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Hilsmann A.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut
Optics InfoBase Conference Papers | Year: 2016

Capturing and rendering real world objects and scenes with high visual quality has been one of the main topics in Computer Vision and Graphics in the last decades. Often,we do not only wish to display the captured content but also modify it, interact with it and experience it in an immersive way. Classic Computer Graphics modelling and rendering provides the freedom of modification and animation, but often lacks visual realism, especially if real-time constraints should be met. Also, modelling often involves enormous manual work and rendering and animation require costly physical simulations. Recent approaches directly capture real world objects and scenes and infer object characteristics from the captured data.Furthermore, more and more image-based modeling techniques have been developed in order to meet both the requirements of realistic appearance and animation, especially for complex objects. This is where Computer Vision and Graphics meet. In this talk, I will give an overview on ongoing works covering the whole processing chain from capturing, image and video analysis and understanding to image-based modelling, editing and rendering. © 2016 Optical Society of America. © OSA 2016.

Vetro A.,MItsubishi Electric | Wiegand T.,TU Berlin | Wiegand T.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut | Sullivan G.J.,Microsoft
Proceedings of the IEEE | Year: 2011

Significant improvements in video compression capability have been demonstrated with the introduction of the H.264/MPEG-4 advanced video coding (AVC) standard. Since developing this standard, the Joint Video Team of the ITU-T Video Coding Experts Group (VCEG) and the ISO/IEC Moving Picture Experts Group (MPEG) has also standardized an extension of that technology that is referred to as multiview video coding (MVC). MVC provides a compact representation for multiple views of a video scene, such as multiple synchronized video cameras. Stereo-paired video for 3-D viewing is an important special case of MVC. The standard enables inter-view prediction to improve compression capability, as well as supporting ordinary temporal and spatial prediction. It also supports backward compatibility with existing legacy systems by structuring the MVC bitstream to include a compatible “base view.” Each other view is encoded at the same picture resolution as the base view. In recognition of its high-quality encoding capability and support for backward compatibility, the stereo high profile of the MVC extension was selected by the Blu-Ray Disc Association as the coding format for 3-D video with high-definition resolution. This paper provides an overview of the algorithmic design used for extending H.264/MPEG-4 AVC towards MVC. The basic approach of MVC for enabling inter-view prediction and view scalability in the context of H.264/MPEG-4 AVC is reviewed. Related supplemental enhancement information (SEI) metadata is also described. Various “frame compatible” approaches for support of stereo-view video as an alternative to MVC are also discussed. A summary of the coding performance achieved by MVC for both stereo- and multiview video is also provided. Future directions and challenges related to 3-D video are also briefly discussed. © 2010 IEEE.

