Does the DAI apply to both a receiver and a transmitter terminal ?
DMIF is a symmetric networking architecture. That is to say, any DMIF terminal can assume the role of producer or consumer of information (i.e., support for bi-directional transport channels). DMIF is a departure from the classic server/client paradigm. The role of a DMIF terminal in a session (e.g., video server or video player) is assigned exclusively by the application layer. In other words, the DMIF layer implementation is the same for all peers involved in a session However, in the MPEG-4 case more emphasis and time has been dedicated to the receiver side, for which a uniform DAI has been conceived to accommodate all possible scenarios. The transmitter side, in the MPEG tradition, is out of the scope of the specification. DMIF is somehow an exception to this rule, since support to bi-directional communication scenario was considered essential as well.
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