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This paper presents a new low-complexity H.264 encoder for Unmanned Aerial Vehicles (UAV) applications. Standard video coding systems currently employed in UAV applications do not rely on some peculiarities in terms of scene 3D model and correlation among successive frames. In particular, the observed scene is static, i.e. the camera movement is dominant,(More)
This paper analyzes a joint error resilience and error concealment method (J-ER-EC) for video sequences. The method is based on a spatial-domain error concealment approach plus some redundant information, providing an edge-based sketch-description of the whole frame. The technique has its origin in well-known ideas concerning the use of side information to(More)
UMTS, as a third generation mobile communications system, has been developed to offer, in addition to traditional basic services - such as voice telephony, broader data connections and multimedia services. Channel reliability, the most common problem affecting mobile communications, strongly influences such new services and, in particular, the quality of(More)
How to render very complex datasets, and yet maintain interactive response times, is a hot topic in volume rendering. In this paper we focus on projective visualization of datasets represented via tetrahedral tessel-lations. Direct projective visualization is performed by sorting tetrahedra with respect to view direction and then by projecting them onto the(More)
In this paper we propose an innovative video-based architecture aimed to monitor elderly people. It is based on cheap devices and open-source libraries and preliminary tests demonstrate that it manages to achieve a significant performance. The overall architecture of the system and its implementation are shortly discussed from the point of view of the(More)
Automatic 3D acquisition devices (often called 3D scanners) allow to build highly accurate models of real 3D objects in a costand time-effective manner. We have experimented this technology in a particular application context: the acquisition of Cultural Heritage artefacts. Specific needs of this domain are: medium-high accuracy, easy of use, affordable(More)
Vehicular ad hoc networks (VANETs) are one emerging type of networks that will enable a broad range of applications such as public safety, traffic management, traveler information support and entertain ment. Whether wireless access may be asynchronous or synchronous (respectively as in the upcoming IEEE 8021.11p standard or in some alternative emerging(More)
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