pmeerw's blog

Sun, 13 Jan 2008

Wired: DRM Is Dead, But Watermarks Rise From Its Ashes

Wired has an article on the four major record labels abandoning DRM and turning to watermarking, so it seems.

There is also reference to a patent disclosing an audio watermarking scheme dubbed 'El Dorado' assigned to Microsoft. Inventors: D. Kirovski & H. Malvar. "What is claimed is: 1. A method for encoding values within a digital audio signal, the method comprising: receiving the digital audio signal having frequency magnitude components; analyzing the relative energy levels of the frequency magnitude components of the signal; determining whether the signal has a large discrepancy in the relative energy levels of the frequency magnitude components, wherein the large discrepancy is a discrepancy of a factor of three or more; encoding at least one bit of the digital watermark into the digital signal based on the determination."

posted at: 21:49 | path: /academic | permanent link

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