@InProceedings{Smékal2007_486,
author = {Zdenek Smékal and Robert Vich},
booktitle = {Studientexte zur Sprachkommunikation: Elektronische Sprachsignalverarbeitung 2007},
title = {SNR-Based Assessment of Quality of Speech Enhancement Using Single-Channel Methods},
year = {2007},
editor = {Klaus Fellbaum},
month = mar,
pages = {149--154},
publisher = {TUDpress, Dresden},
abstract = {In the paper, the authors discuss methods for assessing the quality of
noise-degraded speech using the signal-to-noise ratio (SNR). This objective
assessment is of advantage in the evaluation of speech encoding and also in the
rough assessment of the effectiveness of single-channel methods of speech
enhancement. The application of listening tests is costly and therefore subjective
assessment methods are only used for optimized enhancement methods. First, the
classical definitions of SNR are given, where the knowledge of undisturbed speech
signals is assumed. Besides the classical definitions, the definitions of SNR for
averaging finite signal frames of different energy levels are considered, as is the case
of speech. The case is also discussed when only a mixture of useful signal and noise
is available. Here it is no longer possible to use the classical definitions; it is
necessary to identify noise in speech pauses. For this purpose, a suitable voice
activity decoder (VAD) is necessary. The classical methods for assessing the quality
of speech were mainly proposed and used to assess vocoders, in which it can be
assumed that non-distorted speech signal is available. In the case of single-channel
enhancement methods no uncorrupted speech signal is available and therefore the
definition of SNR must be slightly adapted or new approaches must be sought.},
isbn = {978-3-940046-40-6},
issn = {0940-6832},
keywords = {Signalverarbeitung},
url = {https://www.essv.de/pdf/2007_149_154.pdf},
}