Real-time portable multi-layer perceptron voice fundamental-period extractor for hearing aids and cochlear implants
نویسندگان
چکیده
Previous work has shown that it is possible to train a multi-layer perceptron to estimate the voice fundamental period (Tx) for multiple speakers in the presence of high levels of background noise. The algorithm has been implemented in real-time on a TMS320C25 based development system. A prototype pocket-sized portable device has been constructed and the real-time software transferred to it. This will provide the basis for a new generation of signal processing hearing aids for the profoundly and totally deaf. Power supply current is sufficiently low for battery operation for periods of 12 hours between charges. The basic algorithm has been adapted to provide the higher time resolution which will make it applicable to a wide range of other applications. Zusammenfassung. Wie fruhere Arbeiten gezeigt haben, ist es moglich ein mehrschichtiges Perzeptron darauf zu trainieren, die Grundperiode von Sprachsignalen sprecherunabhangig hei hohen Gerauschpegeln zu bestimmen. Der Algorithmus wurde in Echtzeit auf einem Signalprozessorsystem TMS320C25 entwickelt. Diese Software wurde auf einen tragbaren Prototypen in Taschenformat portiert. Dieser Entwurf liefert die Basis fur eine neue Generation signalverarbeitender Horhilfen fur schwerst horgeschadigte und vollig taube Patienten. Der Energiebedarf ist hinreichend klein, um einen 12-stundigen Akkubereich zu errnoglichen. Der Grundalgorithmus wurde dahingehend erweitert, eine bessere Zeitauflosung herzustellen, damit er fiir zahlreiche andere Anwendungsgebiete eingesetzt werden kann. RBsume. Travaux anterieurs ont demontre la possibilite d'entrainer un perceptron a niveaux multiples pour l'estimation de la pkriode fondamentale ( T x ) de signaux produits par differents locuteurs parlant dans des conditions de bruit intense. L'algorithme a et6 implante en temps reel et realise sur un systbme de developpement TMS320C25. Un prototype portatif incorporant le logiciel a CtC construit. I1 servira de base a une nouvelle generation de prothbses auditives a traitement de signal pour les sourds profonds. G r k e a une tres faible consommation, I'autonomie de l'appareil est de 12 heures sans recharge. L'algorithme a etit ameliore afin d'augmenter sa rtsolution temporelle ce qui le rendra interessant pour une large serie d'autres applications.
منابع مشابه
Study and Comparison of Formant Characteristics of Persian Vowels in 4-7-year-old Children Using Cochlear Implants and Those Using Hearing Aids
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ورودعنوان ژورنال:
- Speech Communication
دوره 9 شماره
صفحات -
تاریخ انتشار 1990