Progressive video refresh slice detection

Details Progressive video refresh slice detection Progressive video refresh slice detection

H - Electricity

04

N

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

Patent

CA 2709393

A selective encryption encoder and method of dual selective encryption and detection of intra-coded slices in video content. 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 packets in a set of N consecutive slices in a frame wherein the a second byte after a slice start code is identical in all N consecutive slices. 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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