An IP DiffServ framework for real-time video transmission
Min Chen, Gang Wei, Xiaosong Zhu · 2003
This paper presents an improved IP differentiated services (DiffServ) framework, which is suitable for real-time video transmission. Especially, we investigate MPEG-4 video transmission. Based on the feature of MPEG-4 flow and the extent of network congestion, implements a new DiffServe marking algorithm. In the border router, we propose a new scheduling algorithm, called the bit-based weight time slot compensate (BWSC) scheduling algorithm, which dynamically adjusts the weighted quantum of service. Under the condition that network bandwidth can't guarantee the demand of MPEG-4 real-time transmission, the PSNR comparison of restored MPEG-4 video frame sequence verifies our method has much better performance that best-effort network. End-to-end delay and delay jitter also meet the real-time transmission demand in the improved DiffServe network.