Patent ID: 9082172
Filing Date: 2015-07-14
Classification: G06T,H04N

Abstract:
1. A device for generating metadata associated with content intended to be watermarked with an identifier stored in a device for embedding a watermark wherein said device for generating metadata comprises a processor configured to: generate an instruction in the metadata for deriving a current payload bit from said identifier so as to enable the device for embedding the watermark to obtain a bit from said identifier located at a position given by a lookup index, the lookup index indicating a position in the identifier that corresponds to the current payload bit to embed, or said identifier to enable the watermark embedding device to apply an exclusive or operation to a plurality of bits of said identifier, wherein said plurality of bits is obtained using a binary mask contained in said instruction, the metadata further comprising a number of instructions for embedding said current payload bit in said content according to a spreading sequence wherein the number of instructions for embedding corresponds to a length of the spreading sequence, wherein said instruction for embedding said current payload bit comprises a first embedding value corresponding to a payload bit value of ‘0’ and a second embedding value corresponding to a payload bit value of ‘1’ and wherein at least one pair of embedding values are ordered according to said spreading sequence.