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Speech Quality
Gierlich, H. W.
New Measurement Methods for Determining the Transfer Characteristics of Telephone Terminal Equipment
IEEE International Symposium on Circuits and Systems, 10-13.05.1992,
San Diego, Californien, Vol. 4 S. 2069-2072 (0-7803-0593-0/92 1992 IEEE)
 
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Gierlich, H.W.
Artificial Head Technique With a new Type of Pinna-Simulator
CCITT SG II Interim Meeting, 28.09.-02.10.1992, Genf, D.144
 
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Gierlich, H.W.
A Measurement Technique to Determine the Transfer Characteristics
of Hands-Free Telephones

Signal Processing, Vol. 27, Issue 3, 1992, S. 281-300
 
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Kettler, F., Gierlich, H.W.
Convergence Behavior of Speech Echo Cancellers
Including ADPCM-Coder in the Echo Path

ITU-Meeting SG 15, 16.-27.05.1994, Genf, COM-12-00-E
 
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Gierlich, H.W., Kettler, F.
Speech Quality and IP-Telephony:
Factors Influencing the Speech Transmission Quality

NCF '99, 24.-28.10.1999, Chicago, USA
 
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Gierlich, H.W.
IP Telephony and Some Factors that Influence Speech Quality
Carrier IP 2000 Comprehensive Report, NCF presentation by IEC,
Juli 2000, S. 265 - 271
 
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Scholl, R., Freisse, J.L., Berger, J., Klaus, H., Kliche, I., Michael, K.D.,
Scheerbarth, Th., Gierlich, H.W., Kettler, F.
State-of-the-art, end-to-end speech quality for voice over IP:
Impressions of the first ETSI voice over IP (VoIP) speech quality test event

QSDG Magazine, February/March 2001, Vol. 3, N� 6, Page 18-21
 
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Gierlich, H.W.
Wideband Speech Communication
The Quality Parameters as Perceived by the User

Forum Acusticum 2005, 29.08.-02.09.2005, Budapest (Ungarn)
 
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Gierlich, H.W.; Kettler, F.
Advanced speech quality testing of modern telecommunication equipment:
An overview

Signal Processing 86 (2006) 1327-1340
 
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