Improvements in or relating to security systems

专利名称：Improvements in or relating to security

systems

发明人：Nerlikar, Virupax S.,Edenson, Roy I.申请号：EP97107292.1申请日：19970502公开号：EP0809245A2公开日：19971126

专利附图：

摘要：The invention consists of attaching or embedding a \"TIRIS\" transponder (orother RF or IR or barcode or other identifying device) physically into the center of theproposed DVD disk. Within the memory of the transponder, both a predetermined

address and a code word are preprogrammed into the transponder at the manufacturinglevel of the media product. The media player not only comprises functionality to play thedisk, but also comprises the functionality to transmit an interrogation signal to thetransponder, and then to receive the transponder response signal. Therefore, once a diskis input to a media player, the interrogation portion of the media player transmits aninterrogation signal to the transponder located on the disk. Thus once empowered withthe interrogation signal, the transponder accesses the predetermined address and thecode word from it's memory. Then the transponder transmits both the address and thecode word to the interrogator, located within the media player, and the player accessesthe particular address Iocation on the disk. The media player only plays if there is amatch between the read data-word and received code word. The comparison can occurwithin the interrogation portion of the media player or within the media player itself.

申请人：TEXAS INSTRUMENTS INCORPORATED

地址：13500 North Central Expressway Dallas Texas 75265 US

国籍：US

代理机构：Schwepfinger, Karl-Heinz, Dipl.-Ing.

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