| 摘要 |
FIELD: information technologies. ^ SUBSTANCE: method of data compression is realised with the help of coder. The first unit of coder memory stores preliminarily recorded code combinations (CC1) with number of digits n, where n = 2, 3, 4Ç, representing a complete set of possible inlet code combinations (CC). The second unit of coder memory stores preliminarily recorded code combinations CC2, which definitely comply with CC1 with number of digits that is less or equal to the number of CC1. Input flow of data is separated into CC with identical number of digits n. CC is serially entered into coder, identified, by means of comparison to CC1, presented by according output code combination CC2. CC2 present a sequence of groups with identical number of digits n in each one. Combined number of code combinations CC2 is mn, where m = 2, 3, 4Ç, n = 1, 2, 3Ç. Number of subsequent groups CC2 is identified as mn-1, mn-2Ç. Number of digits of CC2 in group is leveled by addition of a nonsignificant zero prior to code combination. ^ EFFECT: simplicity of realisation, improved speed of coding, reduction of time for data transfer along channel of communication, compression of transmitted signals spectrum width, improved noise immunity of transmission, provision of transmitted or stored information security. ^ 2 cl, 1 dwg, 5 tbl, 5 ex |
