DEVICE AND METHOD FOR CONVERTING/DECODING CODE AND RECORDING MEDIUM

摘要

Source data each consisting of m-bits can be converted into conversion codes each consisting of n (>m) bits with ease, and reverse conversion thereof can be performed with ease. Features of the sorts and contents of 15-bit codes as conversion codes of tables A to F are summarized as follows. Table A includes 175 sorts of codes (having an code end expressed as ..00) Table B includes 81 sorts of codes (having an code end expressed as ...0010) Table C includes 81 sorts of codes (having an code end expressed as ...0001) Table D includes 34 sorts of codes (having an code end expressed as ...001001) Table E includes 86 sorts of codes (having an code top expressed as 00... and a code end expressed as ...00) Table F includes 39 sorts of codes (having a code top expressed as 00... and a code end expressed as ...0010) A current input source data and a next input source data are respectively taken in by registers R0 and R1. Whether or not a run length at a connecting portion between consecutive source data satisfies conditions is determined by a control unit, and a table to be used is selected to finally obtain a conversion code. <IMAGE>