| 摘要 |
PURPOSE:To realize the decoding of the using line, by using with switching a prescanning line shift register, a mode detecting ROM and a run length generating counter. CONSTITUTION:The present line is decoded by using the image information data S18 of a decoded line as a reference line data. In this case, a prescanning line shift register 208 that shifts the data S18 of a prescanning line by a bit is used along with a mode detecting ROM201 that constitutes the register 208 and uses output signals S10-S17 plus signals S19-S22 which are optionally designated from outside as the input signals plus a counter 204 that generates the run length designated from outside. These component parts are used with switching when necessary to perform the decoding. |
