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在分布式视频编码有损编码理论的基础上,提出了一种基于像素域的分布式视频编码方法。在该方法中,输入的视频帧被分为Key帧和Wyner-Ziv帧两类,其中Key帧使用传统的帧内编码方式进行编码,而Key帧之间的Wyner-Ziv帧使用基于像素域的编码方法。在解码端,通过对相邻的Key帧进行运动补偿插值,得到Wyner-Ziv帧的辅助信息,再结合编码比特流的解码信息获得重构Wyner-Ziv帧。实验结果表明:基于像素域的Wyner-Ziv分布式视频编码算法具有优于H.264全I帧编码的性能。
Based on the theory of distributed video coding lossy coding, a distributed video coding method based on pixel domain is proposed. In this method, the input video frames are divided into two categories: Key frame and Wyner-Ziv frame, wherein the Key frame is encoded by the traditional intra-frame encoding method, and the Wyner-Ziv frame between Key frames is based on a pixel domain Coding method. At the decoding end, the auxiliary information of Wyner-Ziv frame is obtained through motion compensation interpolation of the adjacent Key frame, and the reconstructed Wyner-Ziv frame is obtained by combining the decoded information of the encoded bit stream. Experimental results show that the Wyner-Ziv distributed video coding algorithm based on pixel domain has better performance than H.264 full-frame coding.