Title :
Smooth motion vector resampling for standard compatible video post-processing
Author :
Dane, Gökçe ; Nguyen, Truong Q.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA
Abstract :
This paper presents a smooth motion vector resampling method that operates on a given motion vector field for video coding applications such as resolution change in transcoding or concealment of lost motion vectors. We formulate the motion resampling problem as an optimization problem, where the proposed algorithm obtains the optimal solution by minimizing a smoothness criteria imposed between adjacent motion vectors. The problem is formulated in the most general case, which enables us to explain some other resampling methods such as motion vector averaging, or linear interpolation as special cases. The simulation results show that the proposed algorithm can efficiently improve the visual quality of the video.
Keywords :
image motion analysis; image resolution; image sampling; optimisation; smoothing methods; video coding; linear interpolation; motion resampling problem; motion vector averaging; motion vector field; optimization problem; smooth motion vector resampling; standard compatible video post-processing; video coding applications; visual quality; Application software; Communication standards; Interpolation; Motion estimation; Redundancy; Transcoding; Vectors; Video coding; Video compression; Video sequences;
Conference_Titel :
Signals, Systems and Computers, 2004. Conference Record of the Thirty-Eighth Asilomar Conference on
Print_ISBN :
0-7803-8622-1
DOI :
10.1109/ACSSC.2004.1399456