Adaptive Speech Quality in Voice-over-ip Communications
نویسندگان
چکیده
منابع مشابه
Prototype of an Adaptive Voice Coder for IP Telephony
Purpose of this paper is to describe the theoretical basis, design and implementation of a communication system based on an adaptive voice coder tuned for IP real-time voice communications. The developed voice coder makes use of an adaptive algorithm which performs an automatic coding switch, according to the evolving congestion conditions of the underlying IP network, in order to render the co...
متن کاملAdaptive Voice over IP
We discuss the technical viability of transporting real-time voice over IP networks when the output rate of the speech encoder is adjusted to match the characteristics of the network: speech is coded at low bit rates when the network is congested; at higher bit rates, otherwise. First, issues affecting perceptual QoS are analyzed. The rationale for Adaptive Voice over IP (AVoIP) is explained an...
متن کاملA simulation study of adaptive voice communications on IP networks
This paper presents simulation results outlining the behavior of rate-adaptive voice communications over IP networks. In the considered architecture, voice coders adapt their rate to the current state of the network, so as to generate only the bandwidth that the network is capable of carrying. An algorithm is proposed for driving the transmission rate of voice sources on the basis of estimation...
متن کاملPerceptual Evaluation Of Playout Buffer Algorithm For Enhancing Perceived Quality Of Voice Transmission Over Ip Network
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...
متن کاملAdaptive VoIP with Audio Watermarking for Improved Call Quality and Security
In this paper we describe a novel adaptive method of speech quality control which may be used to adjust three call parameters: speech codec configuration, playout buffer size, and amount of FEC (Forward Error Correction) mechanism information during VoIP (Voice over Internet Protocol) call under changing network conditions. This solution differs from previously proposed because it utilizes audi...
متن کامل