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快速3D-MSPIHT视频编码算法

DOI: 10.11834/jig.20091042

Keywords: 视频编码,提升小波,3维等级树集分割,多媒体传感器网络

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Abstract:

多媒体传感器节点的处理能力、存储能力和通信能力相对较弱,给视频编码传输带来了极大的挑战。提出了一种改进的3维等级树集分割(3D-MSPIHT)的视频编码方法,将等级树集分割(SPIHT)算法予以改进并推广应用于3维视频编码中,该算法采用提升小波进行3维子带分解,通过改进的根和分割方法实现对系数重排序,保证更多重要的信息更早地编码于比特流中;同时采用无链表的编码结构,不需要进行复杂繁重的运动估计和补偿,实现了较少的内存和能量消耗,能够提供较好服务质量(QoS)。实验结果表明,此方案优于3D-SPIHT算法,低比特率情况下尤为突出;与H.264等编码方案相比,在图像质量基本相同的情况下,编码速度提高了11.5~11.8倍。

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