The performance of IP telephony systems is highly dependent on the audio codecs and their reaction to packet loss and instantaneous delays. Understanding the interaction between audio encoding and the dynamic behavior of the Internet is significant for designing adaptive audio transport mechanisms. For this purpose, we conducted a large-scale audio transmission experiment over the Internet in a...

Robust adaptive estimation of unknown parameter has been an important issue in recent years for reliable operation in the distributed networks. The conventional adaptive estimation algorithms that rely on mean square error (MSE) criterion exhibit good performance in the presence of Gaussian noise, but their performance drastically decreases under impulsive noise. In this paper, we propose a rob...

For transporting voice data with silence suppression over the Internet, the problem of jitter introduced from the network often renders the speech unintelligible. It is thus essential to offer intramedia synchronization to remove jitter while retaining minimal playout delay. We have previously proposed a neural– network–based intra–voice synchronization mechanism, called Intelligent Voice Smoot...

in this paper, an adaptive neuro fuzzy sliding mode based genetic algorithm (anfsga) controlsystem is proposed for a ph neutralization system. in ph reactors, determination and control of ph isa common problem concerning chemical-based industrial processes due to the non-linearity observedin the titration curve. an anfsga control system is designed to overcome the complexity of precisecontrol o...

Database systems which support preorchestrated multimedia presentations must be able to adapt the resource demand of executing presentations. Such adaptations can be dictated by underlying resource management components. When resources are not reserved, such adaptations are necessary to overcome uctuating resource availability. Adaptations across components of presentations as well as across co...

Synchronization of multimedia streams is one of the important issue in multimedia communications. In this paper, we propose an adaptive synchronization agency for synchronization of streams by using an agent based approach. The synchronization agency triggers one of the three synchronization mechanisms, point synchronization or real-time continuous or adaptive synchronization in order to adapt ...

Perceived voice quality is a key metric in VoIP applications. The quality is mainly affected by IP network impairments such as delay, jitter and packet loss. Playout buffer at the receiving end can be used to compensate for the effects of jitter based on a tradeoff between delay and loss. Adaptive smoothing algorithms are capable of adjusting dynamically the smoothing time based on the network ...

The stability of learning rate in neural network identifiers and controllers is one of the challenging issues which attracts great interest from researchers of neural networks. This paper suggests adaptive gradient descent algorithm with stable learning laws for modified dynamic neural network (MDNN) and studies the stability of this algorithm. Also, stable learning algorithm for parameters of ...

This paper assumes each user has more than one queue, derives a new packet-dependant proportional fairness power allocation pattern based on the sum of weight capacity and the packet’s priority in users’ queues, and proposes 4 new cross-layer packet-dependant OFDM scheduling schemes based on proportional fairness for heterogeneous classes of traffic. Scenario 1, scenario 2 and scenario 3 lead r...