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—This paper addresses the use of adaptive modulation in progressive image transmission with multiple description coding in conjunction with an Orthogonal Frequency Division Multiplexing (OFDM) system. Specifically, two adaptive systems are considered: variable rate with fixed power, and variable rate with variable power. An algorithm is proposed to allocate(More)
The traditional method of centralized backup suffers from single point of failure and scalability problem. It is therefore beneficial to carry out the backup service over geographically distributed networks. Hence, redundant copies of data stored in such networks are essential to ensure the availability and reliability of the backup data. The main objective(More)
Authors maintain the copyright. Abstract An important part of the information transfer in human-human communication is conducted nonverbally and often even unconsciously. Thus, controlling the information flow in such an interaction proves to be a difficult task, a fact which can cause various social problems. This paper explores the use of wearable(More)
—Average throughput maximization has commonly been used as an alternative to image or video average distortion minimization. However, as the throughput-distortion curve is non-linear, throughput maximization can be very different from distortion minimization if the variance of the throughput is large. Under high channel quality variability, the variance of(More)
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