A practical rate control algorithm for VBR MPEG-2 video transmission over ATM networks

In this paper, joint encoder and channel rate control system for real-time VER video transmission over ATM networks is proposed. The proposed system c onsists of channel rate control and encoder rate control. The channel rate over unit GOP is allocated from the proposed 3-state Marcov chain model, in which the states are transient according to video traffics. Given the chan nel rate, encoder rate control is performed by solving minimum distortion e quation using Lagrange multiplier. Experimental results show that our metho d maintains consistent quality, as compared with the conventional real-time implementations, especially when there exist scene changes in the image se quences.