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Comment Not New (Score 4, Informative) 213 213

This is known as a perceptual hash. We have a perceptual audio hash in pHash, my open source software project that will tell you how similar two media files are to each other. It also features an indexing system to find the best matches from a sample audio clip, a la Shazam. These algorithms are not new by any means, although this patent goes a bit further than simply matching audio samples.

In these matters the only certainty is that there is nothing certain. -- Pliny the Elder

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