Multimedia Conferencing via Multicast: Determining the Quality of Service Required by the End User
Ash Watson, Martina Angela Sasse · 1997
: Network congestion affects all users, but real-time multimedia communication is particularly vulnerable. It has been proposed that bandwidth reservation should be used to guarantee a certain quality of service (QoS) for such applications. In order to employ bandwidth reservation effectively, we need to know how much bandwidth a particular application requires. This depends largely on the quality at which different media have to be delivered. Since end-users' perception of quality will determine whether applications are successful, it is essential to establish minimum and maximum media quality required by a particular user group for a particular task. This paper discusses suitable methods and measurements to determine perceived media quality. The design of, and results from, an audio quality experiment illustrate the complexity involved. 1. INTRODUCTION The Internet community has grown considerably over the past few years, and there is a danger that it could become a victim of its o...