使用联合比特面译码的分布式视频编码

提出了一种联合比特面译码（JBPD）算法用于分布式视频编码。该方法利用量化系数已解码比特平面的结果作为先验信息，对其它比特平面进行解码，避免了独立比特面解码时存在的信源间相关性弱化，更充分利用了Wyner-Ziv帧与关键帧之间的相关性，可在不增加解码复杂度的情况下提升分布式视频编码的率失真性能。仿真结果表明，在其它环节相同时采用联合比特面译码算法的分布式视频编码系统比采用独立比特面译码的系统最多可节省比特率16.5%，并且随着量化级数的增多，性能提升更为明显。

A Distributed Video Coding Method Using Joint Bit-Planes Decoding Algorithm

A joint bit-planes decoding (JBPD) algorithm for distributed video coding is proposed. The JBPD algorithm uses the decoded bit-plane results of quantization coefficients as prior knowledge, and decodes the other bit-planes to avoid correlation weakening between sources when decoding bit-planes independently. It makes full use of correlation between Wyner-Ziv frames and key frames; therefore the rate-distortion performance of distributed video coding can be enhanced without increasing decoding complexity. Simulations indicate that, compared with the independent bit-planes decoding system, the proposed algorithm can achieve up to 16.5% bit-rate saving under the same condition, and performance improves more apparently with the increase of quantization levels.