The Optimal Lattice Quantizer in Three Dimensions* E. S. Barnes Department of Pure Mathematics The University of Adelaide Adelaide, S.A. 5001, Australia N. J. A. Sloane** AT&T Labs - Research Murray Hill, New Jersey 07974, USA * A slightly different version of this paper appeared in SIAM J. Algebraic Discrete Methods}, 4 (No. 1, March 1983), 30--41. ** Current address: AT\&T Shannon Labs, 180 Park Avenue, Florham Park, NJ 07932--0971 ABSTRACT The body-centered cubic lattice is shown to have the smallest mean squared error of any lattice quantizer in three dimensions, assuming that the input to the quantizer has a uniform distribution. For the full version, see: http://www.research.att.com/~njas/doc/optimal.pdf or http://www.research.att.com/~njas/doc/optimal.ps