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v.42bis in Technology
communications, standard
An extension of the ITU-T V.42 standard modem protocol to included compression using a Lempel-Ziv related technique, which detects frequently occurring character strings and replaces them with tokens. This is similar to the Unix compress utility. Typical compression for text is 50% or better; with nearly 20% gain from synchronous conversion this gives reduces transmission time by almost 60%.
[Details? On-line spec?]
The Free On-line Dictionary of Computing, © Denis Howe 2010
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