Transmission device, transmission method, reception device, and reception method
The present technology relates to a transmission device, a transmission method, a reception device, and a reception method that can improve transmission efficiency. An encoded signal is generated based on realtime data indicated by a waveform L using a predetermined fixed bit rate as a maximum code amount Sx and the encoded signal into which non-realtime data with an insufficient code amount is inserted is transmitted at the fixed bit rate, as indicated by a range Z12, when a code amount of the generated encoded signal is insufficient for the maximum code amount Sx. The present technology can be applied to broadcasting communication.
1. A transmission device, comprising:
circuitry configured to control:
generation of a data frame which includes a first header and first data packets, the data frame including realtime (RT) data and non-realtime (NRT) data, and the first header including a pointer indicating a beginning position of one of the first data packets in the data frame; and
transmission of the data frame.
2. The transmission device according to claim 1 ,
wherein each of the first data packets includes a respective second header and a respective data payload.
3. The transmission device according to claim 2 ,
wherein a configuration of the second header of a particular first data packet of the first data packets specifies one of a plurality of length modes, indicating a corresponding maximum length of the data payload of the particular first data packet.
4. The transmission device according to claim 2 ,
wherein the second header of a particular first data packet of the first data packets includes a plurality of types of headers, at least one of the plurality of types of headers indicating a variable length of the data payload of the particular first data packet.
5. The transmission device according to claim 2 ,
wherein the second header of a particular first data packet of the first data packets includes a plurality of types of headers, at least one of the plurality of types of headers indicating that the data payload of the particular first data packet includes one of fragments of an input packet.
6. The transmission device according to claim 1 ,
wherein a code amount of the NRT data included in the data frame is determined based on a code amount of the RT data included in the data frame.
7. A transmission method, comprising:
generating, by circuitry of a transmission device, a data frame which includes a first header and first data packets, the data frame including realtime (RT) data and non-realtime (NRT) data, and the first header including a pointer indicating a beginning position of one of the first data packets in the data frame; and
transmitting the data frame.
8. A reception device, comprising:
circuitry configured to control:
reception of a data frame which includes a first header and first data packets, the data frame including realtime (RT) data and non-realtime (NRT) data, and the first header including a pointer indicating a beginning position of one of the first data packets in the data frame; and
obtainment of the RT data and the NRT data from the data frame.
9. The reception device according to claim 8 ,
wherein each of the first data packets includes a respective second header and a respective data payload.
10. The reception device according to claim 9 ,
wherein a configuration of the second header of a particular first data packet of the first data packets specifies one of a plurality of length modes indicating a corresponding maximum length of the data payload of the particular first data packet.
11. The reception device according to claim 9 ,
wherein the second header of a particular first data packet of the first data packets includes a plurality of types of headers, at least one of the plurality of types of headers indicating a variable length of the data payload of the particular first data packet.
12. The reception device according to claim 9 ,
wherein the second header of a particular first data packet of the first data packets includes a plurality of types of headers, at least one of the plurality of types of headers indicating that the data payload of the particular first data packet includes one of fragments of an input packet.
13. The reception device according to claim 9 ,
wherein the second header of a particular first data packet of the first data packets includes one or more of three types of headers, presence of two of the three types of headers indicating a variable length of the data payload of the particular first data packet.
14. The reception device according to claim 8 ,
wherein a code amount of the NRT data included in the data frame is determined based on a code amount of the RT data included in the data frame.
15. The reception device according to claim 8 ,
wherein a code amount of the NRT data included in the data frame is determined based on a code amount of the RT data included in the data frame and a bit rate of a physical layer in which the data frame is transmitted.
16. The reception device according to claim 14 ,
wherein the data frame includes null data inserted therein, the null data being inserted into the data frame based on the code amount of the NRT data and the code amount of the RT data.
17. A reception method, comprising:
receiving a data frame which includes a first header and first data packets, the data frame including realtime (RT) data and non-realtime (NRT) data, and the first header including a pointer indicating a beginning position of one of the first data packets in the data frame; and
obtaining the RT data and the NRT data from the data frame.
18. The reception method according to claim 17 ,
wherein each of the first data packets includes a respective second header and a respective data payload.
19. The reception method according to claim 17 ,
wherein a code amount of the NRT data included in the data frame is determined based on a code amount of the RT data included in the data frame.
20. The reception method according to claim 17 ,
wherein a code amount of the NRT data included in the data frame is determined based on a code amount of the RT data included in the data frame and a bit rate of a physical layer in which the data frame is transmitted.