Patent ID: 6330672
Filing Date: 2001-12-11
Classification: G06T,G10L,H04N

Abstract:
Apparatus for inserting a digital watermark into protected information comprisesa transformation function of a perceptual coder for coding an information signal representative of the protected information,a watermark location selector responsive to the perceptual coder for selecting a location for inserting a digital watermark, said watermark location selector including a logical gate responsive to a random number generator, said random number generator, responsive to a seed and a selection of a watermark overhead, for outputting a binary sequence,a digital watermark generator for generating a digital watermark sequence responsive to a plurality of predetermined watermark parameters anda quantizer of the perceptual coder responsive to the digital watermark generator and the watermark location selector for inserting a digital watermark at selected locations within an output bitstream, said output bitstream including the perceptually coded information signal.