Abstract: In the field of processing streams of audiovisual data, particularly multimedia data, a method for ordering the purchase of a service. A sequence that relates to the service is contained in a multimedia data stream played by a playback device. The multimedia data stream includes a plurality of sequences relating to respective services and associated with respective playback timestamps. The ordering method includes: determining a service identifier corresponding to a playback timestamp of a sequence associated with the service, the playback timestamp of the sequence associated with the service having been determined as a function of a timestamp of an order signal for purchasing a service, the order signal having been generated by a human-machine interface and transmitted by the human-machine interface to a management server distinct from a terminal receiving the multimedia data stream; the service identifier making it possible to generate a signal to save the purchase.

Abstract: A method of synchronization control in a synchronization gateway equipment is proposed. The method includes: receiving first metadata relating to a first audiovisual content, the metadata having an audiovisual content identifier, a first TV broadcast channel identifier, and time-and-date information; obtaining an identifier of a user interactivity element from the audiovisual content identifier; obtaining time-and-date information for presentation of a user interactivity element from the received time-and-date information; and transmitting, in synchronized manner with the time-and-date information for presentation of the interactivity element, a request for presentation of the user interactivity element corresponding to the identifier of the user interactivity element, the request including the identifier of the user interactivity element.

Abstract: A method of synchronization control in a synchronization gateway equipment is proposed. The method includes: receiving first metadata relating to a first audiovisual content, the metadata having an audiovisual content identifier, a first TV broadcast channel identifier, and time-and-date information; obtaining an identifier of a user interactivity element from the audiovisual content identifier; obtaining time-and-date information for presentation of a user interactivity element from the received time-and-date information; and transmitting, in synchronized manner with the time-and-date information for presentation of the interactivity element, a request for presentation of the user interactivity element corresponding to the identifier of the user interactivity element, the request including the identifier of the user interactivity element.