When transmitting over the error-prone channels

the compressed video bit-steams are always vulnerable to all kinds of transmission errors. The corrupted parts of the bit-streams may not only affect the reconstruction effect of the current frames

but also cause the error propagation problems both spatially and temporally. So it is really practical to take into account the error-resilience effects in each step of the transmission system. In this paper

we describe a framework for video transmission over the packet-loss channel which features the coordinated operation of the H. 264 error resilience encoding

error concealment algorithms

transport-layer packetization and congestion control mechanisms. We analyze and design the key algorithms of the framework and the experimental results show that our approach works well in different channel conditions.