![]() | (1) |
![]() | (2) |
and where Ht is the residue subband and Mt the motion information.
MCJ2K uses an hierarchical motion estimation algorithm that, alghought is sub-optimal, is fast enought for real-time coding:
Let s the sub-pixel accuracy. After the over-pixel ME stage, the refinement of Mit continues following the next algorithm:
[1] S. Mallat. A Theory for Multiresolution Signal Decomposition. IEEE Trans. on Pattern Analysis and Machine Intelligence, 11:674–693, 1989.
[2] Heiko Schwarz, Detlev Marpe, and Thomas Wiegand. Overview of the scalable video coding extension of the h.264/avc standard. IEEE Transactions on Circuits and Systems for Video Technology, 17(9):1103–1120, September 2007.
[3] A. Secker and D. Taubman. Lifting-based invertible motion adaptive transform (limat) framework for highly scalable video compression. IEEE Transactions on Image Processing, 12(12):1530–1542, December 2003.
[4] W. Sweldens. The Lifting Scheme: A new Philosophy in Biorthogonal Wavelet Constructions. In Proc. SPIE, volume 2569, pages 68–79, September 1995.
[5] W. Sweldens and P. Schröder. Building Your Own Wavelets at Home.