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Congestion control is vital in the streaming of a video sequence or clip, as network traffic varies unpredictably requiring constant adjustment of the transmission rate. Standard TCP-Friendly Rate Control (TFRC) wastes bandwidth and may react to congestion only when packet loss has already occurred. This paper presents a unicast transport protocol named RRB-SIMD for video streaming over the Internet,...
Quality of Service (QoS) is still one of the major challenges for emerging services based on the Real-Time Transport Protocol (RTP) to deliver multimedia content. In the context of the Internet Protocol Television (IPTV) services, the synchronization of multimedia components plays an important role. In order to synchronize audio and video components of multimedia content, RTP timestamps have to be...
Multimedia services have gained an increasing interest of industry and the research community over the last decade. In this paper we present an RTP-based platform for video streaming evaluation in simulated environments. We have developed a new NS-2 module providing an accurate RTP and RTCP implementation (following strictly the RFC 3550 specification) and we propose to combine it with several tools...
Real-time multimedia applications are time sensitive and require extra resources from the network, e.g. large bandwidth and big memory. However, wireless sensor networks (WSNs) suffer from limited resources such as computational, storage, and bandwidth capabilities. Therefore, sending real-time multimedia applications over WSNs can be very challenging. For this reason, we propose an adaptive multi-flows...
The reliable video transmission is very challenging. Efficient coding and transmission control techniques are required to meet the needs of QoS (quality of service). RTP, a real time transmission protocol, can provide the services of video transmission control. H.264, the latest coding and compression standard from ITU-T, is currently dominating the field by offering a flexible architecture and compression...
New emerging technologies like Multimedia applications require timely delivery of information as compared to reliability. The most widely used protocols over transport layer are Transmission Control Protocol (TCP) and User Datagram Protocol (UDP). Both of these have some drawbacks while using in real time applications. TCP increases delay in transfer of data but achieving reliable transfer of data...
In a traditional network stack, data from an application is transmitted in the order that it is received. An algorithm is proposed where information about the priority of packets and expiry times is used by the transport layer to reorder or discard packets at the time of transmission to optimise the use of available bandwidth. This can be used for video conferencing to prioritise important data. This...
The SVC (scalable video coding) extension to the recent video compression standard H.264/MPEG-4 AVC paves the way for video congestion control, by allowing flexible on-the-fly adjustments of the sending rate. We study the interaction between TFRC (TCP-friendly rate control) and application level rate control, and observe that TFRC requires relatively large router buffers to keep packet loss on acceptable...
With the rapid growth of wireless networks, wireless multimedia services are expected to be widely deployed in the near future. But wireless multimedia delivery is facing numerous challenges, e.g., in a dynamic and error-prone wireless environment, the packet drop rates are extremely high because lossy wireless channels are variable and unpredictable. For high bit rates multimedia transfer over wireless...
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