摘要
提出了一种基于三维SPECK(SetPartitionedEmbeddedBlock)编码方法的视频编码器。为了进行三维小波变换,视频序列被组织成帧组(GOP, GroupofFrames), 变换后的小波系数被组织成小波方格(WC, WaveletCube)。通过采用3D SPECK对WC进行有效地编码,从而实现视频序列的有效编码。时域上放弃了运动估计和运动补偿,采用了时间轴上的小波变换,因此该编码器与传统的混合编码模式相比,具有计算量小的优点。实验结果表明,该编码器无论在数值结论还是主观效果上都与无运动补偿的3D SPIHT(SetPartitioninginHierarchicalTrees)相当。
A video coder without motion compensation based on 3D-SPECK was proposed. In order to carry out the three dimensional wavelet transform, the video sequences were partitioned into groups of frames (GOP), and the wavelet coefficients were organized as many wavelet cubes (WCs). The WCs were coded by the 3D-SPECK efficiently. The wavelet transform was carried out in the temporal axis instead of the traditional motion estimation/compensation, thus much computation was saved compared with the traditional hybrid coding model. Experiment results show that the proposed coding model achieves both measurable and subjective performances comparable with 3D-SPIHT.
出处
《计算机应用》
CSCD
北大核心
2005年第5期1122-1123,1127,共3页
journal of Computer Applications
基金
天津市自然科学基金(023601111)
