This document is a discussion of the various ways in which Unicode text can be compressed for storage and interchange. Several different approaches are examined and evaluated, including the Unicode "compression formats," SCSU and BOCU-1; general-purpose compression algorithms such as RLE, Huffman, and LZW; the use of multiple techniques to improve compression; and the effects of normalization on compression. A detailed description of a professional-grade SCSU encoding algorithm is included.
This document is a Unicode Technical Note. It is supplied purely for informational purposes and publication does not imply any endorsement by the Unicode Consortium. For general information on Unicode Technical Notes, see http://www.unicode.org/notes/.
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