The paper describing TGFF is subject to the following copyright provisions: Copyright 1998 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works, must be obtained from the IEEE. Note: Due to the quick publication cycle of CODES/CASHE and a minor change in the TGFF options and code, the figures in this downloadable version are somewhat different than the published work.

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