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HTTP-based delivery for Video on Demand (VoD) has been gaining popularity within recent years. Progressive Download over HTTP, typically used in VoD, takes advantage of the widely deployed network caches to relieve video servers from sending the same content to a high number of users in the same access network. However, due to a sharp increase in the(More)
The extension of H.264/AVC hybrid video coding towards scalable video coding (SVC) using motion-compensated temporal filtering (MCTF) is presented. Utilizing the lifting approach to implement MCTF, the motion compensation features of H.264/AVC can be re-used for the MCTF prediction step and extended in a straightforward way for the MCTF update step. The(More)
—The Scalable Video Coding (SVC) standard as an extension of H.264/AVC allows efficient, standard-based temporal, spatial, and quality scalability of video bit streams. Scalability of a video bit stream allows for media bit rate as well as for device capability adaptation. Moreover, adaptation of the bit rate of a video signal is a desirable key feature, if(More)
The scalability extension of H.264/AVC uses a layered MCTF approach for providing spatial, temporal, and SNR scalability. The underlying MCTF decomposition scheme generally results in a large structural encoding−decoding delay, which prevents the use in low−delay applications. In this paper we present a new strategy for restricting the MCTF decomposition in(More)
OBJECTIVE Television and computer game consumption are a powerful influence in the lives of most children. Previous evidence has supported the notion that media exposure could impair a variety of behavioral characteristics. Excessive television viewing and computer game playing have been associated with many psychiatric symptoms, especially emotional and(More)
The ongoing standardization activity in DVB on IP−based video and audio streaming services over DVB−H networks currently specifies three terminal classes ranging from QCIF, 15 Hz, and max. 128 kbit/s to CIF, 30 Hz, and max. 768 kbit/s. The reason for specifying these is to offer ser−vices to different terminal classes with different processing and battery(More)
We propose a dynamic sharing of radio resources in a wireless multiuser system by combining a flexible video coding scheme, namely the currently developed scalable video coding (SVC) extension of H.264/AVC with appropriate radio link buffer management for multiuser streaming services. The paper introduces the components of the proposed system and the used(More)
—A unified optimization framework for rate allocation among multiple video multicast sessions sharing a wireless network is presented. Our framework applies to delivery of both scalable and non-scalable video streams. In both cases, the optimization objective is to minimize the total video distortion of all peers without incurring excessive network(More)
— Peer-to-peer (P2P) networks represent a valuable architecture for streaming video over the Internet. In these systems, users contribute their resources to relay the media to others and no dedicated infrastructure is required. In order to ensure a low end-to-end delay, P2P overlay networks are often organized as a set of complementary multicast trees. The(More)