Comparison between the real and theoretical values of the technical parameters of the VoIP codecs

2019 IEEE Colombian Conference on Communications and Computing (COLCOM) Pub Date : 2019-06-01 DOI:10.1109/ColComCon.2019.8809181

Martín Ortega Ortega, Gustavo Chafla Altamirano, Ciro Larco Barros, Mara Falconí Abad

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引用次数: 11

Abstract

The real values of the technical design parameters that voice codecs possess play a very important role when it is desired to size the bandwidth within a Voice over Internet Protocol (VoIP) communications network, so it is important to know these values. Thus, in the work presented below you get the real values of the most common technical design parameters that have of the voice codecs such as payload, bit rate, Packets Per Second (PPS) and frame size, through the Wireshark software for VoIP monitoring. For this, real VoIP calls were made through softphones applications and using different test scenarios. These applications were installed on smartphones and were configured with Session Initiation Protocol (SIP) accounts, where a set of 8 voice codecs was handled. This was done in order to find out if there are variations between the theoretical and real values of these parameters. The results obtained show that there are differences between these values. It is concluded that by directly using the theoretical bandwidth values of voice codecs, the number of users who could communicate at the same time in a VoIP network with SIP accounts would be oversized.

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VoIP编解码器技术参数的实测值与理论值的比较

语音编解码器所具有的技术设计参数的实际值在确定网络语音(VoIP)通信网络的带宽大小时起着非常重要的作用，因此了解这些值非常重要。因此，在下面的工作中，您可以通过用于VoIP监控的Wireshark软件获得具有语音编解码器的最常见技术设计参数的真实值，例如有效载荷，比特率，每秒包数(PPS)和帧大小。为此，通过软电话应用程序并使用不同的测试场景进行真正的VoIP呼叫。这些应用程序安装在智能手机上，并配置了会话发起协议(SIP)帐户，其中处理了一组8个语音编解码器。这样做是为了找出这些参数的理论值和实际值之间是否存在差异。结果表明，这些数值之间存在差异。结果表明，直接使用语音编解码器的理论带宽值，会导致VoIP网络中使用SIP帐号同时通信的用户数量过大。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 IEEE Colombian Conference on Communications and Computing (COLCOM)

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