12. The method of claim 1, wherein encoding at least a portion of the remaining symbols in the message comprises: determining an efficiency parameter for the encoding of a portion of the remaining symbols; and encoding that portion only if the efficiency parameter exceeds a predetermined threshold.
12. The method of claim 1, wherein encoding at least a portion of the remaining symbols in the message comprises: determining an efficiency parameter for the encoding of a portion of the remaining symbols; and encoding that portion only if the efficiency parameter exceeds a predetermined threshold. 13. The method of claim 12, wherein non-encoded symbols are represented in ASCII format when the efficiency parameter does not exceed the pre-determined threshold.