain information for recovering a second packet and wherein the second PLP data include compressed packets;   recovering the first packet based on the static chain information and first dynamic chain information and a first compressed packet of the compressed packets, the first compressed packet having a sequence number that is matched with a sequence number in the first dynamic chain information;   recovering the second packet based on the second dynamic chain information and a second compressed packet of the compressed packets, the second compressed packet having a sequence number that is matched with a sequence number in the second dynamic chain information; and   performing decompressing based on the first packet and the second packet to generate an Internet Protocol (IP) packet stream including IP packets.    
     
     
       16. The method of claim 14, wherein the first PLP data further include compression information for the decompressing.  
     
     
       17. The method of claim 14, wherein the first packet is an Initialization Refresh (IR) packet and the second packet is an IR dynamic (IR-DYN) packet.  
     
     
       18. A broadcast signal receiving apparatus comprising:
 a receiver to receive a broadcast signal including first Physical Layer Pipe (PLP) data delivered through a first PLP and second PLP data delivered through a second PLP that is different from the first PLP, wherein the first PLP data include static chain information and first dynamic chain information for recovering a first packet and second dynamic chain information for recovering a second packet and wherein the second PLP data include compressed packets;   a replacer to recover the first packet based on the static chain information and first dynamic chain information and a first compressed packet of the compressed packets, the first compressed packet having a sequence number that is matched with a sequence number in the first dynamic chain information and recover the second packet based on the second dynamic chain information and a second compressed packet of the compressed packets, the second compressed packet having a sequence number that is matched with a sequence number in the second dynamic chain information; and   a Robust Header Compression (RoHC) decoder to perform decompressing based on the first packet and the second packet to generate an Internet Protocol (IP) packet stream including IP packets.    
     
     
       19. The apparatus of claim 18, wherein the first PLP data further include compression information for the decompressing.  
     
     
       20. The apparatus of claim 18, wherein the first packet is an Initialization Refresh (IR) packet and the second packet is an IR dynamic (IR-DYN) packet.