摘要
针对极低比特率应用提出一种新的结合H．263与SLCCA的混合小波视频编码算法.在提出的算法中,首先,用基于H．263的微调运动估计减少时间冗余,用无遗漏覆盖块运动补偿保证运动补偿误差帧的连续性；第二,对运动补偿误差帧进行小波变换得到全局能量压缩；第三,用SLCCA组织和表示小波变换后的数据；最后,运动向量的水平和垂直分量分别用自适应算法编码.算法在A级测试序列Akiyo和B级测试序列Foreman(QCIF)上测试取得了良好效果.
In this paper, a new hybrid wavelet video coding algorithm combined with H．263 and SLCCA for very low bit rate videophone application has been proposed． In the proposed algorithm, first, fine-tuned motion estimation of H．263 has been used to reduce temporal redundancy, and exhaustive overlapped block motion compensation has been used to ensure the coherency in motion compensation error frames． Second, wavelet transform is applied in the motion compensation error frames to achieve global energy compaction． Third, the wavelet coefficients are organized and represented by SLCCA． Last, the horizontal and vertical components of motion vectors are encoded by adaptive arithmetic coding． The proposed algorithm has been tested on both Class-A sequences Akiyo and Class-B sequences Foreman (QCIF) and achieved satisfied performance．
出处
《电视技术》
北大核心
2001年第3期78-81,共4页
Video Engineering
