【摘要】 为了改善传统可伸缩性视频编码方法效率不高的问题,将提升小波应用于运动补偿时域滤波中。利用5/3提升小波进行时域滤波,针对像素的连接类型不同采取不同的处理方式,并根据运动补偿效果自适应选取时域分解级数。实验结果表明,该算法不仅实现了码率良好的可伸缩性,而且与MPEG-4(Moving Pictures Expert Group-4)和3DWT(3 Dimensions Wavlet Transformation)方法相比,在相同码率的条件下,重建图像的信噪比提高了1～2 dB,从而有效地提高了编码效率。更多还原

【Abstract】 In order to improve the traditional scalable video coding performance,the lifting wavelet is used in MCTF(Motion Compensated Temporal Filtering).The 5/3 lifting wavelet is carried on the temporal filter.Dif- ferent motion-handled modes are adopted to deal with pixels with different connected states,and according to mo- tion compensation effect the progression of temporal domain decomposition is auto-adapted.The experimental re- sults show that the algorithm achieves a rate of scalability,and the PSNR is 1～2 dB better than MPEG-4 (Moving Pictures Expert Group-4)and 3DWT(3 Dimensions Wavlet Transformation)with the same compensa- tion rate,and effectively enhance the code performance.更多还原