摘要 |
PURPOSE:To improve the compression rate by applying two-dimensional data compression when a data line of same color and uniform level is consecutive on a data line of a uniform level and applying one-dimensional data compression in other cases. CONSTITUTION:A data compression and reproducing section 20 is provided with input buffer sections 23, 24 and a data for one line's share is transferred in the lump via a data bus 22. A uniform level detecting circuit 25 detects whether the line data is a full white line or a fll black line and gives the result to a flag 27 in a controller 26. The system reads the saif flag and applies two-dimensional compression only when the data lines of same color and uniform level are consecutive.
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