Reception apparatus, transmission apparatus, and data processing method
The present technology relates to a reception apparatus, a transmission apparatus, and a data processing method that enable a frequency scan to be performed at a higher speed. The reception apparatus can receive a broadcast wave, perform the frequency scan on the broadcast wave on the basis of the number of providers information indicating the number of broadcasting providers providing a service in the same frequency band, and generate channel selection information for selecting the service, thereby enabling the frequency scan at a higher speed. The present technology is applicable to, for example, a receiver capable of receiving digital broadcasting.
1. A reception apparatus comprising:
circuitry configured to:
receive one or more low level signaling (LLS) tables that include one or more respective service list tables (SLTs) from a first LLS stream in a broadcast stream, each of the one or more LLS tables including a provider identifier indicating a provider with which the respective LLS table is associated, and a numerical parameter indicating a number of different provider identifiers included in the first LLS stream;
upon receipt of each one of the one or more LLS tables,
determine receipt of a first set of service list information from the first LLS stream is completed in a case that currently received LLS table or tables have a current number of different provider identifiers reaching the number of different provider identifiers indicated by the numerical parameter, and
determine the receipt of the first set of service list information from the first LLS stream is completed in a case that a maximum transmission period after receipt of a first one of the one of the one or more LLS tables has elapsed and the current number of different provider identifiers has not reached the number of different provider identifiers indicated by the numerical parameter;
receive a second set of service list information from a second LLS stream instead of the first LLS stream in response to the receipt of the first set of service list information from the first LLS stream being determined as completed; and
generate service information based on the first set of service list information and the second set of service list information.
2. The reception apparatus according to claim 1 , wherein one of the one or more LLS tables from the first LLS stream includes:
a header part that includes a table identifier and the numerical parameter; and
a payload part that includes one of the SLTs, which includes a piece of service list information indicating one or more services that are provided in the broadcast stream.
3. The reception apparatus according to claim 2 , wherein
the one of the one or more LLS tables is transmitted in a user datagram protocol (UDP) over an Internet Protocol (IP) packet stream, and
the one of the one or more LLS tables is identified with a fixed IP address and a fixed port number.
4. The reception apparatus according to claim 2 , wherein the header part of the one of the one or more LLS tables further includes:
table version information indicating a version of the one of the one or more LLS tables.
5. The reception apparatus according to claim 1 , wherein the first LLS stream is included in a physical layer pipe (PLP) in the broadcast stream.
6. A data processing method for a reception apparatus, the data processing method comprising:
receiving, by circuitry of the reception apparatus, one or more low level signaling (LLS) tables that include one or more respective service list tables (SLTs) from a first LLS stream in a broadcast stream, each of the one or more LLS tables including a provider identifier indicating a provider with which the respective LLS table is associated, and a numerical parameter indicating a number of different provider identifiers included in the first LLS stream;
upon receipt of each one of the one or more LLS tables,
determining, by the circuitry of the reception apparatus, receipt of a first set of service list information from the first LLS stream is completed in a case that currently received LLS table or tables have a current number of different provider identifiers reaching the number of different provider identifiers indicated by the numerical parameter, and
determining the receipt of the first set of service list information from the first LLS stream is completed in a case that a maximum transmission period after receipt of a first one of the one of the one or more LLS tables has elapsed and the current number of different provider identifiers has not reached the number of different provider identifiers indicated by the numerical parameter;
receiving, by the circuitry of the reception apparatus, a second set of service list information from a second LLS stream instead of the first LLS stream in response to the receipt of the first set of service list information from the first LLS stream being determined as completed; and
generating, by the circuitry of the reception apparatus, service information based on the first set of service list information and the second set of service list information.
7. The data processing method according to claim 6 , wherein one of the one or more LLS tables from the first LLS stream includes:
a header part that includes a table identifier and the numerical parameter; and
a payload part that includes one of the SLTs, which includes a piece of service list information indicating one or more services that are provided in the broadcast stream.
8. A transmission apparatus comprising:
circuitry configured to:
generate one or more low level signaling (LLS) tables that include one or more respective service list tables (SLTs) to be transmitted via a first LLS stream in a broadcast stream, each of the one or more LLS tables including a provider identifier indicating a provider with which the respective LLS table is associated, and a numerical parameter indicating a number of different provider identifiers included in the first LLS stream; and
transmit the generated one or more LLS tables via the first LLS stream in the broadcast stream,
wherein the one or more LLS tables cause a reception apparatus to switch from receiving a first set of service list information from the first LLS stream to receiving a second set of service list information from a second LLS stream in response to the reception apparatus determining reception of the first set of service list information from the first LLS stream is completed (i) in a case that received LLS table or tables received by the reception apparatus have a current number of different provider identifiers reaching the number of different provider identifiers indicated by the numerical parameter, and (ii) in a case that a maximum transmission period after receipt of a first one of the one of the one or more LLS tables has elapsed and the current number of different provider identifiers has not reached the number of different provider identifiers indicated by the numerical parameter.
9. The transmission apparatus according to claim 8 , wherein one of the one or more LLS tables includes:
a header part that includes a table identifier and the numerical parameter; and
a payload part that includes one of the SLTs, which includes a piece of service list information indicating one or more services that are provided in the broadcast stream.
10. The transmission apparatus according to claim 9 , wherein
the one of the one or more LLS tables is transmitted in a user datagram protocol (UDP) over an Internet Protocol (IP) packet stream, and
the one of the one or more LLS tables is identified with a fixed IP address and a fixed port number.
11. A data processing method for a transmission apparatus, the data processing method comprising:
generating one or more low level signaling (LLS) tables that include one or more respective service list tables (SLTs) to be transmitted via a first LLS stream in a broadcast stream, each of the one or more LLS tables including a provider identifier indicating a provider with which the respective LLS table is associated, and a numerical parameter indicating a number of different provider identifiers included in the first LLS stream; and
transmitting the generated one or more LLS tables via the first LLS stream in the broadcast stream,
wherein the one or more LLS tables cause a reception apparatus to switch from receiving a first set of service list information from the first LLS stream to receiving a second set of service list information from a second LLS stream in response to the reception apparatus determining reception of the first set of service list information from the first LLS stream is completed (i) in a case that received LLS table or tables received by the reception apparatus have a current number of different provider identifiers reaching the number of different provider identifiers indicated by the numerical parameter and (ii) in a case that a maximum transmission period after receipt of a first one of the one of the one or more LLS tables has elapsed and the current number of different provider identifiers has not reached the number of different provider identifiers indicated by the numerical parameter.
12. The data processing method according to claim 11 , wherein one of the one or more LLS tables includes:
a header part that includes a table identifier and the numerical parameter; and
a payload part that includes one of the SLTs, which includes a piece of service list information indicating one or more services that are provided in the broadcast stream.