Abstract
This paper describes the architecture and implementation of a scalable video server for interactive television services, which has been used in several video-on-demand projects in Japan. This server supports a large number of users with the delivery of high-quality video and provides many types of interactive multimedia applications. The server, using the IBM RISC System/6000® and RISC System/6000 Scalable POWERparallel Systems®, permits full interactive operation with clients. It also can deliver a large number of streams when it is expanded from a single-processor system to a multi-processor system, without any change of the server architecture. In this paper, we describe the end-to-end architecture, the design considerations regarding scalability of the delivery scheme for MPEG-2 transport streams, and the management mechanism for interactive applications. This paper also addresses the implementation of quality of service for digital services through a hybrid fiber-coax network infrastructure, and protocols for interactive television services.
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