Best Approach for Video Codec Selection Over VoIP Conversation Using Wireless Local Area Network

Mohd Nazri Ismail
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Mohd Nazri Ismail: University of Kuala Lumpur, Malaysia

International Journal of Interdisciplinary Telecommunications and Networking (IJITN), 2011, vol. 3, issue 1, 36-49

Abstract: This study evaluates video codec performance over VoIP using a campus wireless network. Today, the deployment of VoIP occurs in various platforms, including VoIP over LAN, VoIP over WAN and VoIP over VPN. Therefore, this study defines which video codec provides good video quality over VoIP transmission. The soft phone is used as a medium for communication between two parties. A network management system is used to evaluate and capture the video quality performance over VoIP. The quality of video codec is based on MOS, jitter, delay and packet loss. The experimental scope is limited to G.722 with MP4V-ES, G.726 (16) with H.261 and G.726 (24) with H.264. The results show that audio codec G.722 with MP4V-ES generates good video quality over VoIP using wireless local area network. Whereas audio codec G.726 (16) with H.261 generates low rate video and voice quality performance. Therefore, using the appropriate video and audio, the codec selection increases video quality over VoIP transmission.

Date: 2011
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