发明名称 METHOD AND APPARATUS FOR COMPRESSING AND REPRODUCING PICTURE DATA
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.
申请公布号 JPS60251770(A) 申请公布日期 1985.12.12
申请号 JP19840108776 申请日期 1984.05.29
申请人 RICOH KK 发明人 ISOBE HIROMASA
分类号 H04N1/417 主分类号 H04N1/417
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