trigg&link a new dimension in television program making
The merge of internet and television broadcast is discussed at application level: how can internet contribute to television other than Web-surfing? Two main service types were identified. Both relate to television program making. The first refers to the hyperlinking nature of the internet. It led to the concept of trigg&link where a linear, non-interactive television program is enhanced into a linear (parallel), interactive program. The second refers to using internet services within the television program, where the internet services are on a higher level than plain Web-surfing. The enhancement they provide is found in the additional information, additional service, and enhanced programming available through the trigg&link principle. Basic services are combined into packaged services.
The system principles are outlined to support such services. A scheme is proposed to extend URLs so as to support Web-to-Broadcast linking. The protocol stack to run interactive applications is presented. It is the scheme according to the MHEG and DSM-CC standards, compliant with the DVB and DAVIC specifications.
The trigg&link concept is used in CleverCast®, Philips' DAVIC-compliant end-to-end system for enhanced broadcast services.
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