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Unmanned aerial vehicles (UAVs) have gained interest in different areas due to their versatility and multiple applications. In this case study, a wireless communication system is analyzed between the UAV and its earth station, for the transmission of thermal images in real time and application in fire control. Considering different types of UAVs capable of transporting a high performance thermal camera,...
Modern internet traffic is heavily composed of some form of video communication. In addition, video streaming is slowly replacing regular phone connections. Given that most video transport utilizes Video over Hypertext Transfer Protocol/Transmission Control Protocol (HTTP/TCP), it is important to understand TCP performance in transporting video streams. Recently, multipath transport protocols have...
The lack of adequate support for multicast hinders the ability of WiFi to deliver high quality video in crowded areas with large number of users. In our recent papers, we presented techniques for low-overhead feedback collection and rate adaptation for WiFi multicast. In this demo, we present a platform for evaluating video delivery over multicast using these techniques. The platform does not require...
Research and development on video streaming over vehicular ad hoc networks (VANETs) have expanded rapidly in the last few years. In order to improve road safety and to satisfy road users requirements, video streaming has been proposed to disseminate continuously, an accurate video data, concerning traffic circumstance, travel information, divertissement, etc. High quality video streaming in vehicular...
Video streaming applications over wireless networks have been turned out to be immensely popular in recent times. In this thesis, we study the buffering schemes streaming in heterogeneous wireless networks for the VBR video. An analytical framework is presented to derive the number of expected jitters and buffering delay in average. Through experimenting with a wide range of buffering schemes, we...
This paper proposed a video frame skipping and interpolation technique (VFS-I) for streaming video. This technique is divided into main sections: transmitter and receiver. The transmitter is employed FSM (Frame Skipping Mechanism) to drop/skip similar frames from video sequence to reduce the amount of frames that need to be transferred over the network. This method specified frames to-be-kipped according...
The high quality and low delay video streaming is desired for all users. Especially the playback delay is much more undesirable since it is easily perceived by human eyes, and it consists of decoding delay and transfer delay. In this paper we use High Efficiency Video Coding (HEVC) with tiles to achieve parallel encoding/transmission/decoding, and propose to use a novel adaptive tile boundary (ATB)...
To understand better what happens when video streaming takes place, this paper introduces a framework to simulate a real-time video streaming over wireless channels. The system is divided into many modules and is simulated with different tools. DUMMYNET is used for the network simulator while FFMPEG is for coder/encoder and sender/receiver module. The video quality is measured by spatial (SSIM and...
In this paper, we propose a method to stream a high quality video with low latency and high bandwidth efficiency. Our method, which is similar to multicast, repeats copying packets in the network using a distinguished address for multiple receivers, so that it can minimize the latency and the bandwidth, and hence is suited for stream a video. This method does not require a relay server. We discuss...
The aim of our work is to develop an application that runs on a mobile platform, and performs live streaming from the camera of a phone to other phones and PCs. The application should be able to adapt the quality of the video according to external factors like the strength of the network connection.
To ensure the robust delivery of video streams, a network must emit additional data that will replace the missing ones in case of a failure of some server. One key issue is then to keep this so-called redundancy as low as possible while still ensuring some quality of service. In this paper, we provide protectionoriented models to compute the minimum level of redundancy ensuring that every customer...
The tremendous growth of video content over the Internet and evolution towards more personalized video applications has led to a need for a network and service infrastructure better suited to today's content and mobility needs. Quality of Experience (QoE) management is one of the major challenges for video delivery given the limited bandwidth for wireless access network causing video packet drops...
This paper introduces the basic concepts of real time video streaming using GStreamer through an open source low cost platform — GNU Radio. The GStreamer serves as a base to create many types of multimedia applications such as video editors, streaming media players and media broadcasters. It can help educators to face the challenges of different learning styles and enhance the way in which students...
The mobile device usages in last decade grown enormously due to the variety of applications with video based contents. The video delivery through the internet is highly focused because of heavy demands from the mobile users. We take various techniques involved in video streaming in wireless networks. The different constraints and different methods have been studied with their merits and demerits and...
This paper proposes a cross-layer control mechanism to stream efficiently scalable videos to mobile receivers. Its goal is to maximize the quality of the received video while accounting for the variations of the characteristics of the transmitted content and of the channel. The control problem is cast in the framework of Markov Decision Processes. The optimal actions to apply to the system are learned...
Multiple Description with Forward Error Correction (MD-FEC) coding provides the flexibility, easy adaptivity and distortion-rate optimality that are desirable for delivering streaming video in a network environment with time-varying bandwidth fluctuations and random packet losses. In this paper, we consider the issue of how diverse receivers of a video stream should be grouped — where each group receives...
The use of multiple Access Points (APs) with one AP placed at the middle of a coverage area and the remaining placed at the edge may reduce the Packet Error Rate (PER) experienced by a group of multicast receivers. This paper shows that Spatial Diversity can augment the channel quality experienced especially by those nodes which are located farther from the Master AP, i.e. the AP at the middle, however...
Datagram Congestion Control Protocol (DCCP) is an unreliable transport layer protocol with a congestion control mechanism used for multimedia streaming. In order to use multiple network interfaces to transmit streaming data smoothly, a Multi-Path Datagram Congestion Control Protocol (MP-DCCP) is proposed and presented in this paper. Video streaming transmission through multi-path faces three problems:...
Irrecoverable data loss may be unavoidable for real-time video communication over common best-effort networks. Rather than always display impaired pictures or always “freeze” the last good picture, it is preferable to transmit additional hints to support selective freezing of heavily damaged pictures only. In particular, errors in impaired pictures tend to be localized, and often manifest themselves...
Network coding is a new technique in the field of information theory and coding theory. This emerging technique offers great benefits in the communication networks such as increased throughput and energy savings. In this paper, we evaluate a multi-source scheme using network coding for video multicast scenarios. In this scheme, the source nodes encode the video packets, while the intermediate nodes...
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