Conventional objective means of characterizing communications systems are often inadequate. In particular when a system contains nonlinear elements such as low bit-rate encoders, some types of speech transducer, active gain control, and echo-cancellers, simple steady-state measurements are not sufficient to predict subjective performance. The use of speech-like test stimuli to characterize nonlinear systems is not new but this paper presents a new speech-like composite signal which works in conjunction with a new perception-based objective measure to provide a versatile measurement technique. Early results are given which indicate the usefulness of the method to provide a perceptual ranking for communications systems, and also as a diagnostic tool.

Authors: Hollier, M. P.; Guard, D. R.; Hawksford, Malcolm J.
Affiliations: B T Laboratories, Martlesham Heath, Ipswich, UK ; University of Essex, Department of Electronic Systems Engineering, Colchester, UK(See document for exact affiliation information.)
AES Convention: 93 (October 1992) Paper Number: 3395
Publication Date: October 1, 1992
Subject: Measurement

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