BERLIN, Germany, Nov. 09, 2016 (GLOBE NEWSWIRE) -- InterDigital (NASDAQ:IDCC), Fraunhofer Heinrich Hertz Institute HHI, and Core Network Dynamics (CND), three partners from the H2020 5GPPP 5G-Crosshaul consortium, today announced the successful result of an extended, real-world deployment of an integrated fronthaul/backhaul network delivering 5G throughput and latency. The test, a first of its kind, sets the stage for cost-effective, highly flexible 5G network architecture. The results of the integrated millimeter wave (mmW) fronthaul/backhaul 5G Berlin Testbed were announced at the November 2nd IEEE 5G Berlin Summit and will be further presented at the 5G-PPP Global 5G event, taking place today and tomorrow in Rome. The 5G-Crosshaul test was carried out over more than a month at the Fraunhofer Heinrich Hertz Institute in Berlin, and delivered higher than 1.2 Gbps throughput and less than millisecond latency. Beyond the speed, the test’s integrated fronthaul/backhaul provides a working model for future 5G networks that will combine 4G architecture with a 5G fronthaul-based network edge. With this deployment, 5G radio network solutions can be implemented using commodity servers or even in the cloud – a major innovation that throws open the doors for new operator models. The 5G Berlin Testbed is a 5G field trial of InterDigital’s EdgeLink™ 60GHz solution, multiplexing both backhaul and CND’s Cloud-RAN next generation fronthaul solution over an integrated mmW mesh transport network. The system is installed outdoors, executing under environmental conditions from the end of September through November. The trial has included both natural and induced link failure events, to test network resiliency. “Millimeter wave technology will be a decisive cornerstone to bring 5G forward to enhanced mobile broadband harvesting new spectrum opportunities well above 6GHz, ultra-dense deployments and energy-efficient multi-Gigabit transmission,” explains Dr. Thomas Haustein, Head of Department for Wireless Communication and Networks at Fraunhofer HHI. “The 5G Berlin Testbed will provide valuable information that can be used to help advance the evolving 5G standards and specifications. We are already adapting OpenEPC to support critical 5G requirements. These include a distributed core network, plus architectures to support C-RAN and the cloudification of the radio access network,” said Carsten Brinkschulte, CEO, Core Network Dynamics. “Many companies have demonstrated systems that they qualify as ‘5G’ because of speed or latency characteristics, but this extended outdoor trial is the first example of a network edge architecture, tested in real-world conditions, that will be a key in eventual 5G deployment,” said, Alan Carlton, Vice President, InterDigital Europe. “Crosshaul’s major innovation may set the stage for a world where our definitions of what constitutes a network operator or infrastructure equipment are radically changed.” 5G-Crosshaul is an international project with 21 members aimed at developing integrated fronthaul and backhaul system solutions to support flexibility and unified management for 5G network architectures. To learn more about the project, visit http://5g-crosshaul.eu/. InterDigital develops mobile technologies that are at the core of devices, networks, and services worldwide. We solve many of the industry's most critical and complex technical challenges, inventing solutions for more efficient broadband networks and a richer multimedia experience years ahead of market deployment. InterDigital has licenses and strategic relationships with many of the world's leading wireless companies. Founded in 1972, InterDigital is listed on NASDAQ and is included in the S&P MidCap 400® index. InterDigital is a registered trademark of InterDigital, Inc. EdgeLink is a trademark of InterDigital, Inc. Innovations for the digital society of the future are the focus of research and development work at the Fraunhofer Heinrich Hertz Institute HHI. In this area, Fraunhofer HHI is a world leader in the development for mobile and optical communication networks and systems as well as processing and coding of video signals. Together with international partners from research and industry, Fraunhofer HHI works in the whole spectrum of digital infrastructure – from fundamental research to the development of prototypes and solutions. www.hhi.fraunhofer.de About Core Network Dynamics Headquartered in Berlin, Core Network Dynamics develops and markets OpenEPC, a complete mobile network infrastructure in software. Target markets include: carriers designing next-generation mobile networks using SDN/NFV; first responder/public safety organizations requiring a secure private LTE network compatible with off-the-shelf Smartphones; companies operating in remote areas where mobile coverage is patchy or non-existent; and operators evaluating advanced Mobile Edge Computing (MEC) concepts to implement distributed mobile networks for IoT applications. www.corenetdynamics.com

Schierl T.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut | Narasimhan S.,Motorola Inc.
Proceedings of the IEEE | Year: 2011

Three-dimensional video based on stereo and multiview video representations is currently being introduced to the home through various channels, including broadcast such as via cable, terrestrial and satellite transmission, streaming and download through the Internet, as well as on storage media such as Blu-ray discs. In order to deliver 3-D content to the consumer, different media system technologies have been standardized or are currently under development. The most important standards are MPEG-2 systems, which is used for digital broadcast and storage on Blu-ray discs, real-time transport protocol (RTP), which is used for real-time transmissions over the Internet, and the ISO base media file format, which can be used for progressive download in video-on-demand applications. In this paper, we give an overview of these three system layer approaches, where the main focus is on the multiview video coding (MVC) extension of H.264/AVC and the application of the system approaches to the delivery and storage of MVC. © 2010 IEEE.

Penna F.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut | Garello R.,Polytechnic University of Turin
IEEE Transactions on Wireless Communications | Year: 2012

In this paper we propose a decentralized approach for cooperative signal detection, based on peer-to-peer collaboration among sensor nodes. The proposed method combines belief propagation, implemented in a distributed fashion through the exchange of local messages to and from neighboring nodes, with a Neyman-Pearson framework, that allows control over the false-alarm rate of each node. At the same time, nodes gradually learn their degree of correlation with neighbors, and clusters of nodes under homogeneous conditions are formed automatically. The performance of the resulting "Neyman-Pearson belief propagation" (NP-BP) algorithm is shown to be nearly equivalent to that of cooperative energy detection applied separately at each cluster. Thanks to its decentralized structure, NP-BP provides improved robustness, flexibility, and scalability compared to traditional, centralized schemes. In addition, its ability to adaptively form clusters makes the algorithm suitable for heterogeneous or time-varying radio environments. © 2002-2012 IEEE.

