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some info about digital watermarking from the digitalwatermarkingalliance website
Watermarking effectively applies a digital label, or a unique identifier, to an object or piece of content. This is done by manipulating the "noise" in the content and structuring it so it is readable by a computer. For images, pixel values can be adjusted slightly and repeated throughout an entire image or every frame for video. For music, an audio watermark can be hidden in the echoes of other sounds, a millisecond window of opportunity in which the human ear is deaf to anything other than the initial distraction
Digital watermarking is used to help keep track of specific copies of Academy Award nominated movies that are sent to judges and movies shown in theaters, as well as forensics tracking for newly released music,Future applications could "enable artists to engage with fans,"
i see some pretty good ideas that can spin off from this technology.
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