发明名称 ANALOGUE-DIGITAL CONCERSION METHOD AND A PICTURE REPRODUCTION METHOD USING THE SAME
摘要 A method of analog-digital conversion is disclosed, wherein sub-sampling of an analog signal is performed at a certain multiple n of the basic sampling rate, wherein a discrimination signal including extreme position signals is obtained by detecting the level difference between the analog signal and an unsharp signal, and wherein from n consecutively-produced values representative of the analog signal the digital signal to be output is obtained as being; if the extreme position signal is detected, then the consecutively-produced representative value corresponding thereto; otherwise, the average of the n consecutively-produced representative values.
申请公布号 GB2022966(B) 申请公布日期 1982.04.28
申请号 GB19790018147 申请日期 1979.05.24
申请人 DAINIPPON SCREEN SEIZO KK 发明人
分类号 G03F1/00;G03F3/08;H03K7/02;H04N1/40;H04N1/41;H04N5/14;(IPC1-7):H04B1/66 主分类号 G03F1/00
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