Method for transmitting broadcast signal and apparatus for transmitting broadcast signal

Abstract

A method for transmitting a broadcast signal in a digital transmitter includes generating a link layer packet; wherein the link layer packet includes at least one header and a payload, wherein the at least one header includes a packet type field, and the packet type field represents a type of input data before encapsulation into the link layer packet, wherein in response to the packet type field represents that the input data relates to an Internet Protocol (IP) packet, a first header includes payload configuration information, and the payload configuration information follows the packet type field while at least one field following the payload configuration information changes based on the payload configuration information, wherein a size of a second header included in the link layer packet as well as a field included in the second header are determined based on the payload configuration information, wherein the size of the second header is zero (0) byte, 1 byte or values more than the 1 byte based on the payload configuration information, wherein in response to the packet type field represents that the input data relates to the IP packet and a configuration indicating field included in the first header represents that the payload carries a segment of one input packet, the link layer packet includes a segment sequence number for representing an order of a corresponding segment carried by the link layer packet, wherein in response to the packet type field represents that the input data relates to the IP packet and the configuration indicating field included in the first header represents that the payload carries concatenated input packets, the link layer packet includes count information for representing the number of the concatenated input packets included in the link layer packet; and transmitting the broadcast signal including the link layer packet.

What is claimed is: 
     
         1 . A method for transmitting a broadcast signal in a digital transmitter, the method comprising:
 generating a link layer packet,   wherein the link layer packet includes at least one header and a payload,   wherein the at least one header includes a packet type field, and the packet type field represents a type of input data before encapsulation into the link layer packet,   wherein in response to the packet type field represents that the input data relates to an Internet Protocol (IP) packet, a first header includes payload configuration information, and the payload configuration information follows the packet type field while at least one field following the payload configuration information changes based on the payload configuration information,   wherein a size of a second header included in the link layer packet as well as a field included in the second header are determined based on the payload configuration information,   wherein the size of the second header is zero (0) byte, 1 byte or values more than the 1 byte based on the payload configuration information,   wherein in response to the packet type field represents that the input data relates to the IP packet and a configuration indicating field included in the first header represents that the payload carries a segment of one input packet, the link layer packet includes a segment sequence number for representing an order of a corresponding segment carried by the link layer packet, and   wherein in response to the packet type field represents that the input data relates to the IP packet and the configuration indicating field included in the first header represents that the payload carries concatenated input packets, the link layer packet includes count information for representing the number of the concatenated input packets included in the link layer packet; and   transmitting the broadcast signal including the link layer packet.   
     
     
         2 . The method of  claim 1 , wherein in response to the packet type field represents that the input data relates to a Movie Picture Experts Group-2 (MPEG-2) Transport Stream (TS) packet, a third header included in the link layer packet includes a deleted null packet indicator for representing the number of deleted null TS packets prior to the link layer packet, 
     
     
         3 . The method of  claim 2 , wherein the link layer packet includes at least one signaling table. 
     
     
         4 . The method of  claim 3 , wherein the at least one signaling table is used to provide information on a mapping relation between Physical Layer Pipes and data components related to a broadcast service. 
     
     
         5 . The method of  claim 4 , wherein the packet type field is configured to identify whether the IP packet corresponds to IPv4 packet or compressed IP packet, and an IP header compression scheme is provided to the IPv4 packet. 
     
     
         6 . A digital transmitter for transmitting a broadcast signal, the digital transmitter comprising:
 a processor configured to generate a link layer packet,   wherein the link layer packet includes at least one header and a payload,   wherein the at least one header includes a packet type field, and the packet type field represents a type of input data before encapsulation into the link layer packet,   wherein in response to the packet type field represents that the input data relates to an Internet Protocol (IP) packet, a first header includes payload configuration information, and the payload configuration information follows the packet type field while at least one field following the payload configuration information changes based on the payload configuration information,   wherein a size of a second header included in the link layer packet as well as a field included in the second header are determined based on the payload configuration information,   wherein the size of the second header is zero (0) byte, 1 byte or values more than the 1 byte based on the payload configuration information,   wherein in response to the packet type field represents that the input data relates to the IP packet and a configuration indicating field included in the first header represents that the payload carries a segment of one input packet, the link layer packet includes a segment sequence number for representing an order of a corresponding segment carried by the link layer packet, and   wherein in response to the packet type field represents that the input data relates to the IP packet and the configuration indicating field included in the first header represents that the payload carries concatenated input packets, the link layer packet further includes count information for representing the number of the concatenated input packets included in the link layer packet; and   a transmitter configured to transmit the broadcast signal including the link layer packet.   
     
     
         7 . The digital transmitter of  claim 6 , wherein in response to the packet type field represents that the input data relates to a Movie Picture Experts Group-2 (MPEG-2) Transport Stream (TS) packet, a third header included in the link layer packet includes a deleted null packet indicator for representing the number of deleted null TS packets prior to the link layer packet. 
     
