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Accurate, dynamic rate selection is considered a hard problem in stream switching video applications over Internet Protocol. Not only the feedback delay but also the unawareness about the dynamics of the underlying HTTP/TCP transport layer require streaming applications to implement huge receiver buffers in the order of tens of seconds so as to maintain continuous video rendering with acceptable quality...
Despite the fact that non-interactive Internet multimedia applications are prevalently deployed via HTTP/TCP, dedicated real-time protocols remain the essential basis for interactive voice and video services. This is particularly pronounced by the standardization of WebRTC, which enables peer-to-peer realtime communication between web browsers via the RTP protocol suite. However, a compound solution...
Due to the increasing number of portable and mobile consumer electronics devices, today's Internet paths include generally at least one wireless segment. Predominant architectures are IEEE 802.11 wireless as well as 3G/4G mobile networks. Dynamic stream switching schemes such as DASH (Dynamic Adaptive Streaming over HTTP) have been developed in order to adapt the rigid bandwidth requirement of real-time...
Today’s dominant Internet transport protocol – TCP – is known to achieve a low bandwidth utilization on lossy large bandwidth-delay product paths. As such paths become common in the Internet, TCP’s inefficiency will be the main bottleneck in deploying high-rate, low-latency communications services such as tele-presence, free-viewpoint video or virtual reality. In this paper, we present PRRT – Predictably...
Due to the increasing number of portable and mobile consumer electronic devices, today's Internet paths include generally at least one wireless segment. Predominant architectures are IEEE 802.11 wireless as well as 3G/4G mobile networks. While the actual bandwidth provisioning on those networks is no longer the limiting factor for high definition media streaming, the quality of such services is severely...
As audiovisual communications services become the dominant traffic source in the Future Internet, their stable coexistence and their fairness towards background traffic is an active research topic. The Internet implements flow multiplexing in a decentralized fashion via congestion control. Audiovisual media streams, however, are classified as inelastic traffic flows that do not allow rate control...
Despite the fact that the Internet Protocol has not been designed to carry real-time media services at high data rate, such as digital TV in High Definition resolution, it is mean-while widely deployed as an alternative carrier infrastructure. Especially the IEEE 802.11 family of wireless LAN standards offers a convenient and inexpensive way to deliver media streams within the home network area. However,...
3D-HDTV is considered to be the next milestone in the evolution of digital video storage and transmission. Providing two views of a scene instead of just one may only be the beginning of the era of multi-view video services. Yet, the major challenge in designing multi-view transport and rendering architectures is to prevent them from scaling linearly in resource consumption. With respect to network...
Overlay architectures are the information theoretical playgrounds of the Internet. They provide significant gains in throughput by shifting complexity into the network nodes. A consequence is the requirement for smart routers between adjacent network segments. Since meanwhile audiovisual media allocate the major part of the Internet traffic, protocols as well as overlay structures have to serve Predictable...
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