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An audio watermark is a unique electronic identifier embedded in an audio signal, typically used to identify ownership of copyright. It is similar to a watermark on a photograph. Digital watermarking is the process of embedding information into a signal (e.g. audio, video or pictures) in a way that is difficult to remove. If the signal is ...
The letter invited hackers, cryptologists and others to detect and remove the watermark from some example pieces of music. Several groups became involved, including a group led by Ed Felten. Felten's group claimed to have cracked the scheme and successfully removed the watermark according to the automated judging software supplied by the SDMI.
Some audio/video editing programs may distort, delete, or otherwise interfere with watermarks. Signal/modulator-carrier chromatography may separate watermarks from the recording or detect them as glitches. Additionally, comparison of two separately obtained copies of audio using basic algorithms can reveal watermarks. [citation needed]
It is simply too easy for bad actors to figure out ways to remove the watermarks or bypass the watermarking process. (Compared to images, there is even less consensus about exactly how to ...
For various reasons, everyone likes to talk about the "analog hole" problem with DRM protection: pretty much all security falls down in the face of a well positioned camera and mic setup in the ...
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Only a single channel of audio is required to detect the watermark. The watermark is able to survive re-recording through a microphone. The watermark can be detected through "the production, duplication, distribution, broadcast, and consumer handling of recorded content". [9] (In the white paper for their DVD-Audio Detector Compliance ...
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