Title: Device and method for protecting copy
Application Number: 200610170088 Application Date: 2006.12.18
Publication Number: 1984313 Publication Date: 2007.06.20
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H04N7/167;H04N7/16;H04H1/00
Applicant(s) Name: LG Electronics Inc. Address:
Inventor(s) Name: Kim In Moon
Attorney & Agent: huangxiao lin wangzhi sen
Abstract:
    Apparatuses and methods of the invention may include creating at least one of a scramble key and a descramble key using a Copy Protection (CP) key that existed prior to a refresh period and using a value created at a time associated with the changing of a channel during the refresh period, and using the at least one of the scramble key and the descrambled key until the CP key is refreshed at an end of the refresh period.
Time: 15