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Although, it was shown that NC is a promising technique to improve the throughput; especially for multicast environment; it also bears negative side-effects (e.g., high decoding delay). Since streaming video are usually subject to strict delay constraints, high decoding delay must be resolved to enhance the performance of the NC schemes. To overcome this issue, this paper presents a new scheme named...
The growing of the internet use is proportional with the growing of IP address needs, but the increasing of the IP use is not equal with the number of available IPv4. Then, IPv6 was developed as a solution to overcome the limited amount of IPv4 address. Readiness of various aspects ranging from infrastructure to a service provider is required to implement IPv6. In order to improve the quality of IPv6...
The recent trends in deploying multimedia systems, such as education, telemedicine, military and space endeavors is to deliver a smooth and uninterruptable video along with audio is a challenging task nowadays. The operators started using standard servers in the cloud. The internet based computing which provides more on-demand computing resources over the internet. Video Transcoding the method adapted...
ITU-T H.264/MPEG-4 Scalable Video Coding (H.264/SVC) is one of popular video coding standard after H.264/MPEG-4 Advanced Video Coding (H.264/AVC) which was created by Joint Video Team (JVT) between Video Coding Expert Group (VCEG) ITU-T and Moving Picture Expert Group (MPEG) ISO/IEC. This standard allows video coding using single layer or more ones to provide the scalability of the coded video.
This paper will discuss about transmission of multimedia content in limited capacity network (up to 5 Mbps), especially to study about the impact of background traffic towards multimedia content delivery quality in a limited capacity network. Observation methods proposed in the study include measurement of limited capacity network, background traffic modeling, and simulating the network to observe...
Wireless Multimedia Sensor Networks (WMSNS) are composed of a number of sensors which usually the most important data generated by them are video data. According to massive amounts of data, congestion control is essential for quality preservation of the video data. Quality of video data depends on low latency and high reliability. In this paper, an approach for congestion control is proposed. In the...
H.264/SVC codec provides spatial, temporal and quality scalabilities of the video information and MIMO systems offer multiple spatial sub channels to transmit different video layers. In this paper, we propose a joint source-channel coding scheme for the delivery of scalable video over Multi-Input-Multi-Output (MIMO) wireless systems. To improve the power efficiency of the MIMO system, we investigate...
Content distribution schemes for Video on Demand (VoD) systems, based on the peer-to-peer (P2P) technology, have attracted more and more attention. Recently, people mainly focus on the latency performance, security, interaction, scalability, and so on. We propose a new network topology model — Similarity Crossed Cube(S-CQ for short), which combines with the feature of crossed cube and establishes...
Wireless Mesh Network (WMN) is a promising wireless technology for several emerging and commercially interesting applications. It is a multi-hop wireless access network where nodes can act both as a host as well as a router. The proposed work focuses on architecture of hybrid mesh network such that gateway routers are used for accessing the internal or external network. The mesh router has been divided...
Delay has been found as one of the most crucial factors determining the Quality of Experience (QoE) in synchronous video-mediated communication. The effect has been extensively studied for dyadic conversations and recently the study of small group communications has become the focus of the research community. Contrary to dyads, in which the delay is symmetrically perceived, this is not the case for...
IEEE 802.11n WLAN was mainly developed to support a high data transmission rate toward 600Mbps based on the aggregation scheme that accumulates several sub-frames to transmit them into a larger frame. This concept reduces overheads and increases efficiency and throughput. Nevertheless, it cannot provide QoS satisfaction for delay sensitive application since it badly affects the delay. To outperform...
Low latency is essential for videoconferencing applications such as presence and collaboration between remote participants. In modern videoconferencing systems, the Selective Forwarding Unit (SFU) has the role of transparently duplicating and forwarding media streams between participants, hence it must be able to process large volumes of incoming packets at very high rates. SFU performance is heavily...
This paper proposes a QoE (Quality of Experience) assessment model which can estimate voice and video quality. Based on the proposed model, speech or video quality is calculated with regard to policies applied for packet processing by routers and to the level of total network utilization. The contribution of this paper lies in designing a new computational model capable of predicting the quality of...
Bandwidth is one of the characteristics that is used to measure network performance. In this paper, we present a Unicast Bandwidth Efficiency Routing Algorithm (UBERA) for mobile devices that are streaming video contents from a video server. The algorithm can adapt to different number of mobile devices with different level of mobility and different location. Routing decisions are based on the availability...
Video transmission over 802.11 wireless networks poses many challenges. Bandwidth demands and timing constraints are two major challenges for real time video transmission over wireless. To increase network throughput as well as overall network capacity, the use of cross layer design approach is required. One of such design approaches includes physical (PHY) and medium access control (MAC) layers considerations...
This paper presents the development of next generation e-learning systems for real-time video, voice conferencing and streaming technology over secure socket layer (SSL) IPv6 in campus environment. Development of the V2oIP e-learning systems has contributed a significant value to distance learning. The aim of this study is to design real time interactive learning systems with security over SSL IPv6...
This paper presents, through simulation experiments, a performance study of both IEEE 802.11n aggregation methods: A-MPDU (Aggregated MAC Protocol Data Unit) and A-MSDU (Aggregated MAC Service Data Unit), considering scenarios of video streaming. The objectives of this article are: (i) investigate the quality of service achieved, (ii) show which of the two methods of aggregation (A-MPDU or A-MSDU)...
With rapid development of microelectronics and low-cost cost multimedia hardware, Wireless Sensor Networks (WSNs) have started to evolve into Wireless Multimedia Sensor Networks (WMSNs), where the emphasis is given on acquisition, processing and transmission of multimedia content through WSN. While the idea of multimedia sensor networks has been existing for some time, very little research is performed...
Network performance has been the subject of much research over the past decades. However, the impact of performance on a network's users is much less understood from a scientific standpoint. This gap in our knowledge is particularly stark since the primary role of real-world network performance is to increase user satisfaction, and encourage user behaviors that lead to greater monetization. As an...
Real-time stream mining such as surveillance and personal health monitoring is computation-intensive and prohibitive for mobile devices due to the hardware/computation constraints. To satisfy the growing demand for stream mining in mobile networks, we propose to employ a cloud-based stream mining system in which the mobile devices send via wireless links unclassified media streams to the cloud for...
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