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The new DVB-T2 standard was specifically designed to allow the reuse of DVB-T infrastructure if required. This paper presents measurement results that verify the correct performance of a commercial DVB Power Amplifier with DVB-T2 waveforms. Furthermore, the paper includes configuration guidelines and performance evaluation of the Tone Reservation PAPR reduction algorithm included in the DVB-T2 standard...
This paper presents the topology of a multimedia tourism service that targets mobile devices with broadband and broadcast access capabilities. The solution adopted relies on existing mobile TV standards, but introduces features that enable the provision of generic multimedia services on top of hybrid mobile networks.
Nowadays, many multimedia cluster-to-cluster applications exist, such as 3D tele-immersion (3DTI), computer-supported collaborative workspaces (CSCWs), distributed multimedia presentations (DMP).... All these applications have sophisticated data transport requirements due to the use of multiple, semantically related flows of information. A synchronization mechanism must be used to synchronize the...
This paper presents the architecture of a Hybrid Broadband Broadcast TestBed deployed in Gavle, Sweden, to conduct end user trials with Interactive TV Services. The platform offers an environment for the evaluation of Interactive TV services, technology and program formats for television.
In optical burst switching (OBS) networks one of the most challenging problems is to provide service differentiation. The lack of buffering in the intermediate nodes, makes QoS provisioning in OBS networks a difficult problem to address. In this work, we propose a scheduling algorithm that supports QoS based on preemptions, which are controlled by a novel preemption policy. Our claims are validated...
This paper describes the main challenges of implementing a multimedia on demand system (TetraMoD) for emergency scenarios. The objective of this system is to offer a complete solution for providing multimedia services (video on demand and reliability file transfer) to a rescue team in an emergency situation. This multimedia system will improve the traditional emergency communications. We propose to...
Optical burst switching (OBS) has been proposed to be a technology for implementing the next generation optical Internet. In this architecture, burst assembly algorithms have an important influence in the traffic pattern that characterizes this sort of optical networks. On the other hand, traffic coming from new applications (such as video on demand, Voice over IP, online gaming or Grid services)...
Optical burst switching (OBS) has been proposed to be a technology for implementing the next generation optical Internet. In this architecture, burst assembly algorithms have an important influence in the pattern traffic that characteristic this sort of optical networks. On the other hand, traffic coming from new applications (such as video on demand, Voice over IP, online gaming or Grid computing)...
The transmission of encoded video streams over heterogeneous networks, characterized by congestion losses in wired links and high bit error rate in the wireless channel, is under consideration in this paper. First of all, it is necessary to make a distinction between the different kinds of losses to achieve a high channel utilization. Then, when dealing with wireless losses, the robustness of the...
In this paper an analysis and comparison of multimedia synchronisation algorithms is presented. After presenting the three types of multimedia synchronisation (intra-stream, inter-stream and group synchronisation), only inter-stream and group synchronisation algorithms are considered. The main synchronisation techniques included in most of the analysed algorithms have also been classified. Finally,...
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