IP datacast
Under IP Data Cast (IPDC) all communication protocols summarizes the "new" for the transmission of multimedia content are required on broadcast networks. IP Datacast was developed by the DVB project . IPDC is used in DVB-H .
The classic broadcast services (radio, TV, teletext ...) do without general protocols, so that it is very difficult to develop new services for classic broadcast networks. With IPDC, broadcast networks are expanded to include Internet protocols so that new types of services can be based on a general communication interface. In combination with a return channel, for example via cellular networks, it is also possible to introduce interactive radio services that we know today only as a manual combination of television / radio with telephone calls.
IP Datacast was specified to avoid proprietary solutions for such protocols (such as MediaFLO and DMB) and instead to use a common open standard that is used with DVB-H . The specification defines the system architecture, IP-based transmission mechanisms, the Electronic Service Guide (ESG) [ETSI TS 102 471], the joint use of DVB-H and mobile radio in a hybrid network and other aspects. IP Datacast is supported by a large number of companies that are also behind DVB-H.
DVB-H terminals from BenQ-Siemens, LG, Motorola, Nokia, Sagem, Samsung and others that support IP Datacast have already been presented. Details on the status of the commercial launch can be found on the DVB-H page.
An extension DXB is planned for DAB as an alternative to DMB, which IP Datacast takes over from DVB-H. If the video streams from DMB were also encapsulated in IP Datacast , this would be incompatible with today's DMB receivers, where audio and video are encapsulated in MPEG 2 transport streams and then transmitted directly in a DAB subchannel. Functionally, however, there is no technically compelling reason for an additional encapsulation of the files in IP Datacast at this point. Pure IP transmission is already possible in the DAB / DMB system, but is not used to encapsulate file transmissions or video / audio streams.