STREAMING MEDIA CONTROL AND SYNCHRONIZATION APPLICATION PROGRAM INTERFACE (API) FOR A DIGITAL TELEVISION RECEIVER

摘要

A streaming media control and synchronizationapplication program interface (API) for a digitaltelevision receiver. The API provides a simplealternative to the Java Media Framework for JavaTV andother television software environments, including theAdvanced Television Systems Committee Digital TVApplication Software Environment (ATSC T3/S17 DASE),and the Digital Video Broadcast Multimedia HomePlatform (DVB MHP). This API enables playing backmedia, and controlling the playback. The API includesa media presentation control package,"MediaComponentPresenter," and a service presenterhierarchy. The API controls stopping, starting,suspending and resuming the presentation of thestreaming audio and/or video at a media player, e.g.,at a television set-top receiver. The API alsoprovides a start method that attempts to synchronizethe presentation of audio and/or video streamsaccording to associated locators of the streams. TheAPI also can take checkpoints of the audio and/orvideo as it is playing, where the checkpoints indicatetemporal locations of the audio and/or video forinitiating a rewind operation.