Video slice and active region based dual partial encryption

Details Video slice and active region based dual partial encryption Video slice and active region based dual partial encryption

H - Electricity

04

N

H04N 7/50 (2006.01) H04N 21/4405 (2011.01) H04N 5/44 (2011.01)

Patent

CA 2746510

A selective encryption encoder and method of dual selective encryption. The selective encryption encoder has a packet identifier that identifies packets of at least one specified packet type, the at least one specified packet type being any of a plurality of packet types including packets containing a video slice headers or packets carrying data appearing in an active area of the image. A packet duplicator duplicates the identified packets to produce first and second sets of the identified packets. The packets are sent to and from a primary encryption encoder to encrypt the first set of identified packets under a first encryption method. A secondary encrypter encrypts the second set of identified packets under a second encryption method.

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