| 摘要 |
PURPOSE:To facilitate restoring of two dimensional encoding and to minimize the peripheral circuit by retaining the information of reference line as an inter- mediate data composed of simple color information and bit length information and by administering correspondence of a position on a reference line and a present position on an encoding line by the address of intermediate buffer and the displacement inside the address. CONSTITUTION:When it is one dimensional code (MH), a microprocessor 5 transfers it to a run-length convertion 3. In case of two dimensional code (MR), it is developed to black and white color information and bit length information for each mode. A pair of data composed of one color information of intermediate data and a bit length information uses the memory capacity of teo bytes. Uppermost bit of upper byte out of the two tytes is the color information C, denoting black when it is logical 1, and white when it is logical 0. When the decoding starts from the left edge of the scanning line, the position on the reference line corresponding with starting point picture element a0 is administered by an address A0 of intermediate bufffer and the displacement d0 inside the intermediate data. Namely, the present position on the reference line is administered by coordinates (A0, d0).
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