Erika Müller

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This work presents a new VLSI model for biological neural systems, a unified research tool for neuro- as well as computer science. It allows construction of neural microcircuits close to the biological specimen while maintaining a speed several orders faster than real time. The synapse model includes an implementation of spike time dependent plasticity(More)
The ongoing research on Distributed Video Coding (DVC) is focused on flexibility and increased rate distortion (RD) performance. Besides Slepian-Wolf (SW) coding and coder control, a good side information (SI) quality is essential for high RD performance. The SI is typically extracted by temporal inter-/extrapolation. Fast motion is still a challenge. Two(More)
This paper presents a new watermarking framework, suitable for authentication of H.264 compressed videos. The authentication data is embedded as fragile, blind and erasable watermark with low video quality degradations. Because of using a fragile watermark, hard authentication is possible. In contrast to other approaches, the watermarking is done after the(More)
Authentication watermarking approaches can be classified into two kinds: fragile and semi-fragile. In contrast to the latter one, fragile watermarking does not tolerate modifications of any single bit of the watermarked data. Since the transmission of digital data often requires lossy compression, an authentication system should accept non-malicious(More)
Experiments were performed in bovine chromaffin cells in short term primary culture. Tetrandrine is a plant alkaloid from the chinese medical herb Stefania tetrandra. The aim of the present study was to investigate the mechanisms by which tetrandrine interacts with calcium signalling and to provide a quantitative description of effects. Tetrandrine blocked(More)
Our paper proposes an enhanced video watermarking approach. The fundamental idea is to use geometric warping for watermarks with high predictable robustness to lossy compression. We explain the basic watermarking approach which uses a block based statistic (Normed Centre of Gravity NCG) to describe the geometric structure of blocks. The NCG also is used to(More)
Current investigations in the area of 3D video systems are based on depth map sequences. They are used to determine the compatibility with conventional 2D video systems. Instead of transmitting or storing two 2D video sequences for each eye, 2D video and the appropriate depth information is delivered. If the viewer owns a standard TV set, only the video is(More)