COPY PROTECTION METHOD AND APPARATUS

专利名称：COPY PROTECTION METHOD AND

APPARATUS

发明人：TAN, Baolin申请号：EP0675.9申请日：20060627公开号：EP1908282A2公开日：20080409

摘要：A copy protection method and apparatus is disclosed. Various protectionsignals are added to a video signal in the vicinity of the color burst part of the signal. Theprotection signals are selected to interfere with the frequency down conversion processin the video recorder so that the color burst cannot be recorded properly. The

protection signals are chosen so that when a modified video signal containing the originalvideo signal and the protection signals has been recorded by a video recorder, playbackof the modified video signal exhibits visual artefacts that are not visible before recordingof the modified signal occurred. The protection signals are also used to carry digitalcontrol information for controlling the operation of a digital recorder.

申请人：Dwight Cavendish Systems Limited

地址：The Icon, Lytton Way Stevenage, Herts SG1 1AH GB

国籍：GB

代理机构：Reeve, Nicholas Edward

更多信息请下载全文后查看