METHOD FOR RECORDING OF INTERACTIVE INFORMATION IN INTERACTIVE DIGITAL TELEVISION AND PLAYBACK THEREOF

摘要

When recording interactive television an interactive application (12) is stored separate from the audio-visual content of a transport stream (20). During recording correct synchronization between the audio/video content and the interactive application (12) must be guaranteed. The present invention uses a unique timing based validating attribute being recorded together with the application objects for synchronizing said audio-visual content with the thereto related interactive application objects. According to embodiments timestamps for when an item related to the interactive application is recorded, such as the AIT table, stream events etc. are used. During playback these timestamps are used to guarantee correct synchronization for stream events, DSMCC module version control and for application validation timing.