Receiving device, receiving method, transmitting device, and transmitting method

A receiving method of a receiving device, the receiving method comprising:

• acquiring a digital broadcast signal that includes audio-video (AV) content and location information, the location information indicating a source from which application control information is obtainable, the application control information being for controlling an operation of an application executed in conjunction with the AV content;
• acquiring the application control information from the source indicated by the location information, the application control information including a uniform resource locator (URL);
• obtaining, from the URL included in the acquired application control information, control information during a polling period that is defined in accordance with an attribute specified in the acquired application control information;
• and
• controlling the operation of the application based on the acquired application control information and the obtained control information.

A transmitting device comprising:

• circuitry configured to
• generate application control information for controlling an operation of an application executed in conjunction with audio-video (AV) content, the application control information including an attribute that defines a polling period specifying a timing for obtaining control information for controlling the operation of the application, and the application control information including a uniform resource locator (URL) for obtaining the control information;
• and
• generate location information indicating a source from which the application control information is obtainable;
• and
• a transmitter configured to transmit a digital broadcast signal that includes the AV content and the location information.

A transmitting method of a transmitting device, the transmitting method comprising:

• generating application control information for controlling an operation of an application executed in conjunction with audio-video (AV) content, the application control information including an attribute that defines a polling period specifying a timing for obtaining control information for controlling the operation of the application, and the application control information including a uniform resource locator (URL) for obtaining the control information;
• generating location information indicating a source from which the application control information is obtainable;
• and
• transmitting a digital broadcast signal that includes the AV content and the location information.