Microsoft could soon implement a new watermarking system for music that would discourage piracy without restricting the usefulness of the music, according to a newly granted patent. Titled "Stealthy Audio Watermarking," the patent originally filed in May 2004 would use audio analysis to automatically place a digital signature inside the sound itse...

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	www.macnn.com/articles/07/09/12/microsoft.no.drm.watermark/