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News, Events & Publications Publications Overview Speech Quality

Speech Quality

Gierlich, H. W.
Pinna Simulator With a Simplified Mathematically Describable Geometry
for Determining the Transfer Functions of Telephone Equipment
CCITT SG XII, Period 1989-1992, September 1991, Com XII

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)

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

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

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

Gierlich, H. W.
Proposal for a Handset Position to be Used With HATS
and the Proposed Simplified Pinna-Simulator Type 3.4
ITU-T SG 12, 05.-15.09.1995, Genf, D.67

Gierlich, H. W.
The Auditory Perceived Quality of Hands-Free Telephones:
Auditory Judgements, Instrumental Measurements and Their Relationship
Speech Communication 20 (1996) 241-254, Oktober 1996

Gierlich, H.W., Krebber, W.
Application of the new P.57 Type 3.4 Ear Simulator With HATS and the new Proposed Handset Position for HATS:
Proposal for the Measurement of Mobile/Cordless Telephones
ITU-T SG 12 Meeting, 07. - 18.04.1997, Genf, COM 12-04-E

Gierlich, H.W., Krebber, W.
Proposal for an annex to P.64 concerning handset positions to be used with HATS according to P.58 and pinna simulator according to P.57 type 3.4
ITU-T SG 12 Meeting, 17. - 27.02.1998, Genf, COM 12-41-E

Gierlich, H.W., Kettler, F.
Speech Quality and IP-Telephony:
Factors Influencing the Speech Transmission Quality
NCF '99, 24.-28.10.1999, Chicago, USA

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

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, Nï¿½ 6, Page 18-21

Gierlich, H.W., Kettler, F.
Background Noise Transmission and Comfort Noise Insertion:
The Influence of Signal Processing on "Speech"-Quality in Complex Telecommunication Scenarios
IWAENC 2001, 10.-13.09.2001, Darmstadt

Gierlich, H.W.
Wideband Speech Communication
The Quality Parameters as Perceived by the User
Forum Acusticum 2005, 29.08.-02.09.2005, Budapest (Ungarn)

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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