| http://www.w3.org/ns/prov#value | - A coder for encoding digital information at an average code rate of (n+d/2m) user bits per codeword, wherein n is a positive integer, and d is a positive integer less than 2m, the apparatus comprising:a memory comprising a plurality of non-intersecting subconstellations of dc-free codewords, wherein each codeword is assigned to one of the subconstellations, wherein the subconstellations are of dif
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