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变换域Wyner-ziv视频编码的码率控制

DOI: 10.13190/jbupt.200904.15.wangfq, PP. 15-19

Keywords: 分布式视频编码,Wyner-ziv视频编码,码率控制,相关噪声模型

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Abstract:

为了降低变换域Wyner-Ziv视频编码的解码复杂度,利用信道相关特征量及系数带的时间相关性提出了一种有效的码率控制算法.该算法在编码仨计传送的最小码率块,并利用不同系数带的时间相关性及信道的平均反馈次数,对估计的最小码率进行调整,得到实际需要传送的初始码率,从而有效地控制解码反馈次数,降低系统延时和解码复杂度.实验结果表明,该算法在保证编码效率的同时可以大幅度降低解码复杂度,最大可降低82%.

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