In the context of immersive communications that aim to enable natural experiences and interactions among people, objects, and the environment, we propose a method to enable natural video interactions through hand gesture recognition between users and a video meeting system. An end‐to‐end study was performed: we started with the development of specific gesture recognition algorithms and concluded with a user evaluation to validate our results. Gestures and their associated functionalities were identified via a user survey which focused on distinguishing two concepts which are often confused: hand posture and hand gesture (i.e., static versus dynamic). Our recognition process was composed of two main tasks: hand posture recognition (i.e., skin segmentation, background subtraction, region combination, feature extraction, and classification) and hand gesture recognition (tracking and recognition). Our approach combined a signal similarity study with a data‐mining tool for dynamic gesture recognition. We focused on the experimentation and user evaluation to improve our approach, taking into account user feedback and analyzing performance in different environments and for different users. © 2013 Alcatel‐Lucent.
Abstract:This article presents a Policy Infonnation Model for RFC2547-like IP VPNs. Policy Infonnation Models are the key component of Policy-based Management systems. They describe a set of service specific policy conditions andlor policy actions, used to fonnulate the policy mies to fonnalise a service.In this artic1e, the principles of Policy-based Management are reminded and the role and usage of Policy Infonnation Models is introduced. Then this artic1e provides adescription of the way an RFC2547-like IP VPN is provisioned in a network. Finally the authors propose a Policy Infonnation Model for managing RFC2547-like IP VPNs.Keywords: BGP/MPLS VPNs, Policy Infonnation Model INTRODUCTIONThis artic1e presents an IP Virtual Private Network (VPN) Policy Information Model. The targeted VPN service is based on an IP network where MPLS is used for forwarding packets over the core, and BOP is used for distributing routes over the core. Moreover, only the case of a network based (or PE-based) VPN is considered here. These kind of IP VPNs are described in RFC 2547 [1]. They will be called hereafter RFC2547-like IP VPNs. Policy information models are used in the context of Policy-based Management, which principles are defined in [2]. The IP VPN Policy Information Model presented hereafter defines a set of policy actions related to the management of RFC2547-like IP VPNs services, that will be used to implement policy rules that are the key components of Policy-based Management.
Multimedia Quality of Experience (QoE) is not only a matter of Quality of Service (QoS). Network-based metrics such as delay, jitter or packet loss ratio are critical indicators for multimedia services; nevertheless, we believe that considering the expectations of all the parties in a communication scenario can help improving the overall QoE. Through the empirical examples of radio and movies production, we show that the form of a multimedia object must serve its content, i.e. the author(s)' intentionality. We propose an intention-aware multimedia model which explicitly distinguishes form and content to grant robustness and flexibility to multimedia communications, persisting the producer(s)' intention while adapting it to the consumer(s)' context. Finally, this approach is studied in an immersive video-conferencing use case.Index Terms-immersive communication, multimedia, quality of experience, quality of service
SlideWorld is a Bell Labs research project that aims to create a new immersive user experience in the situation of videoconferencing. It addresses two types of user experiences: the remote listener's immersion in the event and the speaker's augmented feedback channel from the remote listeners. Such innovation may leverage technical novelties (such as smile detection) or usage novelties (such as virtual neighbors selected in a crowd). SlideWorld is an example of a successful project that managed to innovate by smoothly integrating technical and usage novelties. To do so, a multidisciplinary team of computer scientists, ergonomists, and designers ran several rounds of design, development, and experimentation to define/refine the user experience and its actual implementation. This paper exemplifies this typical multidisciplinary work. © 2013 Alcatel‐Lucent.
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