| 发明名称 |
METHOD AND APPARATUS FOR PREVENTING UNAUTHORIZED COPYING OF SCREEN IMAGES |
| 摘要 |
<p>A method and apparatus for introducing alterations in video scre en images includes projecting recordable but not viewer visible, colored bars, stripes or the like into the video screen images using randomly selected scanning sequences and/or scanning rates, each of which are selected when a known event, such as a known period of time or change in the content of the video screen images, occur.</p> |
| 申请公布号 |
WO03056842(A1) |
申请公布日期 |
2003.07.10 |
| 申请号 |
WO2002IB05704 |
申请日期 |
2002.12.23 |
| 申请人 |
KONINKLIJKE PHILIPS ELECTRONICS N.V. |
发明人 |
EPSTEIN, MICHAEL, A.;JANSSEN, PETER, J., M.;STANTON, DOUGLAS, A. |
| 分类号 |
G03B21/00;G03B21/14;G09G3/20;G09G3/34;H04N5/913;H04N9/31;(IPC1-7):H04N9/31 |
主分类号 |
G03B21/00 |
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