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DCC
1996
IEEE

On the Implementation of Minimum-Redundancy Prefix Codes

14 years 4 months ago
On the Implementation of Minimum-Redundancy Prefix Codes
Abstract--Minimum redundancy coding (also known as Huffman coding) is one of the enduring techniques of data compression. Many efforts have been made to improve the efficiency of minimum redundancy coding, the majority based on the use of improved representations for explicit Huffman trees. In this paper, we examine how minimum redundancy coding can be implemented efficiently by divorcing coding from a code tree, with emphasis on the situation when n is large, perhaps on the order of 106 . We review techniques for devising minimum redundancy codes, and consider in detail how encoding and decoding should be accomplished. In particular, we describe a modified decoding method that allows improved decoding speed, requiring just a few machine operations per output symbol (rather than for each decoded bit), and uses just a few hundred bytes of memory above and beyond the space required to store an enumeration of the source alphabet.
Alistair Moffat, Andrew Turpin
Added 07 Aug 2010
Updated 07 Aug 2010
Type Conference
Year 1996
Where DCC
Authors Alistair Moffat, Andrew Turpin
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