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Mobile devices have become important companions to most people, and are increasingly used for work and/or entertainment, most of the time consuming multimedia content. Diverse Quality of Service (QoS) metrics help estimate the enduser perceived quality or Quality of Experience (QoE) of the multimedia delivery to these mobile devices. However, energy consumption and device battery lifetime are also...
Due to the tremendous enhancements in the capabilities of mobile devices in recent years and accessibility to higher bandwidth mobile internet, the use of online multimedia learning resources on mobile devices is increasingly becoming popular. Improvements in battery capacity have not matched the same advancements compared to other features of mobile devices. Limited Battery power is introducing a...
Energy conservation has become a critical issue around the world. In smart phones, battery power capabilities are not keeping up with the advances in other technologies (e.g., processing and memory) and are rapidly becoming a concern, especially in view of the growth in usage of energy-hungry mobile multimedia streaming. The deficiency in battery power and the need for reduced energy consumption provides...
In the last few years, several gigabit-class wireless communication standards have reached commercial status, these are mainly driven by the higher demand of fast data transfer in multimedia applications (e.g. wireless HDMI, video streaming, etc.) At the same time, the number of portable devices has been increasing drastically; in the coming decade, the adoption of gigabit-class wireless communication...
The current mobile-handset market is a vital and growing one, being driven by technology advances, including increased bandwidth and processing performance, as well as reduced power consumption and improved screen technologies. The 3 G/4 G handsets of today are multimedia internet devices with increased screen size, HD video and gaming, interactive touch screens, HD camera and camcorders, as well...
Usually wireless communication is preferred to wired communication within caves considering the known difficulties of laying wires and related equipment in such rugged environments. Nevertheless both the inner structures of the caves and RF challenging conditions within the caves make the use of wireless solutions, like walkie-talkies or CB radios, deficient. In this paper, we propose a Wireless Multimedia...
The consumer interest in mobile multimedia content is on the rise, driven by the higher bandwidth of 3G networks and by the availability of low-cost high-resolution mobile devices. However, providing a good user experience remains a challenge due to bandwidth bottlenecks at peak time, channel quality variations and high battery drain incurred by long data transmission times at lower bandwidths. Consequently...
Routing is a challenging task in mobile adhoc network due to nodal mobility, unstable links and limited resources. Swarm intelligence, as demonstrated by biological swarm, such as ant colony has found to be a attractive technique for routing in MANET. However existing swarm intelligence based routing protocols find an optimal path by considering only one or two route selection metrics, such as hop...
Multimedia applications for mobile devices are increasing and growing more sophisticated. Many of these applications require computationally intensive processing, such as image processing, source coding, feature extraction and feature matching. If all of this processing were performed on the mobile device, its limited battery supply would quickly deplete. However, if the request must be transmitted...
A low power reconfigurable DCT architecture is proposed, which can be run at three transform precision levels for different demands. Using the character of energy distribution of the DCT matrix after 2D DCT operation, we selected the best DCT bases which achieve considerable power reduction in DCT operation with minimum image quality degradation. The reconfigurable architecture can achieve power saving...
Three applications in wireless networks where model-free stochastic learning is applicable, are discussed. The learning based optimization problems are formulated and simulation results are presented. Some open issues are also discussed.
Most compiler optimization techniques concern most about speed. In this paper, we present two high-level power/energy optimization methods for ARM-based battery-powered embedded multimedia systems, e.g. mobile phones, pocket PCs, personal multimedia systems, etc. The experiments using MPEG-4 simple profile level 0 (SP@L0) video decoder on ARM920T with two QCIF video sequences 15 fps, 24 kbps show...
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