Reception device, reception method, transmission device, and transmission method

1. A reception device, comprising:

circuitry configured to

acquire second metadata including a flag, the flag indicating whether or not there is a component stream transmitted from a server via the Internet for a service;

acquire first metadata based on the second metadata, the first metadata including information related to a component stream for the service transmitted in a broadcast signal using an Internet Protocol (IP) transmission scheme; and

access the component stream transmitted in the broadcast signal based on the first metadata, and control reproduction of the component stream transmitted in the broadcast signal, wherein

when the flag indicates that there is the component stream transmitted from the server via the Internet for the service, the circuitry is configured to

access the component stream transmitted from the server via the Internet, and

control reproduction of the component stream transmitted in the broadcast signal together with the component stream transmitted from the server via the Internet.

2. The reception device according to claim 1 ,

wherein, when the flag indicates that there is no component stream transmitted via the Internet, the circuitry accesses the component stream transmitted in the broadcast signal and controls the reproduction of the component stream transmitted in the broadcast signal based on the first metadata.

3. The reception device according to claim 1 ,

wherein, when the flag indicates that there is the component stream transmitted via the Internet, the circuitry acquires third metadata for managing reproduction of the component stream transmitted via the Internet, and

the circuitry accesses the component stream transmitted in the broadcast signal and the component stream transmitted via the Internet and controls reproduction of the component streams transmitted in the broadcast signal and via the Internet based on the first metadata and the third metadata.

4. The reception device according to claim 1 ,

wherein the first metadata is first signaling data transmitted through a layer higher than an IP layer in a protocol stack of the IP transmission scheme, and

the second metadata is second signaling data transmitted through a layer lower than the IP layer in the protocol stack of the IP transmission scheme.

5. The reception device according to claim 4 ,

wherein the component stream transmitted in the broadcast signal and a stream of the first signaling data are transmitted through a Real-time Object Delivery over Unidirectional Transport (ROUTE) session extended from a File Delivery over Unidirectional Transport (FLUTE).

6. The reception device according to claim 5 ,

wherein the service includes the component stream transmitted in the broadcast signal and the first signaling data to which a common IP address is allocated, and

the component stream transmitted in the broadcast signal and the first signaling data are transmitted through different Base Band Packet (BBP) streams.

7. The reception device according to claim 4 ,

wherein the circuitry is configured to acquire the first signaling data transmitted in the broadcast signal or via the Internet.

8. The reception device according to claim 1 ,

wherein the component stream transmitted in the broadcast signal is a video stream, an audio stream, or subtitles stream, and

the service is a program.

9. The reception device according to claim 1 ,

wherein the first metadata is an LCT Session Instance Description (LSID), and

the second metadata is a Service Configuration Description (SCD).

10. A reception method of a reception device, comprising:

acquiring, by circuitry of the reception device, second metadata including a flag, the flag indicating whether or not there is a component stream transmitted from a server via the Internet for a service;

acquiring, by the circuitry, first metadata based on the second metadata, the first metadata including information related to a component stream for the service transmitted in a broadcast signal using an Internet Protocol (IP) transmission scheme; and

accessing, by the circuitry, the component stream transmitted in the broadcast signal based on the first metadata, and controlling reproduction of the component stream transmitted in the broadcast signal, wherein

when the flag indicates that there is the component stream transmitted from the server via the Internet for the service, the method further comprises

accessing the component stream transmitted from the server via the Internet, and

controlling reproduction of the component stream transmitted in the broadcast signal together with the component stream transmitted from the server via the Internet.

11. A transmission device, comprising:

circuitry configured to

generate second metadata including a flag, the flag indicating whether or not there is a component stream transmitted from a server via the Internet for a service; and

transmit the generated second metadata to a reception device, wherein

when the flag indicates that there is the component stream transmitted from the server via the Internet for the service, the reception device

accesses the component stream transmitted from the server via the Internet,

accesses a component stream for the service transmitted in a broadcast signal using an Internet Protocol (IP) transmission scheme based on first metadata including information related to the component stream for the service transmitted in a broadcast signal, and

controls reproduction of the component stream transmitted in the broadcast signal together with the component stream transmitted from the server via the Internet.

12. The transmission device according to claim 11 ,

wherein the first metadata is first signaling data transmitted through a layer higher than an IP layer in a protocol stack of the IP transmission scheme, and

the second metadata is second signaling data transmitted through a layer lower than the IP layer in the protocol stack of the IP transmission scheme.

13. The transmission device according to claim 12 ,

wherein the component stream transmitted in the broadcast signal and a stream of the first signaling data are transmitted through a Real-time Object Delivery over Unidirectional Transport (ROUTE) session extended from a File Delivery over Unidirectional Transport (FLUTE).

14. The transmission device according to claim 13 ,

wherein the service includes the component stream transmitted in the broadcast signal and the first signaling data to which a common IP address is allocated, and

the component stream transmitted in the broadcast signal and the first signaling data are transmitted through different Base Band Packet (BBP) streams.

15. A transmission method of a transmission device, comprising:

generating, by circuitry of the transmission device, second metadata including a flag, the flag indicating whether or not there is a component stream transmitted from a server via the Internet for a service; and

transmitting, by the circuitry, the generated second metadata to a reception device, wherein

when the flag indicates that there is the component stream transmitted from the server via the Internet for the service, the reception device

accesses the component stream transmitted from the server via the Internet,

accesses a component stream for the service transmitted in a broadcast signal using an Internet Protocol (IP) transmission scheme based on first metadata including information related to the component stream for the service transmitted in a broadcast signal, and

controls reproduction of the component stream transmitted in the broadcast signal together with the component stream transmitted from the server via the Internet.