一种运动自适应的帧内插算法

骆立俊; 邹采荣; 何振亚; 陆阳

一种运动自适应的帧内插算法

骆立俊^{①;邹采荣},
邹采荣,
何振亚,
陆阳

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- 被引次数: 0
出版历程
- 收稿日期: 1997-01-15
- 修回日期: 1997-09-11
- 刊出日期: 1998-07-19

AN ALGORITHM FOR MOTION ADAPTIVE FRAME INTERPOLATION

Luo Lijun^{①;邹采荣},
Zou Cairong,
He Zhenya,
Lu Yang

摘要

摘要: 本文提出了一种运动自适应的帧内插算法,可以用于逐行扫描的数字视频系统中做帧速率转换。该算法首先采用了线性预测块匹配搜索算法来估计内插帧中每一个象素的运动矢量;然后对得到的运动场进行中值滤波和判别,剔除运动不一致或错误的运动矢量;最后沿着运动轨迹线性内插得到内插帧的象素值。仿真分析表明本文提出的算法,在一个大的搜索区域进行快速搜索和判别,可以有效地解决内插帧中快速运动目标的运动模糊和有切换帧时的图象重叠,提高了帧速率转换中内插帧的主观视觉质量。
- 运动估计; 中值滤波; 数字视频系统
Abstract: A motion adaptive frame interpolation algorithm for progressive frame rate conversion of digital video systems is proposed. Firstly a motion vector is searched for each pixel in the interpolated frame using the block-matching search method of linear prediction. Then the resulting motion field is median filtered and differentiated to remove inconsistent or wrong vectors. Finally averaging along the motion trajectory is used to get the interpolated pixel values. Simulation results indicate the proposed method with fast search and differentiation in a large area can solve the motion blurring of fast moving object and the scene overlapping of a scene change in the interpolated frame, and the corresponding objective quality of the interpolated frame is also improved.

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参考文献(1)

Hentchel C. Linear and nonlinear procedures for flicker reduction. IEEE Trans. on Consumer Electronics, 1992, CE-38(4): 151-156.[2]Csillag Peter, Boroczky Lilla. Motion-compensated frame rate[3]using an accelerated motion model. Proceeding of ICASSP96, Altalanda, USA: 1996, vol. 4, 2319-2322.[4]Schamel G. Pre- and post-filtering of HDTV signals for sampling rate reduction and display[5]up-conversion. IEEE Trans. on CAS, 1987, CAS-34(11): 1432-1439.[6]Castagno Roberto, Haavisto Petri, Giovanni Ramponi. A method for motion adaptive frame rate up-conversion. IEEE Trans. on CAS VT, 1996, 6(5): 436-446.[7]ISO/IEC 13818-2 Coding of moving picture and associated audio, 1995.[8]Koga T, linuma K, et al. Motion-compensated inter-frame coding for video conferencing. in Proc. NTC81, New Orleans, LA: Nov. 1981, C9.6.1-C9.6.5.[9]Kappagantula S, Rao K R. Motion compensated inter-frame image prediction. IEEE Trans. on Commun., 1985, COM-33(9): 1011-1015.[10]Jain J R, Jain A K. Displacement measurement and its application in inter-frame image coding. IEEE Trans. on Commun., 1981, COM-29: 1799-1808.[11]Ghanbari M. The cross-search algorithm for motion estimation[J].IEEE Trans. on Commun.1990, 38(7):950-953[12]Lee L W, Wang J F, Lee J Y, and Shie J D. Dynamic search-window adjustment and interlaced search for block-matching algorithm. IEEE Trans. on CAS VT, 1993, 3(2): 85-87.[13]Li R, Zeng B, Liou M. A new three-step search algorithm for block motion estimation. IEEE Trans. on CAS VT, 1994, 4(4): 438-442.[14]Po L M, Ma W C,. A novel four-step algorithm for fast block motion estimation. IEEE Trans. on CAS VT, 1996, 6(3): 67-71.

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