Patent ID: 9473829
Filing Date: 2016-10-18
CPC Classification: H04N

Claim Text:
1. A method for format-compliant encryption of an H.264/MPEG-4 AVC compliant bit stream comprising a plurality of units, the method comprising: determining, using at least one processor, a type of a first unit of the H.264/MPEG-4 AVC compliant bit stream; when the first unit is a first type, encrypting, using the at least one processor, the first unit of the H.264/MPEG-4 AVC compliant bit stream to obtain an encrypted unit; inserting, using the at least one processor, the encrypted unit in a second unit, the second unit being of a second type compliant with H.264/MPEG-4 AVC; inserting, using the at least one processor, the second unit into the bit stream; and inserting, using the at least one processor, into the bit stream a substitution unit of the first type in place of the first unit, wherein a unit of the first type comprises a header and a body; and obtaining, using the at least one processor, the substitution unit for the first unit by combining header data from the first unit with header data and body data of a generic unit of the first type.