发明名称 |
Process for improving image quality in picture telegraphy |
摘要 |
Apparatus and method for improving the picture quality during transmission of facsimile signals which have an image signal having a signal of a particular polarity but has an minimum amplitude to represent a first information state such as white and a maximum amplitude to represent a second information state such as black whereby due to changes of information of the signal inverter pulses are obtained for the formation of a signal of changed polarity such that the change in polarity represents an information state and the zero position represents the second information state.
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申请公布号 |
US4213155(A) |
申请公布日期 |
1980.07.15 |
申请号 |
US19780902900 |
申请日期 |
1978.05.04 |
申请人 |
HELL, DR-ING RUDOLF GMBH |
发明人 |
MUENCHOW, JUERGEN;SOMMER, RUEDIGER |
分类号 |
H04N1/41;(IPC1-7):H04N1/36 |
主分类号 |
H04N1/41 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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