Delay Effect on Conversational Quality in Telecommunication Networks: Do We Mind?
Transmission delays are unwanted effects of every day telecommunication systems. These effects influence the overall quality of a telephony connection as perceived by end users. This chapter summarizes known subjective experiments testing the influence of delays on the quality perceived by end users. In order to find a possible explanation for the differences in the results of those experiments a new conversational test was conducted. The new subjective tests are also presented and compared to already existing experiment results.
KeywordsTransmission Delay Mean Opinion Score Test Person Telecommunication Network Subjective Test
This work has been supported by the Czech ministry of Education: MSM 6840770014 “Research in the Area of the Prospective Information and Navigation Technologies.”
- 1.Guegin M, Gautier-Turbin V, Gros L, Barriac V, Le Bouquin-JEannes R, Faucon G (2005) Study of the Relationship between Conversational Quality, and Talking, Listening and Interaction Qualities: towards an Objective Model of the Conversational Quality, Measurement of Speech and Audio Quality in Networks MESAQIN 2005, PragueGoogle Scholar
- 2.Hammer F (2006) Quality Aspects of Packet-Based Interactive Speech Communication, Dissertation Work, Technical University GrazGoogle Scholar
- 3.Hammer F, Reichl P, Raake A (2004) Elements of Interactivity in Telephone Conversations, 8th International Conference on Spoken Language Processing (ICSLP/INTERSPEECH 2004), Jeju Island, KoreaGoogle Scholar
- 4.ITU-T Rec. G.114 (1993/2003) One-way Transmission Time, International Telecommunication Union, GenevaGoogle Scholar
- 5.ITU-T Rec. G.107 (1996/2005) The E-model, a Computational Model for Use in Transmission Planning, International Telecommunication Union, GenevaGoogle Scholar
- 6.ITU-T Rec. P. 800 (1996) Methods for Subjective Determination of Transmission Quality, International Telecommunication Union, GenevaGoogle Scholar
- 7.ITU-T Rec. P. 800.1 (2006) Mean Opinion Score (MOS) Terminology, International Telecommunication Union, GenevaGoogle Scholar
- 8.Karis D (1991) Evaluating Transmission Quality in Mobile Telecommunication Systems using Conversational Tests. In: Human Factors Society 35th Annual Meeting, Santa Monica, CA, 1, 217–221Google Scholar
- 9.Kastner M, Holub J, Tomiska O (2006) Subjective and Objective Conversational Quality Assessment, ETSI STQ Mobile #13, PragueGoogle Scholar
- 11.Moeller S, Jekosch U, Raake A (2000) New Models Predicting Conversational Effects of Telephone Transmission on Speech Communication Quality, Proc. Int. Conf. Spoken Language Processing (ICSLP2000), CHN-Beijing, Vol. II, pp. 190–193Google Scholar