Transmission apparatus, transmission method, reception apparatus, and reception method
View Patent ↗The present technology relates to a transmission apparatus, a transmission method, a reception apparatus, and a reception method that enable channel selection information and time information to be transmitted effectively. A transmission apparatus acquires channel selection information for selecting a service and time information used for synchronizations on a transmission side and a reception side, generates, as a physical layer frame constituted of a preamble and a data portion, the physical layer frame in which specific information including at least one of the channel selection information and the time information is arranged at a head of the data portion right after the preamble, and transmits the physical layer frame as digital broadcast signals. The present technology is applicable to IP packet broadcasting, for example.
1. A transmission apparatus, comprising:
circuitry configured to
acquire channel selection information for selecting a service;
acquire time information used for synchronizations on a transmission side and a reception side;
generate a physical layer frame, constituted of a preamble and a data portion, in which specific information including at least one of the channel selection information and the time information is arranged at a head part in the data portion right after the preamble, wherein the channel selection information is LLS (Low Layer Signaling) signaling information and the time information is NTP (Network Time Protocol); and
transmit the physical layer frame as digital broadcast signals.
2. The transmission apparatus according to claim 1 , wherein
the specific information is included in L2 signaling information arranged in a payload of a transmission packet that transmits an IP (Internet Protocol) packet, and
the transmission packet is transmitted as a first transmission packet of a first BB (Baseband) frame in the physical layer frame, wherein
the transmission packet and the first BB frame become a part of the data portion in the physical layer frame.
3. The transmission apparatus according to claim 1 , wherein
the specific information is included in L2 signaling information arranged in an extension header of a transmission packet that transmits an IP packet, and
the transmission packet is transmitted as a first transmission packet of a first BB frame in the physical layer frame, wherein
the transmission packet and the first BB frame become a part of the data portion in the physical layer frame.
4. The transmission apparatus according to claim 1 , wherein
the specific information is included in L1 signaling information arranged in an extension header of a BB frame, and
the BB frame is transmitted as a first BB frame of the physical layer frame, wherein
the BB frame becomes a part of the data portion in the physical layer frame.
5. A transmission method for a transmission apparatus, comprising:
by the transmission apparatus,
acquiring channel selection information for selecting a service;
acquiring time information used for synchronizations on a transmission side and a reception side;
generating a physical layer frame, constituted of a preamble and a data portion, in which specific information including at least one of the channel selection information and the time information is arranged at a head part in the data portion right after the preamble, wherein the channel selection information is LLS (Low Layer Signaling) signaling information and the time information is NTP (Network Time Protocol); and
transmitting the physical layer frame as digital broadcast signals.
6. A reception apparatus, comprising:
circuitry configured to
receive digital broadcast signals including a physical layer frame, constituted of a preamble and a data portion, in which specific information including at least one of channel selection information for selecting a service and time information used for synchronizations on a transmission side and a reception side is arranged at a head part in the data portion right after the preamble, wherein the channel selection information is LLS (Low Layer Signaling) signaling information and the time information is NTP (Network Time Protocol);
demodulate the physical layer frame;
acquire the specific information that is arranged at the head part in the data portion right after the preamble and includes at least one of the channel selection information and the time information; and
carry out predetermined processing on the basis of the specific information.
7. The reception apparatus according to claim 6 , wherein
the specific information is included in L2 signaling information arranged in a payload of a transmission packet that transmits an IP packet, and
the transmission packet is transmitted as a first transmission packet of a first BB frame in the physical layer frame, wherein
the transmission packet and the first BB frame become a part of the data portion in the physical layer frame.
8. The reception apparatus according to claim 6 , wherein
the specific information is included in L2 signaling information arranged in an extension header of a transmission packet that transmits an IP packet, and
the transmission packet is transmitted as a first transmission packet of a first BB frame in the physical layer frame, wherein
the transmission packet and the first BB frame become a part of the data portion in the physical layer frame.
9. The reception apparatus according to claim 6 , wherein
the specific information is included in L1 signaling information arranged in an extension header of a BB frame, and
the BB frame is transmitted as a first BB frame of the physical layer frame, wherein
the BB frame becomes a part of the data portion in the physical layer frame.
10. The reception apparatus according to claim 6 , wherein
the service is selected on the basis of the channel selection information.
11. The reception apparatus according to claim 6 , wherein a video and audio configuring the service are synchronized on the basis of the time information.
12. A reception method for a reception apparatus, comprising:
by the reception apparatus,
receiving digital broadcast signals including a physical layer frame, constituted of a preamble and a data portion, in which specific information including at least one of channel selection information for selecting a service and time information used for synchronizations on a transmission side and a reception side is arranged at a head part in the data portion right after the preamble, wherein the channel selection information is LLS (Low Layer Signaling) signaling information and the time information is NTP (Network Time Protocol);
demodulating the physical layer frame;
acquiring the specific information that is arranged at the head part in the data portion right after the preamble and includes at least one of the channel selection information and the time information; and
carrying out predetermined processing on the basis of the specific information.