A Framework to Assist Bit Rate Control for Distributed Multimedia Applications

In this paper, we describe a framework to construct a function used in a multimedia distribution tool with user-driven QoS control. The multimedia stream throughput control is based on this function whose parameters are bit rate, QoS level and quality. Our results show that (1) actual quality measures are needed in order to confirm or deny assumptions about video quality; (2) some QoS application parameters have a much greater influence on quality as a whole than others; (3) quality is not proportional to bit rate; and (4) different quality levels can provide the same bit rate.