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Estimating the Quality of Synthesized and Natural Speech Transmitted Through Telephone Networks Using Single-ended Prediction Models

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This paper reports on experiments to estimate the speech output quality of telephone services in an instrumental way, using single-ended quality prediction models. It addresses both naturally-produced as well as synthesized speech generated with a Text-To-Speech (TTS) system. Three auditory tests have been carried out where typical speech samples have been transmitted over various telephone channels, and then judged by listeners with respect to their overall quality. The mean auditory ratings obtained in these tests have been compared to estimates provided by three different single-ended models, one of which is currently recommended by the International Telecommunication Union for predicting the quality of naturally-produced speech. Correlations between auditory and estimated quality scores vary considerably between experiments. It is concluded that the single-ended models mainly predict the effects of the transmission channel, but not of the (naturally-produced or synthesized) source speech material.
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Document Type: Research Article

Publication date: January 1, 2008

More about this publication?
  • Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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