发明名称 |
Character and other graphical generating systems for video display. |
摘要 |
<p>A character generating system is disclosed having a source of batches of video keying signals representing different characters combined with further keying signals representing a background for the respective character. The video keying signals are confined to one value range and said further keying signals are confined to a different value range. The system effects spatial transformation of the combined signals and responds to the values of the spatially transformed combined signals to derive shape signals corresponding to the further keying signals and to derive shade signals corresponding to the video keying signals. In response to the shape and shade signals different video signals are provided respectively representing the character and the background both spatially transformed as the combined signals were spatially transformed.</p> |
申请公布号 |
EP0285271(A2) |
申请公布日期 |
1988.10.05 |
申请号 |
EP19880301991 |
申请日期 |
1988.03.08 |
申请人 |
QUANTEL LIMITED |
发明人 |
KELLAR, PAUL RODERICK NOEL;SEARBY, ANTHONY DAVID;STONE, DAVID ROWLAND |
分类号 |
H04N5/275;G09G1/00;G09G1/16;G09G5/02;G09G5/06;G09G5/10;G09G5/22;G09G5/24;G09G5/28;H04N5/278 |
主分类号 |
H04N5/275 |
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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