Verwandte Artikel zu HD Telephony by Artificial Bandwidth Extension: Quality,...
HD Telephony by Artificial Bandwidth Extension: Quality, Concepts and Complexity (ABDN: Aachener Beiträge zu Digitalen Nachrichtensysteme) - Softcover
Inhaltsangabe
The audio bandwidth of digital landline and mobile telephone networks is still mostly restricted to 200 Hz to 3.4 kHz. This is due to compatibility requirements during the transition phase from analogue to digital transmission technology. The resulting characteristic “telephone speech” is widely accepted, but the intelligibility of syllables is only 91%. Meanwhile, improved coding standards for so-called “HD voice” or “Wideband Speech” have been developed which are gradually being introduced into the networks. They support an audio frequency bandwidth of 50 Hz to 7.0 kHz with significantly increased audio quality and speech intelligibility. For a very long time however, new HD-telephones and old narrowband telephones have to co-exist. If an HD-terminal is connected over a narrowband link to an old telephone, the improved coding scheme cannot be used.
Die Inhaltsangabe kann sich auf eine andere Ausgabe dieses Titels beziehen.
Suchergebnisse für HD Telephony by Artificial Bandwidth Extension: Quality,...
Beispielbild für diese ISBN
HD Telephony by Artificial Bandwidth Extension
Anbieter: GreatBookPrices, Columbia, MD, USA
Verkäuferbewertung 5 von 5 Sternen
Zustand: As New. Unread book in perfect condition. Bestandsnummer des Verkäufers 41468023
Gebraucht kaufen
EUR 44,50
EUR 2,36 Versand
Versand innerhalb von USA
Versand innerhalb von USA
Anzahl: 2 verfügbar
Beispielbild für diese ISBN
HD Telephony by Artificial Bandwidth Extension
Anbieter: PBShop.store UK, Fairford, GLOS, Vereinigtes Königreich
Verkäuferbewertung 5 von 5 Sternen
PAP. Zustand: New. New Book. Shipped from UK. Established seller since 2000. Bestandsnummer des Verkäufers GZ-9783958863507
Neu kaufen
EUR 44,03
EUR 7,03 Versand
Versand von Vereinigtes Königreich nach USA
Versand von Vereinigtes Königreich nach USA
Anzahl: 1 verfügbar
Beispielbild für diese ISBN
HD Telephony by Artificial Bandwidth Extension
Anbieter: GreatBookPrices, Columbia, MD, USA
Verkäuferbewertung 5 von 5 Sternen
Zustand: New. Bestandsnummer des Verkäufers 41468023-n
Neu kaufen
EUR 50,11
EUR 2,36 Versand
Versand innerhalb von USA
Versand innerhalb von USA
Anzahl: 2 verfügbar
Foto des Verkäufers
HD Telephony by Artificial Bandwidth Extension
Anbieter: Rarewaves.com USA, London, LONDO, Vereinigtes Königreich
Verkäuferbewertung 5 von 5 Sternen
Paperback. Zustand: New. The audio bandwidth of digital landline and mobile telephone networks is still mostly restricted to 200 Hz to 3.4 kHz. This is due to compatibility requirements during the transition phase from analogue to digital transmission technology. The resulting characteristic "telephone speech" is widely accepted, but the intelligibility of syllables is only 91%.Meanwhile, improved coding standards for so-called "HD voice" or "Wideband Speech" have been developed which are gradually being introduced into the networks. They support an audio frequency bandwidth of 50 Hz to 7.0 kHz with significantly increased audio quality and speech intelligibility. For a very long time however, new HD-telephones and old narrowband telephones have to co-exist. If an HD-terminal is connected over a narrowband link to an old telephone, the improved coding scheme cannot be used.In this thesis, signal processing concepts are developed for improving audio quality and intelligibility of narrowband speech by artificial bandwidth extension (ABWE). These algorithms can be applied in the HD terminals or in the network, to transform narrowband speech to HD voice. Based on the source-filter model of speech production and a priori knowledge of the characteristics of speech signals, the missing frequency components between 3.4 kHz and 7 kHz are reconstructed. In comparison to the state-of-the-art ABWE approaches, the main contributions are:. new concepts of estimating the wideband spectral envelope, e.g., in terms of the model filter by interpolation in the acoustic tube domain. algorithms for spectral extension of the excitation signal. new insights concerning the relative importance of the excitation, the temporal envelope and the spectral envelope. remarkable improvements of the audio quality . significant low computational complexity. efficient and effective training and estimation algorithms The improvements are verified by objective evaluation and subjective listening tests. Bestandsnummer des Verkäufers LU-9783958863507
