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Constructing codes with bounded codeword lengths (Corresp.)

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When the letter probabilitiesp_1,p_2,cdots,p_Nfor a message sourceSare unknown, it may be imprudent to construct a Huffman code forSbased on the relative frequenciesf_1, f_2,cdots, f_Nof the letters in a sample messageM. Rather, a more cautious approach is to select an integerb geq log_2 Nand to construct the codeC_bwhich encodesMmost efficiently subject to the restriction that codewords are at mostbbits long. This correspondence describes an algorithm for calculatingC_binO((b-log_2 N)N^2)steps.

Published in:

Information Theory, IEEE Transactions on  (Volume:20 ,  Issue: 2 )

Date of Publication:

Mar 1974

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