无反馈分布式视频编码中的速率控制算法

针对现有比特平面级编码端速率控制算法估计精度要求高的问题，提出了一种帧级编码端速率控制算法。该算法通过在编码端利用分层快速运动补偿内插产生高质量的边信息估计，并根据循环移位去除比特平面间的级别性，使每个比特平面的编码速率均匀化，从而实现帧级别的速率控制。实验结果表明，与现有算法相比，所提算法对中高速运动视频边信息估计质量有明显提升，且解码视频的平均PSNR(peak signal-to-noise ratio)均有提高。

Rate control algorithm for no-feedback distributed video coding

In order to address the high requirement of accuracy on rate estimation in the existed bit-plane-level encoder rate control (ERC) methods, a frame-level ERC algorithm was proposed. It used hierarchical fast motion compensated interpolation to obtain high quality side information estimation at the encoder, and removed the difference between bit-planes with cyclic shift to make the coding rates on each bit-plane homogeneous, therefore achieving a frame-level rate control. The simulation results show that compared with the existed methods, the proposed algorithm can improve the quality of side information estimation considerably especially for the middle-high motion video sequences and increase the average PSNR (peak signal-to-noise ratio) of decoded video.