I do research in music information retrieval. See the ISMIR 2003 paper below. In... | Hacker News

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		stevetjoa on June 3, 2011 \| parent \| context \| favorite \| on: How Perceptual Hashes Work I do research in music information retrieval. See the ISMIR 2003 paper below. In short, it searches for landmarks in the spectrogram, hashes those landmarks, then compares those hashes against database hashes for temporal continuity. http://www.ee.columbia.edu/~dpwe/papers/Wang03-shazam.pdf A seminal paper on audio fingerprinting is the one by Haitsma and Kalker. http://ismir2002.ismir.net/proceedings/02-fp04-2.pdf

starkdg on June 3, 2011 | [–]

There's a gpl implementation of an audio information retrieval approach here: http://code.google.comp/audioscout/

FlowerPower on June 3, 2011 | [–]

Thanks!

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