936 research outputs found
The Evolution of the Sofa - TV in the New Digital Scenario
The traditional television is now at a turning point because the introduction of digital technology has changed the competitive context: it has modified the bargain power of the traditional players by offering new opportunities to the new entrants and imposing new strategies to the existing ones. This paper, basing on 32 case studies and the census of Sat TV, DTT and IPTV offerings, aims at describing the current state of channel offerings, individualizing the principal players and identifying their strategies, thus allowing us to give a few predictions as to the possible future changes in the industry. The analysis will have a general applicability, as the considerations made are not particularly country-specific, although performed within the Italian context, one of the most advanced in the development of digital TV platforms.digital technology, competitive, strategies
Internet protocol television (IPTV): The Killer application for the next-generation internet
Internet Protocol Television (IPTV) will be the killer application for the next-generation Internet and will provide exciting new revenue opportunities for service providers. However, to deploy IPTV services with a full quality of service (QoS) guarantee, many underlying technologies must be further studied. This article serves as a survey of IPTV services and the underlying technologies. Technical challenges also are identified
Performance Study of Mobile TV over Mobile WiMAX Considering Different Modulation and Coding Techniques
With the advent of the wide-spread use of smart phones, video streaming over
mobile wireless networks has suddenly taken a huge surge in recent years.
Considering its enormous potential, mobile WiMAX is emerging as a viable
technology for mobile TV which is expected to become of key importance in the
future of mobile indus- try. In this paper, a simulation performance study of
Mobile TV over mobile WiMAX is conducted with different types of adaptive
modulation and coding taking into account key system and environment parameters
which include the variation in the speed of the mobile, path-loss, scheduling
service classes with the fixed type of mod- ulations. Our simulation has been
conducted using OPNET simulation. Simulation results show that dynamic
adaptation of modulation and coding schemes based onchannel conditions can
offer considerably more en- hanced QoS and at the same time reduce the overall
bandwidthof the system.Comment: 12 pages, 9 figures. arXiv admin note: substantial text overlap with
arXiv:1312.7442; and text overlap with arXiv:1005.0976 by other author
A utility-based priority scheduling scheme for multimedia delivery over LTE networks
With the mobile networks migrating towards LTE-Advanced and all-IP networks, people expect to connect to the Internet anytime, anywhere and from any IP-connected device. Moreover, nowadays people tend to spend much of their time consuming multimedia content from various devices with heterogeneous characteristics (e.g., TV screen, laptop, tablet, smartphone, etc.). In order to support uninterrupted, continuous, and smooth video streaming with reduced delay, jitter, and packet loss to their customers, network operators must be able to differentiate between their offerings according to device characteristics, including screen resolution. This paper proposes a novel Utility-based Priority Scheduling (UPS) algorithm which considers device differentiation when supporting high quality delivery of multimedia services over LTE networks. The priority decision is based on device classification, mobile device energy consumption and multimedia stream tolerance to packet loss ratio. Simulation results demonstrate the benefits of the proposed priority-based scheduling algorithm in comparison with two classic approaches
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