A method is used that substantially simultaneously trellis encodes data to be modulated onto multiple tones. The embodiments of the present invention comprise the steps of: (a) using a first input operand comprising state bits for a first trellis stage; (b) using a second input operand comprising a plurality...http://www.google.com/patents/US20080137771?utm_source=gb-gplus-sharePatent US20080137771 - DSL trellis encoding
