Broadcast signal transmitting method, broadcast signal receiving method, broadcast signal transmitting apparatus, and broadcast signal receiving apparatus

A digital transmitter for transmitting a broadcast signal, the digital transmitter comprising:

• a processor configured to generate at least one link layer packet,
• wherein the at least one link layer packet includes a header and a payload,
• wherein the header includes packet type information for indicating a type of input data before encapsulation into the at least one link layer packet, and first information,
• wherein when the packet type information is used to indicate a type extension, the header further includes packet type extension information for indicating a second type of input data different from the first type,
• wherein the header further includes either segmentation information or concatenation information depending on whether the payload carries a segment of a input packet or concatenated input packets,
• wherein the first information is used to indicate that the payload carries the segment of the input packet or the concatenated input packets,
• wherein when the payload carries the concatenated input packets, the header further includes count information for indicating a number of the concatenated input packets and a value of the count information is set to the number of the concatenated input packets minus two, and
• a transmitting module configured to transmit the broadcast signal including the at least one link layer packet.

A method for receiving a broadcast signal in a digital receiver, the method comprising:

• receiving the broadcast signal,
• wherein the broadcast signal includes at least one link layer packet;
• obtaining the at least one link layer packet,
• wherein the at least one link layer packet includes a header and a payload,
• wherein the header includes packet type information for indicating a first type of input data before encapsulation into the link layer packet, and first information,
• wherein when the packet type information is used to indicate a type extension, the header further includes packet type extension information for indicating a second type of input data different from the first type,
• wherein the header further includes either segmentation information or concatenation information depending on whether the payload carries a segment of a input packet or concatenated input packets,
• wherein the first information is used to indicate that the payload carries the segment of the input packet or the concatenated input packets, and
• wherein when the payload carries the concatenated input packets, the header further includes count information for indicating a number of the concatenated input packets and a value of the count information is set to the number of the concatenated input packets minus two.

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 at least one link layer packet;
• a processor configured to obtain the at least one link layer packet,
• wherein the at least one link layer packet includes a header and a payload,
• wherein the header includes packet type information for indicating a first type of input data before encapsulation into the link layer packet, and first information,
• wherein when the packet type information is used to indicate a type extension, the header further includes packet type extension information for indicating a second type of input data different from the first type,
• wherein the header further includes either segmentation information or concatenation information depending on whether the payload carries a segment of a input packet or concatenated input packets,
• wherein the first information is used to indicate that the payload carries the segment of the input packet or the concatenated input packets,
• wherein when the payload carries the concatenated input packets, the header further includes count information for indicating a number of the concatenated input packets and a value of the count information is set to the number of the concatenated input packets minus two.