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Online video sharing and social networking are cross-pollinating rapidly in today's Internet: Online social network users are sharing more and more media contents among each other, while online video sharing sites are leveraging social connections among users to promote their videos. An intriguing development as it is, the operational challenge in previous video sharing systems persists, em i.e.,...
Technology clients expect with the release of a new device model that the device is more powerful and more energy efficient than its predecessor. There are many profiling tools aimed at profiling the energy efficiency of different platforms in order to provide consumers fair comparison of the energy efficiency of available platforms. Since improving the power consumption of devices is no longer the...
With the popularity of video streaming on the Internet an entirely new type of media player has been created called the adaptive video player that dynamically adjusts video quality depending on available network bandwidth. When combined with cloud computing this new way of serving media has the potential to change the video streaming landscape by allowing content to be streamed reliably from anywhere...
We consider several key questions in the design of a real time video quality assessment system. How frequently can we generate subjective video quality ratings with some degree of accuracy? How often should we sample the data? How do we weigh the need to consolidate data collection (arguing for fewer, less frequent data points) with the need to monitor video quality in real time (arguing for more...
Media streaming applications have recently attracted large number of users in the Internet. With the advent of these bandwidth-intensive applications, it is difficult to provide streaming distribution with guaranteed QoS relying only on central resources at the content provider. Cloud computing offers an elastic infrastructure that media content providers (e.g., VoD provider) can use to obtain resources...
Over the last decades, various kinds of Internet enabled devices have been developed. DLNA (Digital Living Network Alliance) has provided standard guidelines to improve the interoperability of DLNA-capable devices and to enhance the usability of digital contents through DLNA Certified devices. However, for several reasons, the transmission for media sharing between DLNA devices is still not seamless...
This paper provides an overview on the challenges of mobile video streaming focusing on overload situations, variable bandwidth and power consumption issues. Dynamic Adaptive Streaming over HTTP (DASH) is introduced as an enabler to address a significant portion of these challenges. The applicability of the formats to 3G and 4G unicast distribution is provided. Also the applicability of DASH formats...
Recently, dynamic adaptive HTTP streaming has been widely used for video content delivery over Internet. However, it is still a challenge how to switch video bitrate under time-varying bandwidth. In this paper, we propose a novel control-theoretic approach to adapt video segments in dynamic HTTP streaming. The rate control is based on a sink-buffer, which has an overflow-threshold and an underflow-threshold...
Multipath transmission is the important way to increase the efficiency and reliability of network transmission. Along with the development of overlay network, multi-homed host et al, multipath transmission control becomes the hot spot of network transmission technology research gradually. As the base of path choice and switching in multipath transmission, real-time evaluation of path QoS is a key...
The diversity of session control protocol, media processing mechanism and channel condition makes it difficult to have universal communication in heterogeneous networks. In this paper we propose a service-oriented communication system which can support different types of services, e.g., session control service, media processing service and network adaptation service. The architecture of the proposed...
Network coding is a new data transmission method which is different from the traditional storage and forwarding routing technology. By using network coding, it can improve the throughput of the media multicast network. This paper study the layer rate allocation optimization problem based on network coding for media multicast network. By optimal allocating layer rate, the total rate of all receiving...
Display Cluster is an interactive visualization environment for cluster-driven tiled displays. It provides a dynamic, desktop-like windowing system with built-in media viewing capability that supports ultra high-resolution imagery and video content and streaming that allows arbitrary applications from remote sources (such as laptops or remote visualization machines) to be shown. This support extends...
Peer-to-peer networks such as Bit Torrent swarms have gained popularity on Internet. One of the fundamental underlying mechanisms is to foster and enforce peer cooperativeness. As for fairly exchanging Bit Torrent chunks, peers may resort to encrypted chunk exchanges yet at the cost of delayed availability of plain chunks. In response, this paper presents a chunk encryption scheme for exchanging chunks...
Adaptive HTTP streaming has become a new trend to support adaptivity in video delivery. A HTTP streaming client needs to estimate exactly resource availability and resource demand. In this paper, we focus on the most important resource which is bandwidth. To this end, our proposed streaming approach consists of 1) throughput prediction and 2) content bitrate prediction. The experiments show that our...
Real time media distribution services such as live streaming and video on demand (VoD) have gained great popularity among users. Specifically, it has been noted that VoD generates a respectable percentage of the internet traffic. On the other hand major VoD service providers (i.e. youtube) are not scalable, and thus not profitable due to bandwidth costs. Additionally, their servers consume a vast...
Small playback lag in live streaming is important for time-critical and interactive applications such as live stock, market updates, sports and remote education. In this paper, we present Elite addresses the playback lag problem in peer-assisted live streaming systems. Instead of deploying a large initial offset to all the users, Elite seeks the possibility of initializing users with layered proportional...
The resource-updating period behavior of mainstream HTTP cache server implementations is suboptimal in that these cache servers send redundant requests to the upstream server if clients request a file that is already being updated from the upstream server. Although this is a corner case issue in previous web applications, its ramifications is significant in live HTTP streaming systems because it will...
Traditional peer-to-peer live streaming systems usually have one specific streaming rate for one single channel. However, with the terminals diversifying, especially smart mobile phones bursting, the desire for multi-rates from one single channel topology of P2P live streaming becomes urgent, while considering that the network environments and topologies always change momentarily. High rate stream...
In a P2P media streaming system, a centralized tracker server is always used to maintain the topology. However, sometimes the server becomes overloaded when too many clients are coming. Then, the response time is too long because of many frequent VCR operations and the tracker server cannot support large-scale users' requests. In this paper, a distributed tracker organization is designed to solve...
In recent years, IPTV service has been focused on and invested heavily by many service providers. Among the various IPTV service, VoD (Video on Demand) service is expected to be one of the most popular services. Currently, most of service providers are trying to provide VoD service by locating proxy nearby end-users because it is hard for a single server to cover all the requests from the entire service...
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