| 主权项 |
1. A method of processing an interactive service at a first device, the method comprising:
sending a discovery message to a second screen application running in a second device, wherein the discovery message advertises second screen support services that the first device can provide; receiving a request for descriptions of the second screen support services from the second screen application; sending a response with the descriptions to the second screen application; receiving a trigger from a broadcast stream or an internet server; and delivering the trigger to the second device using a trigger service, wherein the trigger service is one of the second screen support services, wherein the trigger service is for delivering the trigger, wherein the trigger is a signaling element whose function is to identify signaling and establish timing of playout of interactive events targeted to applications for a segment described by an application parameter table, wherein the application parameter table contains metadata about the applications and the interactive events targeted to the applications for the segment described by the application parameter table, wherein the trigger is one of a time base trigger, an activation trigger, an interaction trigger or a channel change trigger, wherein the time base trigger is used to establish a time base for the event, wherein the activation trigger sets an activation time for the event, wherein the interaction trigger is used for interaction models other than a Triggered Declarative Object interaction model, wherein the channel change trigger is delivered whenever a channel is changed, combining information from the activation trigger with information from the application parameter table to generate an augmented activation trigger; sending the generated augmented activation trigger to the second screen application, wherein the trigger service offers a filtered stream option, wherein the filtered stream option is an option that delivering the trigger which is one of the augmented activation trigger, the interaction trigger or the channel change trigger, wherein the augmented activation trigger includes an event information representing an event element in the application parameter table, wherein the event element identified by the activation trigger represents the event for the application, wherein the event information includes an action information having same value with an action attribute of the event element identified by the activation trigger, and wherein the action attribute indicates type of an action to be applied when the event is activated. |
