QoS Control Measure of Application Layer on Realtime Video Streaming of Internet
Cheng Liu · Modern Electronic Technique · 2005
The paper describes the characteristics of transporting realtime video.Studies the QoS control measure of application layer, which are congestion control and error control. Congestion control includes: rate control and rate distortion. Rate control is that useable band width is predicted according to running state of the network, video rate is adjusted and they are matched as predicted rate. Rate distortion is impelled to send video stream according to rate control algorithms. In error control, the strategy of encoder error resilience,decoder error concealment and encoder/decoder interactive error control have been discussed. Applying these controlling technology, the QoS supportting of router and network does not required.