Distributed Multimedia Plays with QoS guaranties over IP,” Wedelmusic

Musical collaboration over telecommunication networks has marvellous possibilities when it comes to musical education, practise and performance. The use of high-capacity digital networks brings the latency of transmission far below the maximum perceived audio and video latency of 5−20 milliseconds, which is similar to the audio time delay experienced between musicians on a stage. The main challenge of using digital packet switched network such as the Internet, is to control the queuing delay of each IP packet experienced at each router on the network paths between each participating musician. Other important aspects are video and audio codec latency, and error resilient tools needed to cope with situations where IP packets arrive too late or have been lost in the network. This paper gives an overview of resent research (work-in-progress) in this field, including network simulations, conducted at the Norwegian University of Science and Technology, and suggests how these techniques can be utilized under live concert performances. 1