Title :
Speech quality prediction in VoIP using the extended E-model
Author :
Ding, Lijing ; Goubran, Rafik A.
Author_Institution :
Dept. of Syst. & Comput. Eng., Carleton Univ., Ottawa, Ont., Canada
Abstract :
The paper investigates the effects of packet loss and delay jitter on speech quality in voice over Internet protocol (VoIP) scenarios. A new formula is proposed to quantify these effects and incorporated into ITU-T G.107, the E-model. In the simulation, codecs ITU-T G.723.1 and G.729 are used; random packet loss and Pareto distributed network delay are introduced. The prediction errors range between -0.20 and +0.12 MOS (mean opinion score). The formula extends the coverage of the current E-model, and is very useful in MOS prediction as well as network planning.
Keywords :
Internet telephony; Pareto distribution; delays; integrated voice/data communication; jitter; quality of service; speech codecs; transport protocols; ITU-T G.107; Pareto distribution; QoS; VoIP; codec ITU-T G.723.1; codec ITU-T G.729; delay jitter; extended E-model; mean opinion score; network planning; packet loss; prediction errors; random packet loss; speech quality prediction; voice over Internet protocol; Codecs; Delay effects; Distortion measurement; Drives; Internet telephony; Jitter; Psychology; Speech analysis; Systems engineering and theory; Testing;
Conference_Titel :
Global Telecommunications Conference, 2003. GLOBECOM '03. IEEE
Print_ISBN :
0-7803-7974-8
DOI :
10.1109/GLOCOM.2003.1258975
