Transmission device and transmission method thereof, and reception device of connected transmission channels in a 13-segment format
View Patent ↗The present invention relates to a transmission device that enables transmission and reception of connected transmission channels in a 13-segment format and a transmission method of the transmission device, and to a reception device. The transmission device transmits connected transmission information that indicates that connected transmission of a plurality of transmission channels is being performed, and includes a field indicating that a 13-segment format is at least one segment format among the transmission channels being subjected to the connected transmission. The reception device receives the connected transmission information transmitted by the transmission device. The present invention can be applied to transmission devices that transmit terrestrial digital broadcast signals, for example.
1. A transmission device comprising:
a transmitter configured to transmit connected transmission information indicating that connected transmission of a plurality of transmission channels is being performed, the connected transmission information including a field describing that a segment format of a transmission channel is a 13-segment format, wherein the transmission channel in the 13-segment format is transmitted as at least one of the plurality of transmission channels, and
wherein the transmission device modulates a plurality of transport streams corresponding to the plurality of transmission channels by orthogonal frequency division multiplexing (OFDM) and synchronizes a plurality of OFDM signals corresponding to the plurality of transmission channels in a direction of a time axis.
2. The transmission device according to claim 1 , wherein the number of segments of the plurality of transmission channels being subjected to connected transmission is larger than 13.
3. The transmission device according to claim 1 , wherein
the connected transmission information is transmitted in the form of a connected transmission descriptor as control information for transport streams, and
the transmission device multiplexes the plurality of OFDM signals in a frequency direction, and transmits the multiplexed signals.
4. The transmission device according to claim 1 , wherein one of the plurality of transmission channels being subjected to connected transmission is a transmission channel in a 13-segment format.
5. The transmission device according to claim 4 , wherein another one of the plurality of transmission channels is a transmission channel in a one-segment format.
6. The transmission device according to claim 4 , wherein another one of the plurality of transmission channels is a transmission channel in a three-segment format.
7. The transmission device according to claim 4 , wherein another one of the plurality of transmission channels is a transmission channel in the 13-segment format.
8. The transmission device according to claim 4 , wherein the plurality of transmission channels further includes transmission channels in a one-segment format and a three-segment format.
9. The transmission device according to claim 1 , wherein the number of segments of the plurality of transmission channels being subjected to connected transmission is 33.
10. The transmission device according to claim 1 , wherein, in the connected transmission information, a value indicating a one-segment format, a three-segment format, or a 13-segment format is stored in the field indicating a segment format of each transmission channel being subjected to connected transmission.
11. The transmission device according to claim 10 , wherein, in the connected transmission information, the field indicating the segment format of each transmission channel being subjected to connected transmission is shown with 2-bit information, the 2-bit information being “00” when the segment format is the one-segment format, the 2-bit information being “01” when the segment format is the three-segment format, the 2-bit information being “10” when the segment format is the 13-segment format.
12. The transmission device according to claim 1 , wherein
the transmission channel in the 13-segment format can be subjected to layered transmission in three or more layers, and
the connected transmission information further includes a field identifying a modulation method type of each of the three or more layers.
13. A transmission method comprising:
transmitting, by a transmission device, connected transmission information indicating that connected transmission of a plurality of transmission channels is being performed, the connected transmission information including a field describing that a segment format of a transmission channel is a 13-segment format, wherein the transmission channel in the 13-segment format is transmitted as at least one of the plurality of transmission channels, and
wherein a plurality of transport streams corresponding to the plurality of transmission channels are modulated by orthogonal frequency division multiplexing (OFDM), and a plurality of OFDM signals corresponding to the plurality of transmission channels are synchronized in a direction of a time axis.
14. A reception device comprising:
a receiver configured to receive connected transmission information indicating that connected transmission of a plurality of transmission channels is being performed, the connected transmission information including a field describing that a segment format of a transmission channel is a 13-segment format, wherein the transmission channel in the 13-segment format is transmitted as at least one of the plurality of transmission channels, and
wherein signals of transport streams are generated by modulating a plurality of transport streams corresponding to the plurality of transmission channels by orthogonal frequency division multiplexing (OFDM), and a plurality of OFDM signals that are obtained as a result of the modulation and correspond to the plurality of transmission channels are synchronized in a direction of a time axis.
15. The reception device according to claim 14 , wherein the connected transmission information is received in the form of a connected transmission descriptor as control information for transport streams, and
the plurality of OFDM signals are multiplexed in a frequency direction.
16. The reception device according to claim 14 , wherein, based on the connected transmission information, control is performed to receive a desired transmission channel.
17. The transmission device according to claim 1 , wherein the transmitter is configured to perform connected transmission of up to 33 segments of transmission data formed by connecting at least one piece of transmission data in the 13-segment format, and other pieces of transmission data in different segment formats.
18. The transmission device according to claim 1 , wherein the 13-segment format corresponds to a piece of multimedia transmission data of the at least one of the plurality of transmission channels.