26. The decoding method of claim 17 , wherein a portion of the mapping serving as a coding scheme, wherein the coding scheme maps sequences of encoding symbols to each of the decoding symbols.
27. The decoding method of claim 26 , wherein a segmenting step is further performed before the step of selecting one of the encoding sequence combinations such that at least one segmented sequence is generated for the input sequence according to the coding scheme, and one of the encoding sequence combinations is selected according to the generated segmented sequence.