Patent ID: 9532006
Filing Date: 2016-12-27
CPC Classification: G06T,H04N

Claim Text:
1. A headend system comprising: a duplicator configured to generate two or more copies of at least a part of a first digital signal; one or more scramblers configured to scramble each copy to obtain scrambled copies, wherein each copy is scrambled differently; and a combiner configured to combine the scrambled copies to obtain a second digital signal within which the scrambled copies are not identifiable as being related to one of the two or more copies of the at least a part of the first digital signal so that descrambling, at a receiver of the second digital signal, of the scrambled copies using a decryption key for one of the scrambled copies descrambles said one of the scrambled copies into a meaningful output and all other scrambled copies into a non-meaningful output that an error handler of the receiver discards.