V.42bis Data Compression Software

V.42bis Product Description

GAO's V.42bis software for data compression enhances the performance of error correcting modems by making better use of an often over-crowded communications channel. By using a variable length code to represent fixed length characters, the most commonly transmitted characters are compressed and represented by a codeword much smaller than the conventional bit code. GAO V.42bis encodes a string of characters with a fixed length code. The system uses a dictionary, which has a hierarchical tree structure, to store frequently occurring character strings, along with a code to represent these character strings.

Features of V42bis Data Compression Software

For official ITU-T standard on V.42bis, click ITU-T, V.42bis Standard.

For examples of GAO's Modem Software Architecture, click GAO's Modem Software Architecture.

For a complete list of GAO's Modem Software products, please see GAO's Softmodem List.

V.42bis Data Compression SoftwareV.42bis printable pdf version

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