Network Adaptable Transmission Strategy Applied to H.264

A real-time transmission strategy that adapts network conditions rapidly is brought forward, and it is applied to H.264 encoding standard. Firstly, the strategy forecasts initial network bandwidth using bi-search algorithm, and establishes a dropout rate-smoothing model. In addition, it adopts the AIMD algorithm to adjust the sending bit rates, and then calculates QP based on R-D model. Finally, it encodes the video sequences according to the QP that goes through the operation of smoothness. The result of experiment in model JM shows that, this method reduces the image dithering caused by the change of bit rate, makes better use of network, and improves the video quality.