A copy prevention method and apparatus for a digital video system is disclosed including the steps of: (a) adding a header area of a header start code and key field to a reproduced bit stream: (b) decrypting and transmitting the bit stream to which the header area is added: (c) detecting a key field...http://www.google.es/patents/USRE42922?utm_source=gb-gplus-sharePatente USRE42922 - Copy prevention method and apparatus for digital video system
Copy prevention method and apparatus for digital video system
