发明名称 Method and apparatus for superimposing additional information signal to video signal
摘要 <p>On the occasion of superimposing a spectrum spread additional information signal obtained by spectrum spreading the additional information such as a duplication preventing control information and a copy right information, etc. to a video signal, the edge portion of an image of the video signal is detected to set the level of a part of the spectrum spread additional information signal higher than the other part in the part corresponding to the edge portion for the purpose of superimposing such additional signal to the video signal. Thereby, the additional information signal can easily be detected, without deteriorating the reproduced image.</p>
申请公布号 SG68674(A1) 申请公布日期 1999.11.16
申请号 SG19980002832 申请日期 1998.07.31
申请人 SONY CORPORATION 发明人 IKEDA NOZOMU;OGINA AKIRA
分类号 H04N5/765;G06F21/10;G06T7/60;H04N1/387;H04N5/208;H04N5/781;H04N5/91;H04N5/913;H04N7/08;H04N7/081;H04N19/00;(IPC1-7):H04N5/913 主分类号 H04N5/765
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