| http://www.w3.org/ns/prov#value | - The watermark 12 may also include linking information, such as a phone number or URL in order to facilitate the user's direct purchase of the song or advertised products, or to facilitate some other interaction or transaction with the user. [0030] An embedding unit 45, that embodies the known watermnarking techniques, receives the audio signal 11 and the watermark 12 as inputs, and hides or embeds
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