Research on rate control algorithm of encoder side under wireless noise channel
基于无线噪声信道的编码端码率控制算法研究

In distributed video coding system, to solve the problem that key frames would be corrupted by the noise while transmitting via the wireless channel, this paper proposed a rate control algorithm at the encoder side under the wireless noise channel. At the decoding side, it theoretically and experimentally analyzed the noise from the key frames that the side information carried, and then built the distribution model of the noise from the wireless channel. Combined with the traditional correlation model, it deduced the joint-noise model of the encoder side. And according to the rate distortion theory, it proposed the rate control algorithm of different coefficient bands of WZ frames. Finally it integrated the new rate control algorithm into the Wyner-Ziv encoder under the wireless noise channel. The experiment shows that, compare with the present encoder rate control algorithm, the proposed method can increase the average PSNR of reconstructed images by 0. 1 to 1. 8 dB under different noise conditions, without adding the coding complexity.