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The high demand of bandwidth from multimedia applications, specially video applications which consume the great majority of the Internet bandwidth, has caused a challenge for service providers and network operators. On the one hand, the allocation of bandwidth in a fair manner for multimedia users is necessary, so that the total utility of all users is maximized for higher quality of experience. On...
As the Quality of Experience of video streaming can be greatly affected by parameters such as jitter, throughput, packet loss and delay, it is of great importance to assess the consequences low Quality of Service. Video artifacts are errors that can be displayed when multimedia streaming faces transmission difficulties. Blocking, ringing, motion compensation mismatch or false borders are some of the...
Most of the recent set-top boxes for digital video broadcasting connect to the Internet. They can receive data from broadcasting systems and from the Internet. Such hybrid broadcasting environments, in which clients can receive data from both broadcasting systems and communications systems, are suitable for streaming delivery since they complement their demerits for streaming delivery with each other...
This paper is an up-to-date short overview of the QoS for Satellite IP networks. Some definitions, parameters and requirements for QoS are given. IP QoS Architectures are presented and various contributions to end-to-end QoS at each layer are included. DVB-RCS and evolution to standard DVB-S2 - RCS to support emerging Internet services via satellite is also briefly approached. Possible integration...
In this paper, we consider the heterogeneous network, where a macro base station equipped with massive multiple input multiple output (MIMO) antennas provides the wireless backhaul for small cell base stations (SBSs). In this scenario, because the capacity of the small cell is limited by the wireless link with the macro base station, the unbalanced user distribution among base stations might significantly...
Large online video sharing systems are becoming increasingly prevalent among the general public recently. A better understanding of their service usages is crucial for allocating the network resources and adjusting the service design. In this paper, we focus on a leading online video sharing system in China, namely Youku. We collected over 12 billion traffic traces from the network operator, and crawled...
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 replication and dissemination of multimedia data become increasingly convenient and efficient, so a lot of redundant multimedia data, especially image files, have been generated and stored on the Internet. Therefore, it is necessary to perform deduplication of images. However, the existing deduplication methods of regular files are hash-based, which cannot be applied to the deduplication of images...
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...
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...
Video streaming and computer games are among the most popular and highest bandwidth consuming media in the Internet. Video contents consume around 70% of the total bandwidth usage in the Internet today. Advancements in media generation tools, high processing power, and high speed connectivity have enabled generation of live, interactive, multi-view media generation. Cognitive assisted and online multi-player...
Nowadays, search engines are prominent tools, which are required by users, for finding information in web. Multimedia search engines are of special importance due to two different reasons; 1) attractiveness of multimedia contents and 2) growing rate of the creation and online dissemination of such contents. In this paper every effort is made to analyze and recognize the propensities of the users of...
The most efficient way to solve large scale videostreaming problem is periodic broadcasting for popular videos.Early studies mainly focus on reducing client¡¯s waiting timeand buffer demand. Later, researchers focused on the problemof heterogeneity among clients¡¯ reception bandwidths.Solutions can be categorized in two types: ReceptionBandwidth Adaptable (RBA)...
In order to enhance the user experience, it is necessary to reduce the waiting time for each video. It is obvious that the waiting time decreases as the number of channels increases when other conditions keep the same. In this paper, an algorithm using binary search and combining broadcasting with unicast is proposed to minimize the maximum waiting time based on this property. Furthermore, a recommendation...
The broadcasting industry has recently begun to adopt statistical multiplexing based network platform in their workflow to support professional live audio/video (AV) transmission instead of the Time Division Multiplexing (TDM) based system. These audio-over-packet switched systems require a carefully designed and managed network to ensure key quality measures of the real-time (RT) media, such as low...
Mobile web browsing is becoming very popular with the recent advances in the satellite and wireless networks, and the growing popularity of the World Wide Web. The mobile users generally have limited resources, such as low bandwidth and low-resolution terminal, compared to the conventional desktop users. It is important to develop techniques that will enable the mobile users to access the web efficiently...
Software-defined networking (SDN) enables network subscribers to negotiate QoS parameters in a on-demand basis. On the other hand, peak-time congestion accompanying the fast-growing traffic in recent years forces Internet service provider (ISP) to put forward a new pricing scheme by taking into account when a user uses Internet in addition to how much a user uses Internet. In this paper, we study...
In wireless multimedia sensor networks (WMSNs), multimedia contents from remote areas are captured by camera sensors (CSs) and sent to data center via cluster heads (CHs) and base stations (BSs) for the purpose of monitoring. The problem in WMSNs is that enabling multimedia streaming, e.g., video streaming, demands high quality and consumes considerable bandwidth and energy resources, meanwhile, the...
Periodic broadcasting has achieved prominent performance in VoD (Video on Demand) service in wired network. However, the development of wireless VoD service still has gone on hard and slowly in comparison to the rapid growth of mobile video service. In this paper, we propose a scalable video streaming method HQOBA (Heterogeneous Quality-Oriented Bandwidth Allocation) to address the problems in wireless...
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