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Variable Length Code Word Encoder Decoder

IP.com Disclosure Number: IPCOM000053001D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Jones, I [+details]

Abstract

A variable-length code-word encoder/decoder is described which allows a fixed algorithm, implemented in hardware or software, to generate any desired code length structure using stored coefficient tables. The translation process is divided into two steps to reduce table size. The fixed length Source character is first translated by table look-up to Rank; then translations between Rank and Code can be performed by means of a simple algorithm, which uses a table specifying the number of codes of each length.