     
         8 . The digital transmitter of  claim 7 , wherein the link layer packet includes at least one signaling table. 
     
     
         9 . The digital transmitter of  claim 8 , wherein the at least one signaling table is used to provide information on a mapping relation between Physical Layer Pipes and data components related to a broadcast service. 
     
     
         10 . The digital transmitter of  claim 9 , wherein the packet type field is configured to identify whether the IP packet corresponds to IPv4 packet or compressed IP packet, and an IP header compression scheme is provided to the IPv4 packet. 
     
     
         11 . A method for receiving a broadcast signal in a digital receiver, the method comprising:
 receiving the broadcast signal,   wherein the broadcast signal includes a link layer packet,   wherein the link layer packet includes at least one header and a payload,   wherein the at least one header includes a packet type field, and the packet type field represents a type of input data before encapsulation into the link layer packet,   wherein in response to the packet type field represents that the input data relates to an Internet Protocol (IP) packet, a first header includes payload configuration information, and the payload configuration information follows the packet type field while at least one field following the payload configuration information changes based on the payload configuration information,   wherein a size of a second header included in the link layer packet as well as a field included in the second header are determined based on the payload configuration information,   wherein the size of the second header is zero (0) byte, 1 byte or values more than the 1 byte based on the payload configuration information,   wherein in response to the packet type field represents that the input data relates to the IP packet and a configuration indicating field included in the first header represents that the payload carries a segment of one input packet, the link layer packet includes a segment sequence number for representing an order of a corresponding segment carried by the link layer packet, and   wherein in response to the packet type field represents that the input data relates to the IP packet and the configuration indicating field included in the first header represents that the payload carries concatenated input packets, the link layer packet includes count information for representing the number of the concatenated input packets included in the link layer packet; and   obtaining the input data based on the link layer packet.   
     
     
         12 . The method of  claim 11 , wherein in response to the packet type field represents that the input data relates to a Movie Picture Experts Group-2 (MPEG-2) Transport Stream (TS) packet, a third header included in the link layer packet includes a deleted null packet indicator for representing the number of deleted null TS packets prior to the link layer packet. 
     
     
         13 . The method of  claim 12 , wherein the link layer packet includes at least one signaling table. 
     
     
         14 . The method of  claim 13 , wherein the at least one signaling table is used to provide information on a mapping relation between Physical Layer Pipes and data components related to a broadcast service. 
     
     
         15 . The method of  claim 14 , wherein the packet type field is configured to identify whether the IP packet corresponds to IPv4 packet or compressed IP packet, and an IP header compression scheme is provided to the IPv4 packet. 
     
     
         16 . A digital receiver for receiving a broadcast signal, the digital receiver comprising:
 a receiving module configured to receive the broadcast signal,   wherein the broadcast signal includes a link layer packet,   wherein the link packet includes at least one header and a payload,   wherein the at least one header includes a packet type field, and the packet type field represents a type of input data before encapsulation into the link layer packet,   wherein in response to the packet type field represents that the input data relates to an Internet Protocol (IP) packet, a first header includes payload configuration information, and the payload configuration information follows the packet type field while at least one field following the payload configuration information changes based on the payload configuration information,   wherein a size of a second header included in the link layer packet as well as a field included in the second header are determined based on the payload configuration information,   wherein the size of the second header is zero (0) byte, 1 byte or values more than the 1 byte based on the payload configuration information,   wherein in response to the packet type field represents that the input data relates to the IP packet and a configuration indicating field included in the first header represents that the payload carries a segment of one input packet, the link layer packet includes a segment sequence number for representing an order of a corresponding segment carried by the link layer packet, and   wherein in response to the packet type field represents that the input data relates to the IP packet and the configuration indicating field included in the first header represents that the payload carries concatenated input packets, the link layer packet includes count information for representing the number of the concatenated input packets included in the link layer packet; and   a processor configured to obtain the input data based on the link layer packet.   
     
     
         17 . The digital receiver of  claim 16 , wherein in response to the packet type field represents that the input data relates to a Movie Picture Experts Group-2 (MPEG-2) Transport Stream (TS) packet, a third header included in the link layer packet includes a deleted null packet indicator for representing the number of deleted null TS packets prior to the link layer packet. 
     
     
         18 . The digital receiver of  claim 17 , wherein the link layer packet includes at least one signaling table. 
     
     
         19 . The digital receiver of  claim 18 , wherein the at least one signaling table is used to provide information on a mapping relation between Physical Layer Pipes and data components related to a broadcast service. 
     
     
         20 . The digital receiver of  claim 19 , wherein the packet type field is configured to
 identify whether the IP packet corresponds to IPv4 packet or compressed IP packet, and an IP header compression scheme is provided to the IPv4 packet.