A transmitting apparatus including circuitry configured to generate caption data corresponding to content data and having elements defined in Extensible Markup Language (XML), and output the content data and the generated caption data to a reproducing device.

The present disclosure is directed to a system for provision of supporting content (SC). In general, a device may utilize event information to request SC from an SC provider, and may then present the SC concurrently with an occurrence of the event. The event information may comprise at least an event identifier and a SC provider locator. In response to the request, the SC provider may provide SC configuration data to the device. The SC configuration data may include at least a time, date and location data for the occurrence of the event. At least the time, date and location data may be used to identify an occurrence of the event, upon which the device may synchronize with a start time of the occurrence of the event. The SC may be provided to the device prior to the event or may be streamed during the occurrence of the event.

A method of processing a broadcast signal including an interactive broadcast service at a transmitter is disclosed. The method comprises generating an parameter table containing metadata about applications and interactive broadcast events targeted to the applications, dividing the parameter table into a plurality of parameter blocks, inserting each of the parameter blocks into each of a plurality of parameter table sections, generating a trigger which is a signaling element to identify signaling and establish timing of playout of the interactive broadcast events, inserting the trigger into a closed caption channel of the broadcast signal, transmitting the broadcast signal including the closed caption channel and a specific channel carrying the plurality of parameter table sections, wherein the trigger includes location information specifying a location of the parameter table in the broadcast signal.

A computer-implemented method performed in connection with a computerized system incorporating a processing unit and a memory, the computer-implemented method involving: using the processing unit to generate a multi-modal language model for co-occurrence of spoken words and displayed text in the plurality of videos; selecting at least a portion of a first video; extracting a plurality of spoken words from the selected portion of the first video; extracting a first displayed text from the selected portion of the first video; and using the processing unit and the generated multi-modal language model to rank the extracted plurality of spoken words based on probability of occurrence conditioned on the extracted first displayed text.