摘要
为了进一步提高编码的效率,提出了一种基于离散余弦变换(discrete cosine transform,简称DCT)的能量函数的快速Intra-4×4模式选择算法.该算法通过估计帧内预测残差的纹理复杂度达到减少进行率失真最优化计算的模式数量.实验结果表明,该算法在保持原有编码效率的基础上能节省约一半的编码时间.
In achieve a high compression ratio,the authors proposed order to a DCT-based energy function,which is used to estimate the textural complexity of residual blocks of intra prediction.Then no more than 4 modes instead of 9 intra prediction modes for 4×4 block can be chosen to perform RDO according to the textural complexity of residual block.Consequently,the complexity decreases significantly.Experiments show that the proposed algorithm can save about 48% of the computation time stably while maintaining the ...
出处
《北京工业大学学报》
EI
CAS
CSCD
北大核心
2009年第10期1423-1427,共5页
Journal of Beijing University of Technology
基金
国家自然科学基金资助项目(60572104)
国家高技术研究发展计划资助项目(2006AA01Z317)
北京市教委科技发展计划资助项目(KM200710005017)