| 摘要 |
<p>PROBLEM TO BE SOLVED: To enable a high-speed operation nearly without lowering the compressibility. SOLUTION: The encoding device, which has a color order table 23 consisting of a higher two-dimensional color order table 20 constituting two-dimensional peripheral pixel data and a linear color order table 22 for lower color order generated through latest appearance table generating operation for shifting up the color order order of a color symbol corresponding to the latest inputted color pixel data is provided with an escape code generating means 15, which outputs an escape code indicating the total number of color symbols in higher color order and color symbols in lower color order reaches a specific number to the order corresponding to color symbols after specific order in such a case. When both the color tables 20 and 22 have the same color symbol, the symbol is not deleted from the linear color order table 22, but left in the linear color order table 22.</p> |
