FG Nachrichtenübertragung

7 Items

Recent Submissions
Steered mixture-of-experts for image and light field representation, processing, and coding

Verhack, Ruben (2020)

Virtual reality for camera-recorded scenes is fundamentally different from the VR experience of, for example, computer games. The problem is much more challenging due to the scene's lack of geometric knowledge. Currently, 360-degree video is the primary form of immersive experience of camera-recorded images (CC-VR), but it is not yet sufficient for a full VR experience. More specifically, viewe...

Player identification in football videos using visual features and positional constellation models

Gerke, Sebastian (2020)

As football is one of the worlds most popular sports, the ever-increasing amount of football video content and the tight competition between teams lead to an increasing demand in tools for automatic analysis of football videos. The work presented here proposes an approach for automatic player identification in broadcast football videos. It is – to the best of the author’s knowledge – one of t...

Performance improvement of optical high-speed short-range communication systems utilizing bandwidth extension and advanced digital signal processing

Kottke, Christoph (2019)

High-speed short-range optical links are a key technology for data center applications. Today, they enable the transmission of huge amounts of information in a cost and energy efficient way and are typically based on simple optics and on-off keying modulation. In order to meet the world-wide increasing demand on transmission capacity for these optical links, new approaches are required to impro...

Estimation and analysis of motion in video data

Senst, Tobias (2019)

Motion plays an important role in machine perception to automatically analyze the content of sceneries which have been captured by video cameras. The information obtained from moving objects and surfaces allows the dynamical behavior of entities on different abstraction levels to be analyzed and is a decisive element for the understanding of the scenery. The technical concept of optical flow wa...

An Architecture for a Next Generation VoIP Transmission System

Hoene, Christian ; Clüver, Kai ; Weil, Jan (2007)

Packetized speech transmission systems implemented with Voice over IP are gaining momentum against the traditional circuit switched systems despite the fact that packet switched VoIP is two to three times less efficient than its circuit switched counterpart. At the same time, it only supports a rather bad “toll” quality. We believe that it is time for a new architecture developed from scratch –...

Security by similarity: information-theoretic secrecy and decentralized detection algorithms for wireless networks

Mohammadi, Jafar (2017)

The broadcasting attribute of the wireless communication channel poses severe security vulnerabilities since any adversary node in the range of reception is able to listen as well as to disrupt the ongoing communication. This dissertation considers the problem of security from two different perspectives: The information-theoretic approach at the physical-layer to avert eavesdropping and central...

Low complexity embedded fingerprint verification and identification system

Sun, Wei (2016)

A qualified fingerprint verification and identification system should resolve most of the problems of fingerprint image enhancement and fingerprint matching. In practice, the fingerprint images are not ideal and may have totally different qualities when the fingers are too moist too dry, improperly placed, or from some users who are engaged in heavy manual work. Furthermore nonlinear deformatio...