Lattice quantisation for image sequences coding at 16 dimension

The performance of a 16-dimensional lattice quantisation scheme is investigated. A simple E_k-type lattice which includes all the necessary shape patterns for reliable image reconstruction in a codebook of manageable size, is devised to replace the most dense Lambda ₁₆. Simulation results demonstrate that E₁₆-based LQ achieves better signal-to-noise ratio performance than Lambda ₁₆, still at only 1:16 of Lambda ₁₆ encoding complexity.