| 摘要 |
PURPOSE:To compress a character font which is plainly compressed and reducible in data volume. CONSTITUTION:This device is equipped with an M dividing means 4 which divides character font data into four, an encoding means 5 which judges whether or not there is black (1) in the divided data and encodes the data into 4-bit data, a judging means 6 which judges whether or not the data need to further be divided, a compressing means 7 which adds compression and restoration information, a run length table 8 where codes of short code lengths are assigned to 2X2-dot data (run length) that are high in occurrence frequency, and a run length encoding means 9 which encodes the run length according to the run length table 8. |
