VIDEO COPY-CONTROL WITH PLURAL EMBEDDED SIGNALS

Video is processed to imperceptibly convey two or more auxiliary data (i.e., watermarks). In particular embodiments, the auxiliary data are independent and/or encoded at different strengths. The encoding may be performed by transforming the auxiliary data into a two-dimensional array, and combining this two-dimensional array with corresponding pixels of a video frame. Embodiments of the technology are particularly useful in implementing video copy control systems.