Densely packed decimal encoding
Cowlishaw, M.
Computers and Digital Techniques, IEE Proceedings -
Volume 149, Issue 3, May 2002 Page(s):102 - 104
Digital Object Identifier   10.1049/ip-cdt:20020407
Summary:Chen-Ho encoding is a lossless compression of three binary coded decimal digits into 10 bits using an algorithm which can be applied or reversed using only simple Boolean operations. An improvement to the encoding which has the same advantages but is not limited to multiples of three digits is described. The new encoding allows arbitrary-length decimal numbers to be coded efficiently while keeping decimal digit boundaries accessible. This in turn permits efficient decimal arithmetic and makes the best use of available resources such as storage or hardware registers

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