Neu kaufen
EUR 54,67
Versand gratis
Versand von Vereinigtes Königreich nach USA
Versand von Vereinigtes Königreich nach USA
Anzahl: 1 verfügbar
Beispielbild für diese ISBN
HD Telephony by Artificial Bandwidth Extension: Quality, Concepts and Complexity
Anbieter: Kennys Bookshop and Art Galleries Ltd., Galway, GY, Irland
Verkäuferbewertung 5 von 5 Sternen
Zustand: New. 2021. 1st Edition. paperback. . . . . . Bestandsnummer des Verkäufers V9783958863507
Neu kaufen
EUR 47,66
EUR 9,50 Versand
Versand von Irland nach USA
Versand von Irland nach USA
Anzahl: 1 verfügbar
Beispielbild für diese ISBN
HD Telephony by Artificial Bandwidth Extension
Anbieter: GreatBookPricesUK, Woodford Green, Vereinigtes Königreich
Verkäuferbewertung 5 von 5 Sternen
Zustand: New. Bestandsnummer des Verkäufers 41468023-n
Neu kaufen
EUR 44,02
EUR 17,97 Versand
Versand von Vereinigtes Königreich nach USA
Versand von Vereinigtes Königreich nach USA
Anzahl: 2 verfügbar
Beispielbild für diese ISBN
HD Telephony by Artificial Bandwidth Extension
Anbieter: GreatBookPricesUK, Woodford Green, Vereinigtes Königreich
Verkäuferbewertung 5 von 5 Sternen
Zustand: As New. Unread book in perfect condition. Bestandsnummer des Verkäufers 41468023
Gebraucht kaufen
EUR 47,85
EUR 17,97 Versand
Versand von Vereinigtes Königreich nach USA
Versand von Vereinigtes Königreich nach USA
Anzahl: 2 verfügbar
Beispielbild für diese ISBN
HD Telephony by Artificial Bandwidth Extension: Quality, Concepts and Complexity
Anbieter: Kennys Bookstore, Olney, MD, USA
Verkäuferbewertung 5 von 5 Sternen
Zustand: New. 2021. 1st Edition. paperback. . . . . . Books ship from the US and Ireland. Bestandsnummer des Verkäufers V9783958863507
Neu kaufen
EUR 58,61
EUR 9,38 Versand
Versand innerhalb von USA
Versand innerhalb von USA
Anzahl: 1 verfügbar
Beispielbild für diese ISBN
HD Telephony by Artificial Bandwidth Extension
Anbieter: Gazelle Books, Lancaster, LANCA, Vereinigtes Königreich
Verkäuferbewertung 5 von 5 Sternen
Paperback. Zustand: New. New Book, Direct from Publisher. Bestandsnummer des Verkäufers 9783958863507
Neu kaufen
EUR 40,71
EUR 65,90 Versand
Versand von Vereinigtes Königreich nach USA
Versand von Vereinigtes Königreich nach USA
Anzahl: 1 verfügbar
Foto des Verkäufers
HD Telephony by Artificial Bandwidth Extension
Anbieter: Rarewaves.com UK, London, Vereinigtes Königreich
Verkäuferbewertung 5 von 5 Sternen
Paperback. Zustand: New. The audio bandwidth of digital landline and mobile telephone networks is still mostly restricted to 200 Hz to 3.4 kHz. This is due to compatibility requirements during the transition phase from analogue to digital transmission technology. The resulting characteristic "telephone speech" is widely accepted, but the intelligibility of syllables is only 91%.Meanwhile, improved coding standards for so-called "HD voice" or "Wideband Speech" have been developed which are gradually being introduced into the networks. They support an audio frequency bandwidth of 50 Hz to 7.0 kHz with significantly increased audio quality and speech intelligibility. For a very long time however, new HD-telephones and old narrowband telephones have to co-exist. If an HD-terminal is connected over a narrowband link to an old telephone, the improved coding scheme cannot be used.In this thesis, signal processing concepts are developed for improving audio quality and intelligibility of narrowband speech by artificial bandwidth extension (ABWE). These algorithms can be applied in the HD terminals or in the network, to transform narrowband speech to HD voice. Based on the source-filter model of speech production and a priori knowledge of the characteristics of speech signals, the missing frequency components between 3.4 kHz and 7 kHz are reconstructed. In comparison to the state-of-the-art ABWE approaches, the main contributions are:. new concepts of estimating the wideband spectral envelope, e.g., in terms of the model filter by interpolation in the acoustic tube domain. algorithms for spectral extension of the excitation signal. new insights concerning the relative importance of the excitation, the temporal envelope and the spectral envelope. remarkable improvements of the audio quality . significant low computational complexity. efficient and effective training and estimation algorithms The improvements are verified by objective evaluation and subjective listening tests. Bestandsnummer des Verkäufers LU-9783958863507
Neu kaufen
EUR 45,65
EUR 77,88 Versand
Versand von Vereinigtes Königreich nach USA
Versand von Vereinigtes Königreich nach USA
Anzahl: 1 verfügbar