Masahiro Iwahashi Osamu Nishida Somchart Chokchaitam Noriyoshi Kambayashi Optimum word length allocation for multipliers of integer DCT. 400-403 2003 ISCAS (2) http://dx.doi.org/10.1109/ISCAS.2003.1205992 db/conf/iscas/iscas2003-2.html#IwahashiNCK03