Current Issue : July - September Volume : 2016 Issue Number : 3 Articles : 4 Articles
We consider a face-to-face\nvideoconferencing system that uses a Kinect camera at\neach end of the link for 3D modeling and an ordinary\n2D display for output. The Kinect camera allows\na 3D model of each participant to be transmitted;\nthe (assumed static) background is sent separately.\nFurthermore, the Kinect tracks the receiver�s head,\nallowing our system to render a view of the sender\ndepending on the receiver�s viewpoint. The resulting\nmotion parallax gives the receivers a strong impression\nof 3D viewing as they move, yet the system only needs\nan ordinary 2D display. This is cheaper than a full\n3D system, and avoids disadvantages such as the need\nto wear shutter glasses, VR headsets, or to sit in a\nparticular position required by an autostereo display.\nPerceptual studies show that users experience a greater\nsensation of depth with our system compared to a\ntypical 2D videoconferencing system....
The passive radar is a hot research topic. A multi-channel wideband passive radar experimental\nsystem is designed and the digital television terrestrial broadcasting (DTTB) signal is chosen to\ncarry out the target detection experiment of civil aviation aircraft. The polarization and spatial\nfiltering methods are used to solve the strong direct path interference suppression problems\nbrought by the receiving system location; combined with the characteristics of DTTB signal, the\nblock length selection interval in the block batch processing method for range-Doppler images\ncalculation is given; the clutter suppression performance is compared through the experimental\ndata receiving from different bistatic polarization channels, the conclusion is different from the\nmonostatic radar and it can guide the passive radar experiment....
This paper presents solution to satellite communication technologies to improve quality of education and the benefit of\ndigital technology to where previously Information and communication Technology (ICT) infustructure could not reach in Ghana. The\ntarget is to establish the best connectivity, infrastructure and services for E-learning and cooperate organizations in urban educational\ninstitutions and large rural and remote locations that lack infrastructure. The huge cost for wideband and significant broadband\nconnectivity requirements, quality delivery of content, applications interactivity is the bases for exploiting DVB-RCS technology. The\nArchitecture of DVB-RCS based satellite network supports interactive and multimedia applications. This network will deliver live\nstreaming contents to numerous users simultaneously at any time anywhere. The aim is an implementation of high bandwidth multicast\nsatellite technologies for education. The technology address live streaming of voice, data and video over IP contents simultaneously to\nnumerous users in any location. This initiative is part of development of a two way satellite network, to support E-learning\nenvironments with emphasis with situations in Ghana, with solutions based on Digital Video Broadcasting-Return Channel via\nSatellite....
Multimedia broadcast is the most efficient method to distribute identical content to multiple users in the Evolved Packet System\n(EPS). EPS enables efficient usage of network resources and provisioning of quality of service for every user. Third-party control\nallows applications in an enterprise domain to invoke network functions like multimedia broadcast. In this paper, an approach to\nmodeling the behavior of Service Capability Server (SCS) for multimedia broadcast in EPS is presented. Third-party applications can\naccess multimedia broadcasting capabilities by using Parlay X Web Service interfaces. The SCS for multimedia broadcast exposes\nParlay X interfaces toward 3rd-party applications and control protocols toward the network. The SCS functional behavior has to\nbe synchronized with the application view on message broadcast and the state of the network resources intended for the broadcast\nsession.Models of multicast session, IP connectivity session, and bearers� and charging session are proposed and formally described\nusing the notation of Label Transition Systems. The concept of weak bisimilarity is used to prove that models expose equivalent\nbehavior; that is, they are synchronized....
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