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Bücher Wissen & Bildung Naturwissenschaft, Medizin, Informatik, Technik Physik & Astronomie Mechanik & Akustik Pitch Determination of Speech Signals
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Pitch Determination of Speech Signals
W. Hess (Gebundene Ausgabe, Deutsch)
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Beschreibung
Pitch (i.e., fundamental frequency FO and fundamental period TO) occupies a key position in the acoustic speech signal. The prosodic information of an utterance is predominantly determined by this parameter. The ear is more sensitive to changes of fundamental frequency than to changes of other speech signal parameters by an order of magnitude. The quality of vocoded speech is essentially… influenced by the quality and faultlessness of the pitch measure ment. Hence the importance of this parameter necessitates using good and reliable measurement methods. At first glance the task looks simple: one just has to detect the funda mental frequency or period of a quasi-periodic signal. For a number of reasons, however, the task of pitch determination has to be counted among the most difficult problems in speech analysis. 1) In principle, speech is a nonstationary process; the momentary position of the vocal tract may change abruptly at any time. This leads to drastic variations in the temporal structure of the signal, even between subsequent pitch periods, and assuming a quasi-periodic signal is often far from realistic. 2) Due to the flexibility of the human vocal tract and the wide variety of voices, there exist a multitude of possible temporal structures. Narrow-band formants at low harmonics (especially at the second or third harmonic) are an additional source of difficulty. 3) For an arbitrary speech signal uttered by an unknown speaker, the fundamental frequency can vary over a range of almost four octaves (50 to 800 Hz). Dieses Produkt haben wir gerade leider nicht auf Lager.
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Technische Daten
Erscheinungsdatum
01.06.1983
Sprache
Deutsch
EAN
9783540119333
Herausgeber
Springer Berlin
Serien- oder Bandtitel
Springer Series in Information Sciences
Sonderedition
Nein
Autor
W. Hess
Seitenanzahl
700
Einbandart
Gebundene Ausgabe
Buch Untertitel
Algorithms and Devices
Bandzählung
3
Schlagwörter
Digitale Signalverarbeitung, phase, Sprachsignal, information, Grundfrequenzanalyse, structure, Speech, Signals, quality, ultrasound, influence
Thema-Inhalt
PHDS - Wellenmechanik (Vibration und Akustik)
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