Estimating Video Popularity From Past Request Arrival Times in a VoD System

System-Level Issues for a Multi-Rate Video VOD System

This document describes system-level issues for incorporation of multi-rate video into a videoon-demand system. The issues are broadly separated into two classes: rate negotiation, involving selection of a rate at which the requested video will be provided, and rate delivery, involving delivery of the coded stream to the user. Requirements of the server, the network, and the set-top box are dev...

Video Management in Commercial Distributed Video on Demand (VoD) Systems

Arrival times in Quantum Theory from an Irreversible Detector Model

We investigate a detector scheme designed to measure the arrival of a particle at x = 0 during a finite time interval. The detector consists of a two state system which undergoes a transition from one state to the other when the particle crosses x = 0, and possesses the realistic feature that it is effectively irreversible as a result of being coupled to a large environment. The probabilities f...

2 . Accessing a Vod System

protect videos and either restrict access or pay royalties, we will not be able to digitize and put material on-line. We believe the best approach to this problem is to encrypt the videos and provide access keys that allow a user to decrypt the video when it is played. The system can manage this mechanism, but it does require hardware support for decryp-tion which most vendors of PC boards for ...

Estimating Decoding Times of MPEG-2 Video Streams

This paper is motivated through the advantages offered by employing real-time (priority-driven) scheduling (RTS) for efficiently implementing quality-of-service guarantees. For employing RTS (e.g. for conferencing), a-priori knowledge about worst-case execution times (WCET) of the decoding process is required. With our new approach (focussing of MPEG 2 with variable bitrates) the resource usage...