Wymeersch H.,Chalmers University of Technology | Penna F.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut | Savic V.,Technical University of Madrid
IEEE Transactions on Wireless Communications | Year: 2012

In this paper, we propose a new inference algorithm, suitable for distributed processing over wireless networks. The algorithm, called uniformly reweighted belief propagation (URW-BP), combines the local nature of belief propagation with the improved performance of tree-reweighted belief propagation (TRW-BP) in graphs with cycles. It reduces the degrees of freedom in the latter algorithm to a single scalar variable, the uniform edge appearance probability ρ. We provide a variational interpretation of URW-BP, give insights into good choices of ρ, develop an extension to higher-order potentials, and complement our work with numerical performance results on three inference problems in wireless communication systems: spectrum sensing in cognitive radio, cooperative positioning, and decoding of a low-density parity-check (LDPC) code. © 2012 IEEE.

Muller K.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut | Merkle P.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut | Wiegand T.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut
Proceedings of the IEEE | Year: 2011

Current 3-D video (3DV) technology is based on stereo systems. These systems use stereo video coding for pictures delivered by two input cameras. Typically, such stereo systems only reproduce these two camera views at the receiver and stereoscopic displays for multiple viewers require wearing special 3-D glasses. On the other hand, emerging autostereoscopic multiview displays emit a large numbers of views to enable 3-D viewing for multiple users without requiring 3-D glasses. For representing a large number of views, a multiview extension of stereo video coding is used, typically requiring a bit rate that is proportional to the number of views. However, since the quality improvement of multiview displays will be governed by an increase of emitted views, a format is needed that allows the generation of arbitrary numbers of views with the transmission bit rate being constant. Such a format is the combination of video signals and associated depth maps. The depth maps provide disparities associated with every sample of the video signal that can be used to render arbitrary numbers of additional views via view synthesis. This paper describes efficient coding methods for video and depth data. For the generation of views, synthesis methods are presented, which mitigate errors from depth estimation and coding. © 2010 IEEE.

Zilly F.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut | Kluger J.,KUK Film Production | Kauff P.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut
Proceedings of the IEEE | Year: 2011

This paper gives an overview on the framework of production rules that are required for the acquisition of adequate stereo content. It is well known that if stereo is not produced properly, consequences for the human 3-D perception might be eye strain and visual fatigue. Therefore, to avoid discomfort, stereographers use a production grammar that reflects extensive knowledge and experience in the fields of 3-D perception, stereo geometry, video technology, and content creation. Some of these rules are of heuristic nature, and others are motivated by perceptual, geometric, or technical aspects. The application of these rules at the set usually results in time-consuming manual work for rigging and adjusting stereo cameras before shooting. Against this background the paper reviews relevant aspects of 3-D perception, the fundamentals of stereo geometry, and the main rules of stereo production. Finally, it describes the functionality of camera assistance systems that have recently been proposed for stereo acquisition and production in order to ease the work of stereographers at the set and, with it, to save time and to make stereo productions more efficient. © 2010 IEEE.

Boche H.,TU Munich | Schubert M.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut
IEEE Transactions on Information Theory | Year: 2011

Many solutions and concepts in resource allocation and game theory rely on the assumption of a convex utility set. In this paper, we show that the less restrictive assumption of a logarithmic hidden convexity is sometimes sufficient. We consider the problems of Nash bargaining and proportional fairness, which are closely related. We extend the Nash bargaining framework to a broader family of log-convex sets. We then focus on the set of feasible signal-to-interference-plus-noise ratios (SINRs), for the cases of individual power constraints and a sum power constraint. Under the assumption of log-convex interference functions, we show how Pareto optimality of boundary points depends on the interference coupling between the users. Finally, we provide necessary and sufficient conditions for strict log-convexity of the feasible SINR region. © 2011 IEEE.

Bach H.-G.,Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institut
ECS Transactions | Year: 2013

High-bit rate fiber networks, remote antenna driving, and measurement applications need a variety of high-performance photodetectors, exhibiting ultra-high frequencies or bandwidths. Based on waveguide-integrated detectors, three special detector types are presented, which address flexible coupling to subsequent electronics (bias-feeding detector), clock extraction capability (narrowband photodetectors) and free space radiation into the sub-THz range (self-biased pin-antenna chip). © The Electrochemical Society.

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