From:    at <tothlINF.U-SZEGED.HU>
Date:    Thu, 5 Nov 1998 12:16:00 MET

>From tothl Thu Nov 5 12:16:39 +0100 1998 remote from inf.u-szeged.hu Date: Thu, 5 Nov 1998 12:16:39 +0100 (MET) From: Toth Laszlo <tothl(at)inf.u-szeged.hu> X-Sender: tothl(at)csilla To: auditory(at)lists.mcgill.ca Subject: voiced/unvoiced detection Message-ID: <Pine.SV4.3.91.981105115242.16577A-100000(at)csilla> MIME-Version: 1.0 Received: from inf.u-szeged.hu by inf.u-szeged.hu; Thu, 5 Nov 1998 12:16 MET Content-Type: TEXT/PLAIN; charset=US-ASCII Content-Length: 1397 Dear List, there is a vast literature on estimating pitch based on simulations of auditory processing. However, there seems to be much less information about how to discriminate pitched and not pitched (noise-like) parts of a signal. In speech processing the voiced/unvoiced decision is usually considered more difficult than the measurement of pitch itself. How would you measure how strong the sensation of "pitchedness"? Does this make sense at all, or it is a binary decision, that is, we either hear or don't hear a pitch? Especially, I'm looking for ideas about how to make the voiced/unvoiced detection of speech using auditory-like processing, eg. the summary autocorrelogram. In this case I'd guess I should measure how strongly the peak "dominates" the summary autocorrelogram. What would give a measure of this? E.g. a narrower peak means more definite pitch sensation than a wide, diffuse one? Or it is the height of the peak compared to its neighborhood that counts? If so, how wide "neighborhood" should I check? Thanks, Laszlo Toth Hungarian Academy of Sciences * Research Group on Artificial Intelligence * "Experience is what you e-mail: tothl(at)inf.u-szeged.hu * gain when you expected http://www.inf.u-szeged.hu/~tothl * something else" Email to AUDITORY should now be sent to AUDITORY(at)lists.mcgill.ca LISTSERV commands should be sent to listserv(at)lists.mcgill.ca Information is available on the WEB at http://www.mcgill.ca/cc/listserv

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DAn Ellis <dpwe@ee.columbia.edu>
Electrical Engineering Dept., Columbia University