摘要
提出了一种基于混合域牛顿插值的错误掩盖方法,分别在时域和空域进行插值获得两个运动矢量．通过建立插值系数表构造混合的插值模型,获得双域插值的运动矢量．通过最优运动矢量判断得到最后的错误隐藏运动矢量,实验证明,由于充分利用了时域和频域的信息冗余,在10％网络丢包率的环境下平均峰值信噪比比空域拉格朗日插值方法商0．3～0．8dB．
An error concealment algorithm for H. 264 using Newton interpolation in the taybrid field is presented. Two motion vectors are obtained by interpolation in the spatial field and in the temporal field. A hybrid interpolation model is constructed to get the optimal motion vector of the lost motion vector by setting up a table for interpolation coefficients and judging with boundary match algorithm. Simulation results show that this scheme can highly improve the quality of reconstructed video and obtain a gain of about 0. 3 ～ 0.8dB in PSNR, compared with Lagrange interpolation in the spatial field under the condition of Packet Loss Rate with 10%.
出处
《西安电子科技大学学报》
EI
CAS
CSCD
北大核心
2006年第5期687-690,708,共5页
Journal of Xidian University
基金
国家自然科学基金资助项目(60532060
60372043)
国家部委重点实验室基金(51434050105DZ01)
关键词
拉格朗日插值
牛顿插值
混合域插值
运动矢量
Lagrange interpolation
Newton interpolation
interpolation in two fields
motion vector
