A SYSTEM FOR VARIABLE-LENGTH-CODING AND VARIABLE-LENGTH-DECODING DIGITAL DATA

摘要

A system for coding and decoding digital data divided into segments codes the segment data into symbols according to various scanning patterns, accumulates the various lengths of variable-length-coded data (ACCM 1 -ACCM N ), selects a scanning pattern corresponding to a minimum accumulated length (52), transmits or stores the coded data according to the selected scanning pattern, and scans the transmitted or retrieved data according to the same scanning pattern as applied to the coding process, thereby decoding the scanned data. As a result, the efficiency of data compression can be improved by means of utilising an optimised scanning pattern for coding and decoding the segment data.