The performance levels of most current speech recognizers degrade significantly when
environmental noise occurs during use. Such performance degradation is mainly caused by …

Digital signal processing plays a central role in the development of modern communication
and information processing systems. The theory and application of signal processing is …

Quality of Telephone-Based Spoken Dialogue Systems is a systematic overview of
assessment, evaluation, and prediction methods for the quality of services such as travel …

In this work, normalization techniques in the acoustic feature space are studied which
improve the robustness of automatic speech recognition systems. It is shown that there is a …

We propose a novel feature processing technique which can provide a cepstral liftering
effect in the log‐spectral domain. Cepstral liftering aims at the equalization of variance of …

Knowledge-based speech recognition systems extract acoustic cues from the signal to
identify speech characteristics. For channel-deteriorated telephone speech, acoustic cues …

In a telephone link, the voice timbre is impaired by spectral distortions generated by the
analog parts of the link. Our purpose is to restore a timbre as close as possible to that of the …

This paper proposes a classification module for fricative consonants in telephone speech
using an acoustic-phonetic feature extrapolation technique. In channel-deteriorated …

Résumé Ce travail de thèse s' intéresse à la reconnaissance automatique du locuteur (RAL)
dans les réseaux professionnels de communication (Private Mobile Radio networks: PMR) …

This paper addresses the impact of telephone transmission channels on automatic speech
recognition (ASR) performance. A real-time simulation model is described and implemented …