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Zuverlässige Sprechererkennungs-systeme
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ISBN10: 6202200812
ISBN13: 9786202200813
Publisher: Verlag Unser Wissen
Published: Sep 18 2025
Pages: 116
Weight: 0.36
Height: 0.28 Width: 6.00 Depth: 9.00
Language: German
ISBN13: 9786202200813
Publisher: Verlag Unser Wissen
Published: Sep 18 2025
Pages: 116
Weight: 0.36
Height: 0.28 Width: 6.00 Depth: 9.00
Language: German
In den letzten Jahren hat die Sprechererkennung zwar gro es Potenzial gezeigt, ihre breite Einführung wurde jedoch durch eine suboptimale Leistung behindert, die durch geringe Genauigkeit und Zuverlässigkeitsprobleme gekennzeichnet war. Die Bewältigung dieser Herausforderungen ist jedoch unerlässlich, um die Möglichkeiten der biometrischen Stimmerkennung voll auszuschöpfen, da Umfragen eine Präferenz für biometrische Stimmerkennung zeigen. In Situationen, in denen eine biometrische Fernauthentifizierung von Sprechern eingesetzt wird, ist die Aufrechterhaltung der Integrität der extrahierten Cepstrum-Merkmalsvektoren bei Vorhandensein von Kanalrauschen von grö ter Bedeutung. Um die Genauigkeit der Sprechererkennung in Fernanwendungen zu verbessern, wird ein neuartiger Ansatz vorgeschlagen, bei dem Low-Density-Parity-Check-Codes (LDPC-Codes) und Polarcodes sowohl für die Speicherung als auch für die Übertragung der aus Sprachproben abgeleiteten Mel-Frequenz-Cepstrum-Koeffizienten (MFCC) verwendet werden. Es werden vier vorgeschlagene und implementierte Methoden beschrieben, die zu niedrigeren Bitfehlerraten über verrauschte Kanäle sowie zu einer hohen Genauigkeitsrate für Fernsprecherkennungssysteme führen. Dieses Buch schlie t mit dem Vorschlag, LDPC- und Polarcodierung als integralen Bestandteil der Fernsprecherkennung als Teil eines multimodalen biometrischen Authentifizierungssystems zu verwenden.
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