Title :
Covariance analysis of non-translational motion-compensated frame differences
Author :
Veeravalli, Anant G. ; Pan, W.D. ; Nalasani, Mahesh ; Mohan, Manoj Kumar Santha
Author_Institution :
Dept. of Electr. & Comput. Eng., Alabama Univ., Huntsville, AL, USA
Abstract :
Motion estimation is an important technique used in the compression coding of video data where significant temporal redundancy exists between neighboring video frames. Through motion estimation we can provide a motion-compensated prediction of the frame that is to be coded based on the previously coded frames. Coding the difference between the current frame and its motion-compensated prediction frame can be made more efficient if more accurate motion estimation can be achieved. Our previous work has shown that non-translation motion estimation based on Lie operators can increase the motion estimation accuracy by taking into account non-translation transformations of objects such as scaling and rotations across frames. As an extension of our previous work, we conduct covariance analysis on motion-compensated frame difference signals generated by (i) using conventional motion estimation methods that consider only translational motions, and (ii) applying additional non-translational motion estimation based on Lie operators. Experimental results on two standard test sequences show that our non-translational motion estimation method can further de-correlate the frame difference signals obtained by the conventional translational motion estimation methods.
Keywords :
covariance analysis; data compression; motion compensation; video coding; Lie operators; compression coding; covariance analysis; motion estimation; nontranslational motion-compensated frame differences; Equations; Motion analysis; Motion estimation; PSNR; Predictive models; Redundancy; Signal analysis; Signal generators; Signal processing; Video compression;
Conference_Titel :
System Theory, 2005. SSST '05. Proceedings of the Thirty-Seventh Southeastern Symposium on
Print_ISBN :
0-7803-8808-9
DOI :
10.1109/SSST.2005.1460958