A two-layer real-time rate control algorithm based on lagrange optimum algorithm

Because of the iterative process in the rate control algorithm of H.264 draft, it is not suitable for real-time transmission. A two-layer real-time rate control algorithm based on Lagrange optimum algorithm is proposed. This algorithm consists of two layers, namely, the group of pictures (GOP) layer and the frame layer. The simulation results show that the proposed algorithm is competitive in terms of peak signal to noise ratio (PSNR), real bitrates and the Q-value among frames over the original algorithm. Foundation item: Supported by the National High-Technology Research and Development Program of China (863 Program) (2001AA132050-03) and the Key Project of Chinese Ministry of Education (211CERS-10)