Sv. Raghavan et al., SYNCHRONIZATION REPRESENTATION AND TRAFFIC SOURCE MODELING IN ORCHESTRATED PRESENTATION, IEEE journal on selected areas in communications, 14(1), 1996, pp. 104-113
Multimedia applications comprise several media streams, which are sema
ntically synchronized at different time instants, The application beha
vior is stored along with the multimedia database using representation
mechanisms such as OCPN (object composition Petri nets) or dynamic ti
med Petri nets (DTPN). It is imperative that one translates the applic
ation behavior to the corresponding schedulable entities, such as pack
ets, so that the performance engineering of any system can be done, us
ing the traffic model arising out of the (media related) application b
ehavior as opposed to individual media level behavior, This requires t
hat a function be defined, which takes the stored temporal representat
ion as input and produces packets as output, preserving the semantic r
elationships among the streams. We propose a methodology based on prob
abilistic, attributed context free grammar (PACFG) to address this iss
ue, We demonstrate the appropriateness of this methodology by applying
it to the OCPN/DTPN representation of a typical multimedia applicatio
n vis-a-vis orchestrated presentation.