نتایج جستجو برای: voice over internet protocolvoip

تعداد نتایج: 1314036  

Journal: :JTHTL 2003
J. Scott Marcus

Not so long ago, specific services and the associated networks were closely intertwined. Telecommunications networks delivered voice telephony. Broadcast systems delivered radio and television. The introduction of cable television and satellite transmission resulted in only a marginal increase in complexity. Today, one can no longer say that the service and the network are inextricably intertwi...

2012
Mohd Marufuzzaman

The decoding of the voice audio bit stream is an issue in terms of real-time transmission of high quality voice audio over the Internet. A stand-alone chip to perform decoding is a better solution over software approach. The MPEG audio compression provides high compression with minimal loss. This study describes a VHDL model of MPEG audio layer 1 decoder that perform concurrent processing while...

ارزیابی کیفیت سرویس در ترافیک VoIP (Voice over Internet Protocol) بخشی جدانشدنی در بهبود کیفیت شبکه‌های چندرسانه‌ای است. نیاز کاربران این نوع سرویس به کیفیت مطلوب و تلاش ارائه‌کنندگان این سرویس در کاهش هزینه‌ها و حفظ رضایت کاربران، پژوهشگران را به مطالعاتی در زمینه افزایش کیفیت و کاهش منابع مصرفی در این حوزه سوق داده است. در این مقاله، روشی معرفی شده است تا کیفیت VoIP را به‌صورت وفقی، بهبود و ه...

Journal: :RFC 2008
Henning Schulzrinne Roger Marshall

Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document defines terminology and enumerates requirements for the context resolution of emergency calls placed by the public using voice-over-IP (VoIP) and general Internet multimedia systems, where Internet pro...

2008
H. Schulzrinne

Status of This Memo This memo provides information for the Internet community. It does not specify an Internet standard of any kind. Distribution of this memo is unlimited. Abstract This document defines terminology and enumerates requirements for the context resolution of emergency calls placed by the public using voice-over-IP (VoIP) and general Internet multimedia systems, where Internet pro...

2008
Christian Chita

Compared to traditional (PSTN) voice networks, a Voice over Internet Protocol network is a convergence of a signaling network and a data network using Internet Protocol (IP). The use of shared media by VoIP systems opens the door to some uncertainty as to the source of a call. While in the traditional voice networks one has to tap into a specific circuit to eavesdrop, in an IP network any equip...

Journal: :CoRR 2012
Yusuf Perwej Firoj Parwej

Voice over Internet Protocol (VoIP) is a technology that allows you to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line. Voice over Internet Protocol (VoIP) has led human speech to a new level, where conversation across continents can be much cheaper & faster. However, as IP networks are not designed for real-time applications, the network impai...

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