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Publications associées (454)

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Mutual information eigenlips for audio-visual speech recognition

Jean-Philippe Thiran, Ivana Arsic de Heras Ciechomska

This paper proposes an application of information theoretic approach for finding the most informative subset of eigenfeatures to be used for audio-visual speech recognition tasks. The state-of-the-art visual feature extraction methods in the area of speech ...

IEEE2006

Algorithm and VLSI architecture for linear MMSE detection in MIMO-OFDM systems

Andreas Peter Burg

The paper describes an algorithm and a corresponding VLSI architecture for the implementation of linear MMSE detection in packet-based MIMO-OFDM communication systems. The advantages of the presented receiver architecture are low latency, high-throughput, ...

Ieee Service Center, 445 Hoes Lane, Po Box 1331, Piscataway, Nj 08855-1331 Usa2006

On achievable information rates in single-source non-uniform demand networks

Christina Fragouli, Emina Soljanin

A non-uniform demand network consists of a source and a set of receivers that have different min-cut values from the source. We look at the case where the receivers would like to receive from the source a rate that is (approximately) equal to their min-cut ...

2006

Analytic Determination of Scaling Parameters

Rüdiger Urbanke, Abdelaziz Amraoui, Andrea Montanari

We show that the finite-length scaling parameters for irregular LDPC codes when used over the binary erasure channel can be computed without resorting to ``covariance evolution''. We provide simple expressions that can be evaluated using solely the degree ...

2006

From EEG Dependency Multichannel Matching Pursuit to Sparse Topographic Decomposition

Ulrich Hoffmann

In this work we present a multichannel EEG decomposition model based on an adaptive topographic time-frequency approximation technique. It is an extension of the Matching Pur- suit algorithm and called Dependency Multichannel Matching Pursuit (DMMP). It ta ...

2006

Feedback communication over unknown channels

Aslan Tchamkerten

Suppose Q is a family of discrete memoryless channels. An unknown member of Q will be available, with perfect, causal output feedback for communication. Is there a coding scheme (possibly with variable transmission time) that can achieve the Burnashev erro ...

EPFL2005

Joint source-channel coding with feedback

Communications is about conveying information from one point to another subject to certain performance constraints. The information is assumed to be generated by a source and may, for example, represent a voice waveform, the reading of a thermal sensor, or ...

EPFL2005

On the use of training sequences for channel estimation

Emre Telatar, Aslan Tchamkerten

Suppose Q is a family of discrete memoryless channels. An unknown member of Q is available with perfect (causal) feedback for communication. A recent result (A. Tchamkerten and I.E. Telatar) shows the existence, for certain families of channels (e.g. binar ...

2005

Power, Spatio-Temporal Bandwidth, and Distortion in Large Sensor Networks

Martin Vetterli, Michael Christoph Gastpar

For a class of sensor networks, the task is to monitor an underlying physical phenomenon over space and time through an imperfect observation process. The sensors can communicate back to a central data collector over a noisy channel. The key pa- rameters i ...

Institute of Electrical and Electronics Engineers2005

Causal coding and feedback in Gaussian sensor networks

Michael Christoph Gastpar

Varaiya and Walrand found an elegant insight regarding the use of feedback in a causal coding context: While generally useful, feedback becomes useless when the channel is sufficiently symmetric. The goal of this note is to extend this insight to scenarios ...

Birkhauser Boston, C/O Springer-Verlag, Service Center, 44 Hartz Way, Secaucus, Nj 07096-2491 Usa2005