A Continuous Media Application supporting Dynamic QOS Control on Real-Time Mach

A QOS control is one of the most important factors in continuous media applications. The QOS levels of the applications should be maintained even if several continuous media applications are running concurrently. Also, the QOS levels should be changed according to a number of applications and their respective importances when a system is overloaded. This paper presents our experience with a video-ondemand system that supports a dynamic QOS control scheme on Real-Time Mach, and shows the necessity of a real-time resource management for building such applications. 1 Introduction Multimedia computing has emerged in the last few years as a major area of computer science. This work is motivated by a wide range of potential applications made feasible by integrating continuous media such as audio and video in current computing environment. Now, many modern workstations are equipped with microphones and speakers, and varieties of software packages are available in areas such as music composi..