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93. 发明专利

JPS61502442A 失效
公开(公告)号：JPS61502442A
公开(公告)日：1986-10-23
申请号：JP50284585
申请日：1985-06-10
申请人： RCA CORP
发明人： MCDONALD JAMES ALEXANDER , WAYBRIGHT GEORGE CLEVELAND , WILLIS DONALD HENRY , SUTHERLAND II HUGH FERRAR , LUZ DAVID WARREN , HAFERL PETER EDUARD
IPC分类号： H04N3/23 , H01J29/56 , H04N3/233

97. 发明专利

JPS61224609A RECURRENT TYPE FILTER SYSTEM 失效
公开(公告)号：JPS61224609A
公开(公告)日：1986-10-06
申请号：JP6703286
申请日：1986-03-24
申请人： RCA CORP
发明人： DONARUDO HENRI UIRISU
IPC分类号： H03H17/00 , H03H17/04 , H04N5/14 , H04N5/21 , H04N9/64 , H04N9/77 , H04N9/78

99. 发明专利

JPS61212172A METHOD AND APPARATUS FOR OVERLAPPING VIDEO IMAGE 失效
公开(公告)号：JPS61212172A
公开(公告)日：1986-09-20
申请号：JP4389186
申请日：1986-02-27
申请人： RCA CORP
发明人： BURAIAN ASUTORU , JIERARUDO DEIBITSUDO RIPUREI
IPC分类号： H04N5/278 , G09G5/00 , H04N5/272
摘要： Computer generated or other video objects 18 may be superimposed over a background video image 14 so as to create the illusion of a single composite scene. The leading edge of an object is detected by one-shot 22 and for a period of time set by one-shot 22 the object 18 and background video 14 signals are mixed. After that period, only the object video 18 is transmitted. Upon detection of the object's trailing edge by one-shot 28, the two video signals are again mixed for a period of time set by one-shot 28. After this latter period, only the background video signal 14 is transmitted until another object's edge is detected. The mixing of the signals at the edges of the object produces a blending of the object into the background scene so that the object appears to be more realistically part of a single scene. The area of the foreground video signal around the object is maintained at a "blacker-than-black" level to ensure that object detail is not mistaken for an edge. Inverter 26 is provided since the one-shots trigger only on positive-going transitions. The delays 12, 20 are about half of one pixel period.

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