Resource allocation and synchronization protocols for quality-based presentation in distributed multimedia systems
Abstract
Distributed multimedia systems are expected to be a crucial component of technology based information infrastructures. In this dissertation we present a framework for the design and development of a distributed broadband multimedia system that allows groups of users to simultaneously store, distribute, access and share complex multimedia documents. Our primary objective is to design a broadband multicast environment that supports multimedia applications with guaranteed quality of service (QoS) under diverse network conditions and resource constraints. We propose a distributed multi-layered architecture to serve as the basis for developing the proposed system. In particular, we focus on synchronized presentation of multimedia data at the client site. Towards this end we propose two synchronization protocols: (i) a resource controlled protocol; and (ii) an end-to-end synchronization protocol. In the resource controlled approach, network resources are allocated to attempt the transport of multimedia streams to be consistent with the play-out process at the client. For congestion control our design provides graceful quality degradation. In our work we focus on the reliability quality parameter. In case the network does not provide active resource control, end-to-end transport-level protocols at client/server are necessary to achieve synchronization as well as to maintain the disparate quality requirements. The overall mechanism is to design transmission scheduling policies for concurrent media streams in order to ensure both inter-stream and intra-stream synchronization requirements of media streams. We propose several heuristic algorithms for generating the transmission schedule and present their impact on the presentation quality of the multimedia data.
Degree
Ph.D.
Advisors
Ghafoor, Purdue University.
Subject Area
Electrical engineering|Computer science|Operations research
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