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Due to the recent popularization of digital broadcasting system, delivering continuous media data, i.e., audio and video, has attracted great attention. In broadcasting systems, clients generally have to wait until their desired data are broadcast. Therefore, many researches have proposed several methods to reduce waiting time in continuous media data broadcasting. In this paper, we implement the...
Recently, hybrid broadcasting systems have attracted great attention. In video delivery on hybrid broadcasting systems, clients can receive data both from communication systems and broadcasting systems. In conventional methods, the clients that have much data receive data from communication systems. This lengthens the data reception time for the clients that do not have much data and causes longer...
Wireless multimedia communications such as Video Transfer over Radio Interface (VToRI) is widely acknowledged as one of the key, emerging applications for wireless networks. They are becoming popular and are major revenue earners for wireless communication providers. As a service with real-time requirement, VToRI requires a low delivering delay under the constraint of bandwidth. Larger bandwidth and...
When a passenger in a vehicle wants to watch video during movement, he may request video through cellular network, e.g., 3G or 3.5G network. However, due to the characteristics of vehicular networks, the limited bandwidth of 3G/3.5G network is not enough to support high resolution or high video quality. In order to improve the quality of video playback, this vehicle, which is defined as requester...
Mobile users are increasingly demanding multimedia content created specifically or at least tailored to cater for their needs and preferences. The limitations of current Internet challenge a lot the design of such sessions, and require embedding innovations beyond standards to achieve rich networking. In this scope, the Context Casting (C-CAST) project designed a context-sensitive network architecture...
If network congestion occurs, packets cannot be delivered timely, the data rate decreases significantly and the required level of QoS cannot be achieved for all nodes. Especially in Home Area Networks (HANs) with limited uplink bandwidth for internet access, congestion is a major problem. Different approaches for congestion aware link sharing and QoS provisioning exist. Also the Distributed Fair Congestion...
We discuss the current problem of spectrum shortage and the idea of a viable solution employing indoor optical wireless links creating small high-bandwidth islands for each user effectively helping to combat this spectrum shortage [1].
With the advances in mobile technologies, smart mobile computing devices have become increasingly affordable and powerful, leading to a significant growth in both the number of advanced mobile users and their bandwidth demands. Moreover multimedia streaming to these high-end mobile devices has become widespread. However, multimedia applications are known to be resource-hungry and in order to cope...
A fast learning neural network based scheduling system is presented to predict the frames on a single and multi-user MPEG-4 traffic and to distribute the bandwidth accordingly. MPEG-4 video stream traffic from various sources is used to evaluate the capability of this algorithm. A Fast learning Neural network algorithm also termed as Cartesian Genetic Programming Evolved Artificial Neural Network...
The nature of operation of Thin Client computing makes their performance to be affected by both the quality of the network and the terminals. For the past few years, there are few analyses on the performance of Thin Clients that can produce reliable, valid, and up-to-date results collected in a well designed and evaluated experiment based research. This paper analyses the performance of Thin Clients...
Rate control for multimedia streaming has been the subject of many recent research activities. In this paper we propose a simple, but optimal technique for rate control that does not require the knowledge of the type of the multimedia data, but only needs that every packet is labeled with a “priority value” that represents the relative importance of the packet. This makes it possible to implement...
When dealing with multimedia delivery, scalability, efficiency and Quality of Service (QoS) are challenging features for today's networks. Overlay networks can compensate for the lack of control over the network routers, but for real-world applications overlay network performance is an issue. This paper presents an efficient solution for software implementation of overlay network nodes. A new, advanced...
Our previous research has successfully developed Virtual Class Box prototype that uses multimedia conference technology to provide digital learning service. This technology however faces a limitation in coverage and distance because the system needs a dedicated wireless infrastructure. Our recent research is to break this limitation by proposing augmented reality concept and design to provide digital...
This key-note presentation begins with the introduction of critical technologies driving smartphone and tablet markets such as increasingly demanding CPU performance, wireless and wired connectivity requirements, memory capacity and bandwidth, display/multimedia performance and longer usage time - which requires sophisticated low power design techniques. It is demonstrated that performance and cost...
The use of multimedia applications is increasing every year. These trends include the deployment using wireless local area network (WLAN) that allows users to access various services. The most significant thing in the use of wireless networks is the delay, collusion, attenuation and interference. In addition, it is difficult to provide quality of service (QoS) in WLAN as the network capacity also...
Recently, the Internet has become a popular platform for the delivery of multimedia content. However, its best effort delivery approach is ill-suited to guarantee the stringent Quality of Service (QoS) requirements of many existing multimedia services, which results in a significant reduction of the Quality of Experience. This paper presents a solution to these problems, in the form of a framework...
The Internet is rapidly evolving towards a multimedia service delivery platform. However, existing Internet-based content delivery approaches have several disadvantages, such as the lack of Quality of Service (QoS) guarantees. Future Internet research has presented several promising ideas to solve the issues related to the current Internet, such as federations across network domains and end-to-end...
Wireless mesh networks (WMNs) have become immensely popular these days. In order to satisfy user service requirements, multimedia applications need quality of service (QoS) support. Since the mesh routers are usually stationary in WMNs, a better performance is expected in WMNs as compared to ad hoc networks. But sustaining QoS in wireless mesh networks still remains a challenging task. A fundamental...
This paper presents an adaptive rate control scheme for streaming-based content sharing service which delivers multimedia contents from a user device to another device or seamlessly redirect streaming service across heterogeneous user devices. In proposed scheme, a streaming server adjusts video quality level according to the network and client status. Our scheme is different from other rate control...
The staircase scheme is one of the important broadcasting schemes. It however does not provide the video data to all users on time. This problem has been overcome in the conservative staircase scheme at the cost of bandwidth. The number of segments in the conservative staircase scheme is less and hence the segment size is large, which signifies the user's waiting time. Thus, the conservative staircase...
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