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Recently, HTTP-based adaptive video streaming has been widely adopted in the Internet. Up to now, HTTP-based adaptive video streaming is standardized as Dynamic Adaptive Streaming over HTTP (DASH), where a client-side video player can dynamically pick the bitrate level according to the perceived network conditions. Actually, not only the available bandwidth is varying, but also the chunk sizes in...
360 degree video compression and delivery is one of the key components of virtual reality (VR) applications. In such applications, the users may freely control and navigate the captured 3D environment from any viewing direction. Given that only a small portion of the entire video is watched at any time, fetching the entire 360 degree raw video is therefore unnecessary and bandwidth-consuming. In this...
Visual data are rich, which have opened vast analytics opportunities and been widely used in many applications. However, the demanding requirements of computational resources and bandwidth have prevented the data from being useful in an economically efficient manner. A visual fog paradigm is needed for efficient processing of continuous video streams by collaboratively using things in the Internet...
Internet of Things (IoT) systems produce great amount of data, but usually have insufficient resources to process them in the edge. Several time-critical IoT scenarios have emerged and created a challenge of supporting low latency applications. At the same time cloud computing became a success in delivering computing as a service at affordable price with great scalability and high reliability. We...
The Dynamic Adaptive Streaming over HTTP (DASH) is specified to cope with the changing network conditions and provide an adaptive bit-rate HTTP-based streaming solution. While there have been many researches of rate adaptation algorithms on adaptive HTTP streaming, much of the work is focused on Video on Demand (VoD) service — which is not same as live streaming. It is generally preferred to minimize...
In Video-on-Demand (VOD) system, it is very important to allocate channels efficiently, so that the most people can view the video immediately, rather than leave the system because of long waiting time. In this paper, an algorithm based on dynamic programming is proposed to maximize the expectation of served users by combining broadcasting with batching. Furthermore, a recommended system is applied...
The strain imposed by the bandwidth demands of multimedia applications on wired and wireless networks calls for efficient novel solutions to the problem of network resource allocation, to avoid significant packet losses. In this letter, we focus on a large variety of MPEG-4, H.264 and H.265-encoded video traces. We use the metaheuristic technique of Simulated Annealing to predict the size of B-frames,...
Video streaming takes the lion's share of network bandwidth, with a trend that will likely increase in the future. In the recent years, dynamic adaptive streaming has been developed to offer a smooth video stream with variable quality, depending on the performance of the network connection. At present, several content providers like Netflix, YouTube and Hulu, to name a few, already offer videos that...
HTTP Adaptive Streaming is a successful and largely adopted content delivery technology. Yet poor bandwidth prediction, notably in mobile networks, may cause bit-rate oscillations, increased segment delivery delays, video freezes, and may thus negatively impact the end user quality of experience. To address this issue, we propose to exploit the stream prioritization and termination features of the...
Thanks to the abundant available bandwidth and multiple paths on wide-area links that interconnect datacenters on major cloud platforms, it is conceivable that bandwidth-intensive applications may improve their performance by relaying their traffic through such an inter-datacenter network. We propose Stemflow, a new systems framework that provides Inter-Datacenter Overlay as a Service. It is provided...
Increasing over-the-top video consumption endangers the sustainability of content delivery over the Internet. Internet Service Providers (ISP) face difficulties in competing on value-added services with content providers and Content Delivery Network (CDN) operators. In this respect, we propose a new model for the collaboration between content delivery stakeholders, so that CDN operators can deploy...
The growing demand for video streaming is straining the Internet, and mandating a fundamental change in future networking paradigms. Current advancements in Information-centric Networks (ICN) promise a novel approach to intrinsically handling content dissemination, caching and retrieval. While streaming technologies are converging towards Dynamic Adaptive Streaming (DAS), in-network caching in ICN...
HTTP Adaptive Streaming (HAS) is a widely used video streaming technology that suffers from a degradation of user's Quality of Experience (QoE) and network's Quality of Service (QoS) when many HAS players are sharing the same bottleneck link and competing for bandwidth. The two major factors of this degradation are: the large OFF period of HAS, which causes false bandwidth estimations, and the TCP...
Periodic broadcasting is the most efficient strategy to distribute popular video streams. In the past decade, many periodic broadcasting schemes were presented to reduce client's buffer usage and client's waiting time. After that, people focused on the problem of heterogeneous receiving. A recently proposed broadcasting scheme named Delay Receiving (DeRe) solves this problem by ensuring low waiting...
As 4K UHD market constantly increases, the development of 4K UHD multimedia devices is becoming more important and profitable. Important aspect in 4K multimedia devices development and deployment is testing which can be done using black-box approach. In this paper, two main challenges regarding 4K UHD device black-box testing are identified and explored, namely problem of raw 4K UHD video transmission...
In media production companies, exchanging large media files is daily business. Due to the predictable nature of network transfers in the media production industry, timeslot-based advance bandwidth reservation results in higher bandwidth utilization and improved network performance. Timeslot-based advance reservation can be based on flexible or fixed timeslot sizes. As the flexible approach is highly...
Transmission of high quality video over wireless networks is increasingly important as users consume more video on mobile devices. Improvement in display technologies will drive demand for higher quality experiences such as multiview video, at the expense of greater bandwidth requirements. The viewing experience can be disrupted while streaming video due to packet loss caused by network congestion...
Aggregating multiple access interfaces of a client is a promising way to satisfy the high bandwidth demand by high-definition video streaming services. However, how to efficiently use such aggregated bandwidth to improve the reliability of timely fetching video contents needs to be further studied. In this paper, we propose a partial overlapping chunk based dual-path transmission scheme, which uses...
Among the mobile applications contributing to the surging Internet traffic, video applications are some of the biggest contributors. Most of these video applications use HTTP/HTTPS tunneling making it difficult to apply port based or packet data based identification of flows. This makes it challenging for network operators to enforce bandwidth regulation policies for app based service differentiation...
This paper details a measurement study on the impact of different HTTP-based application layer protocols, namely HTTP/1, HTTP/2 and QUIC, on video streaming performance. In this context we evaluate the influence on the initial delay until video playout is started using the live version of the YouTube platform. Furthermore, we evaluate how different network parameters, i.e. bandwidth, RTTs and packet...
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