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Nearly all of the multimedia streaming applications running on the Internet today are basically configured or designed for 2D video broadcast or multicast purposes. With its tremendous flexibility, MPEG-4 interactive clientserver applications are expected to play an important role in online multimedia services in the future. This paper presents the...
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... server maintains a list of sessions established with clients and a list of associated transport channels and their QoS characteristics. Figure 2 shows the components of the MPEG-4 Server. The Encoder/Producer compresses raw video sources in real-time or reads out MPEG-4 content stored in MP4 files. ...
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Citations
... The second project uses RTP/UDP. Design studies for solutions without DMIF have been published by Liu et al. [14] and Wu et al. [15]. Both concepts use SL packets and RTP/UDP. ...
... ntations carry SL-packetized streams and use TCP for session control. [5] maps SL packets onto UDP. The second project uses RTP/UDP. Design studies for solutions without DMIF have been published by Liu et al. [14] and Wu et al. [15]. Both concepts use SL packets and RTP/UDP. FlexMux is optional for the first proposal , but mandatory for the second. [14] supports MultiSL too. The second concept suggests source rate control via RTCP-based receiver feedback. Further open source projects exist. These projects do not consider transparent scaling. ...
Multimedia streaming is becoming increasingly popular. The multimedia standard MPEG-4 was designed to support scenes of different levels of complexity and applications with low bandwidth up to very high bandwidth requirements. Scalable video encoding is supported as well. This allows MPEG-4 streaming software to adapt video quality dynamically in the network to currently given QoS conditions. We evaluate packetization modes designed to transport MPEG-4 elementary streams over RTP connections, based on an implementation of an MPEG-4 video server and a demo client. Suitability of the packetization modes for video stream adaptation in the network nodes is discussed.
Multimedia technology and networks protocol are the basic technology of the video surveillance system. A network remote video surveillance system based on MPEG-4 video coding standards is designed and implemented in this paper. The advantages of the MPEG-4 are analyzed in detail in the surveillance field, and then the real-time protocol and real-time control protocol (RTP/RTCP) are chosen as the networks transmission protocol. The whole system includes video coding control module, playing back module, network transmission module and network receiver module The scheme of management, control and storage about video data are discussed. The DirectShow technology is used to playback video data. The transmission scheme of digital video processing in networks, RTP packaging of MPEG-4 video stream is discussed. The receiver scheme of video date and mechanism of buffer are discussed. The most of the functions are archived by software, except that the video coding control module is achieved by hardware. The experiment results show that it provides good video quality and has the real-time performance. This system can be applied into wide fields.
Computer and multimedia technology plays an increasingly important role in education. However, current educational multimedia systems suffer from a major drawback that they do not support active engagement from users. In this paper we present a system that overcomes the hurdle. Our system offers rich user interactivity; it naturally supports and invites user involvement in a multimedia presentation. In the paper we first categorize the different levels of user interactivity that we deem vital for an interactive multimedia system, and then we describe a system design that enables active engagement.
