17. The system of claim 11 , wherein: updating the lookback table comprises storing a table index for the input word in the lookback table, the table index representing a position of the input word in the input stream; and generating an output stream comprises generating a non-matching word portion in association with each codeword generated for an input word of the second data type and generating an output index in association with each codeword generated for an input word of the second data type, the output index representing a position of a partially matching input word in the input stream.
17. The system of claim 11 , wherein: updating the lookback table comprises storing a table index for the input word in the lookback table, the table index representing a position of the input word in the input stream; and generating an output stream comprises generating a non-matching word portion in association with each codeword generated for an input word of the second data type and generating an output index in association with each codeword generated for an input word of the second data type, the output index representing a position of a partially matching input word in the input stream. 18. The system of claim 17 , wherein the output index is represented in the compressed output by a number of bits determined in response to a base-2 logarithm of a position of the input word in the input stream.