A Method for Classifying VoIP System Impairments
نویسندگان
چکیده
The voice quality in Internet Protocol (IP) telephony is significantly influenced by various factors, including delay, delay variation, bandwidth congestion and the distribution of packet loss. Hence, the performance of IP telephony systems is highly dependent on understanding the contribution of these factors to the voice quality. This paper deals about a method for classifying Voice over IP (VoIP) network impairments analyzing the signal power during a phone call. In particular, three main impairments have been considered: packet loss, jitter and bandwidth congestion. From the voice signal some figures of merit have been extracted and used to identify the impairments affecting the communication.
منابع مشابه
Developing Fuzzy Models for Estimating the Quality of VoIP
This paper presents a novel method for modeling the one-way quality prediction of VoIP, non-intrusively. Intrusive measures of voice quality suffer from common deficiency that is the need of reference signal for evaluating the quality of voice. Owing to this lack, a great deal of effort has been recently devoted for modeling voice quality prediction non-intrusively according to quality degradat...
متن کاملEfficient Least-significant-bits Steganography for VoIP
For the instantaneity of real-time applications such as voice over Internet protocol (VoIP), the processing delay and efficiency need to be carefully considered. Matrix coding is a widely used coding scheme for steganography to improve the embedding efficiency which means the average hiding bits per covering bit change. In order to take full advantage of it, a classifying least-significant-bits...
متن کاملDetecting Denial of Service Message Flooding Attacks in SIP based Services
Increasing the popularity of SIP based services (VoIP, IPTV, IMS infrastructure) lead to concerns about its security. The main signaling protocol of next generation networks and VoIP systems is Session Initiation Protocol (SIP). Inherent vulnerabilities of SIP, misconfiguration of its related components and also its implementation deficiencies cause some security concerns in SIP based infra...
متن کاملBreaking barriers for people with voice disabilities: Combining virtual keyboards with speech synthesizers, and VoIP applications
Text-to-speech technology has been broadly used to help people with voice disabilities to overcome their difficulties. With text-to-speech, a person types at a keyboard, the text is synthesized, and the sound comes out through the computer speakers. In recent years, Voice over IP (VoIP) applications have become very popular and have been used by people worldwide. These applications allow people...
متن کاملVoice portal services in packet network and voIP environment
In this paper, we study the voice portal services in packet network and VoIP environment. An extensible VoIPTeleserver for VoIP in SIP (Session Initiation Protocol) environment is described. It is based on the concept of dialogue system and web convergence that separates the channel dependent media resources from the application creation environment. It supports XML based service applications f...
متن کامل