Quality Dimensions of Narrowband and Wideband Speech Transmission
The study presented in this paper aims at exploring the perceptual spaces evoked for users of two different telephone scenarios: traditional narrowband speech transmission, and mixed narrowband/wideband speech transmission that may be encountered in today's Voice-over-IP services. Underlying dimensions that constitute the skeleton of these spaces are revealed by auditory experiments, following two different paradigms of judgment: a) Similarity-scaling, and b) Attribute-scaling (Semantic Differential) with subsequent a) Multidimensional Scaling, and b) Principal Component Analysis of a diverse set of stimuli. Similar configurations are obtained which are unequivocally interpretable. Three common dimensions, valid for both the narrowband and the wideband scenario can be identified: “Discontinuity”, “Noisiness”, and “Coloration”. In addition, the wideband space is extended by a further, wideband-specific dimension. Integral listening-quality can well be modeled by means of these dimensions. In both scenarios, “Discontinuity” represents the most important quality feature. The presented work forms the basis for instrumental diagnostic quality measures.
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Document Type: Research Article
Publication date: November 1, 2010
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- 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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