A Study of the performance of an VoIP System

• Main Authors: Chan-Lu Chen, 陳冠儒
• Other Authors: Wei-Chih Hsu
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/37051901015592408306

碩士 === 國立高雄第一科技大學 === 電腦與通訊工程所 === 96 === Internet application has been changing day after day from searching and transmitting simple data to multimedia applications. It has become a home appliance rather than a professional tool only. It serves us as telephone, television, etc, and Internet Phone is very popular at the moment. The Internet Phone, PC to PC framework for voice/video communication, discussing in this paper is based on VoIP, including technologies such as network programming, voice processing, speech codec, image processing, video codec, and real time transmission. All these techniques are practiced perfectly in WengoPhone. WengoPhone, an Internet Phone software, enable you to have a free talk on Internet, was written by Wengo’s company officially taking over the project. With the spirit of Open Source SoftwareTM,they licensed this program under the GNU General Public License. In Client,The specific of WengoPhone is including speech operateion,voice buffer process,video operateion, image buffer process, several speech codec technologies and H.263 video codec to adapt different bandwidth environments. In Server,To choose SIPp software to transport big message by test in Server.If Server can receive big message by test for requirement can be to accept. In Clint,This thesis is to probe the performance of Internet Phone by discussing the example of WengoPhone.To test performance of different environment.In Server is to probe the performance of server by discussing the example of SIPp. For observing how it works, knowing the influence of different environment, and getting data to analyze its reason would be seen in the following pages.