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为了避免分布式视频编码(DVC)采用独立比特面译码存在的信源间相关性弱化,提出了一种联合比特面译码(JBPD)算法.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,对其他比特平面进行解码,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,在其他环节相同时,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比特率有较大降低,且随着量化级数的增多,性能提升更为明显.
In order to avoid the weakening of the correlation between sources using discrete bit-plane decoding in distributed video coding (DVC), a joint bit-plane decoding (JBPD) algorithm is proposed, which uses the result of quantized coefficients decoded bit-plane Prior information and decoding other bitplanes to avoid the weakening of inter-source dependencies existing in the decoding of independent bit planes and make full use of the correlation between Wyner-Ziv frames and key frames, without increasing the decoding complexity , The rate distortion performance of distributed video coding is improved.The simulation results show that the distributed video coding system using joint bit plane decoding algorithm has a larger bit rate than the system using independent bit plane decoding when the other links are the same Lower, and with the increase of the quantization level, the performance improvement is more obvious.