Broadcast signal transmission device, broadcast signal reception device, broadcast signal transmission method, and broadcast signal reception method
The present disclosure comprises: a demodulation unit for receiving a broadcast signal including a signal frame divided into a bootstrap area, a preamble area, and a data area, and demodulating the received broadcast signal according to an OFDM scheme; a frame parsing unit for parsing the signal frame from the demodulated broadcast signal; an L1 signaling processing unit for processing preamble data received in the preamble area of the parsed signal frame, and extracting L1 signaling data including time information; a physical layer pipe (PLP) data processing unit for processing PLP data of at least one PLP received in the data area of the parsed signal frame, and extracting at least one data packet; and a container encapsulation unit for generating a first container including the extracted time information, and generating a second container including the at least one extracted data packet, wherein each of the first container and the second container includes a first header, a second header, and a payload, the first header includes start position information indicating a start position of a corresponding container, start position information of the first container and start position information of the second container have the same value, and the second header includes container identification information for distinguishing the first container and the second container.
1. A method of receiving a broadcast signal, the method comprising:
receiving the broadcast signal including Layer 1 (L1) signaling data and Physical Layer Pipe (PLP) data of at least one PLP;
processing the L1 signaling data and outputting time information;
processing the PLP data and outputting at least one data packet; and
generating a first container including the time information and generating a second container including the at least one data packet,
wherein the first container includes a first header and a first payload,
wherein the first header includes first start point information for indicating a start point of the first container and first container identification information for identifying the first container,
wherein the second container includes a second header and a second payload, and
wherein the second header includes second start point information for indicating a start point of the second container and second container identification information for identifying the second container.
2. The method of claim 1 , wherein the first start point information and the second start point information have a same value.
3. The method of claim 1 ,
wherein the first header includes a time mode field including the first container identification information and a time information field including the time information, and
wherein the second header includes a time mode field including the second container identification information but does not include a time information field including the time information.
4. The method of claim 3 , wherein the time mode field included in the first header includes a time flag field for indicating that the first container is a time information container and a time type field for indicating a precision of the time information included in the time information field, and
wherein the time information field included in the first header includes time information of a precision indicated by the time type field.
5. The method of claim 3 , wherein the time mode field included in the second header includes a time flag field for indicating that the second container is a data container and a time type field including dummy data.
6. The method of claim 1 , wherein the first header further includes first error indication information for indicating an error presence in the L1 signaling data, and
wherein the second header further includes second error indication information for indicating an error presence in the at least one data packet.
7. The method of claim 1 , wherein the second header further includes PLP identification information for identifying a PLP to which the at least one data packet belongs and length identification information for identifying a length of the at least one data packet.
8. The method of claim 1 ,
wherein the first payload includes debugging information for debugging and
wherein the second payload includes the at least one data packet.
9. The method of claim 1 , further comprising:
receiving a container; and
identifying whether the received container is the first container or the second container based on the container identification information included in the received container,
wherein the time information is extracted from the identified container when the identified container is the first container and
wherein the at least one data packet is extracted from the identified container when the identified container is the second container.
10. An apparatus for receiving a broadcast signal, the apparatus comprising:
a receiver to receive the broadcast signal including Layer 1 (L1) signaling data and Physical Layer Pipe (PLP) data of at least one PLP;
a L1 signaling processor to process the L1 signaling data and output time information;
a PLP processor to process the PLP data and output at least one data packet; and
a container encapsulator to generate a first container including the time information and generate a second container including the at least one data packet,
wherein the first container includes a first header and a first payload,
wherein the first header includes first start point information for indicating a start point of the first container and first container identification information for identifying the first container,
wherein the second container includes a second header and a second payload, and
wherein the second header includes second start point information for indicating a start point of the second container and second container identification information for identifying the second container.
11. The apparatus of claim 10 , wherein the first start point information and the second start point information have a same value.
12. The apparatus of claim 10 , wherein the first header includes a time mode field including the first container identification information and a time information field including the time information, and
wherein the second header includes a time mode field including the second container identification information but does not include a time information field including the time information.
13. The apparatus of claim 12 , wherein the time mode field included in the first header includes a time flag field for indicating that the first container is a time information container and a time type field for indicating a precision of the time information included in the time information field, and
wherein the time information field included in the first header includes time information of a precision indicated by the time type field.
14. The apparatus of claim 12 , wherein the time mode field included in the second header includes a time flag field for indicating that the second container is a data container and a time type field including dummy data.
15. The apparatus of claim 10 , wherein the first header further includes first error indication information for indicating an error presence in the L1 signaling data, and
wherein the second header further includes second error indication information for indicating an error presence in the at least one data packet.
16. The apparatus of claim 10 ,
wherein the first payload includes debugging information for debugging and
wherein the second payload includes the at least one data packet.
17. The apparatus of claim 10 , further comprising:
a system decoder to receive a container and identify whether the received container is the first container or the second container based on the container identification information included in the received container,
wherein the system decoder extracts the time information from the identified container when the identified container is the first container and
wherein the system decoder extracts the at least one data packet from the identified container when the identified container is the second container.