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Martin Vetterli

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Publications associées (262)

Noninvasive temperature monitoring in breast-mimicking phantoms using acoustic tomography

Martin Vetterli, Luciano Sbaiz, Ivana Jovanovic

2007

Experiences with Reproducible Research in Various Facets of Signal Processing Research

Martin Vetterli, Patrick Vandewalle, Guillermo Barrenetxea Kobas, Andrea Ridolfi, Ivana Jovanovic

How often have you been able to implement an algorithm as it is described in a paper? And when you did, were you confident that you had exactly the same parameter values and results as the authors of the paper? All too often, articles do not describe all t ...

2007

Efficient and Stable Acoustic Tomography Using Sparse Reconstruction Methods

Martin Vetterli, Luciano Sbaiz, Ivana Jovanovic, Ali Hormati

We study an acoustic tomography problem and propose a new inversion technique based on sparsity. Acoustic tomography observes the parameters of the medium that influence the speed of sound propagation. In the human body, the parameters that mostly influenc ...

2007

Sampling Moments and Reconstructing Signals of Finite Rate of Innovation: Shannon Meets Strang-Fix

Martin Vetterli, Pier Luigi Dragotti, Thierry Blu

Consider the problem of sampling signals which are not bandlimited, but still have a finite number of degrees of freedom per unit of time, such as, for example, nonuniform splines or piecewise polynomials, and call the number of degrees of freedom per unit ...

Institute of Electrical and Electronics Engineers2007

Dynamic Measurement of Room Impulse Responses using a Moving Microphone

Martin Vetterli, Luciano Sbaiz, Thibaut Ajdler

A novel technique for the recording of large sets of room impulse responses or head-related transfer functions is presented. The technique uses a microphone or a loudspeaker moving with constant speed. Given a setup (e.g. length of the room impulse respons ...

2007

The Effective Rank: A Measure of Effective Dimensionality

Martin Vetterli, Olivier Roy

Many signal processing algorithms include numerical problems where the solution is obtained by adjusting the value of parameters such that a specific matrix exhibits rank deficiency. Since rank minimization is generally not practicable owing to its integer ...

2007

Locating Mobile Nodes with EASE: Learning Efficient Routes from Encounter Histories Alone

Martin Vetterli, Matthias Grossglauser

Routing in large-scale mobile ad hoc networks is challenging because all the nodes are potentially moving. Geographic routing can partially alleviate this problem, as nodes can make local routing decisions based solely on the destinations' geographic coord ...

2006

Spatio-Temporal Sampling and Distributed Compression of the Sound Field

Martin Vetterli, Robert Konsbruck, Luciano Sbaiz, Olivier Roy, Emre Telatar, Thibaut Ajdler

We investigate how the sound field induced by an acoustic event evolves over space and time. The characteristics of its bidimensional Fourier spectrum are analyzed and spatio-temporal sampling results using an array of microphones are provided for differen ...

2006

Sampling and exact reconstruction of bandlimited signals with additive shot noise

Martin Vetterli, Pina Marziliano, Thierry Blu

In this correspondence, we consider sampling continuous-time periodic bandlimited signals which contain additive shot noise. The classical sampling scheme does not perfectly recover these particular nonbandlimited signals but only reconstructs a lowpass fi ...

IEEE2006

Registration of Aliased Images for Super-Resolution Imaging

Martin Vetterli, Luciano Sbaiz, Sabine Süsstrunk, Patrick Vandewalle

Super-resolution imaging techniques reconstruct a high resolution image from a set of low resolution images that are taken from almost the same point of view. The problem can be subdivided into two main parts: an image registration part where the different ...

2006

Signal Reconstruction from Multiple Unregistered Sets of Samples using Groebner Bases

Martin Vetterli, Luciano Sbaiz, Patrick Vandewalle

We present a new method for signal reconstruction from multiple sets of samples with unknown offsets. We rewrite the reconstruction problem as a set of polynomial equations in the unknown signal parameters and the offsets between the sets of samples. Then, ...

2006

Two Stage Estimation for the Echo Paths in Stereophonic Acoustic Echo Cancellation

Martin Vetterli, Christof Faller

A novel algorithm is introduced for estimating the echo path responses for stereophonic acoustic echo cancellation. When the Wiener solution for the echo path responses is non-unique, the echo paths are estimated in two stages. In a first stage, one of the ...

2006

Sensing reality and communicating bits: A dangerous liaison

Martin Vetterli, Pier Luigi Dragotti, Michael Christoph Gastpar

The successful design of sensor network architectures depends crucially on the structure of the sampling, observation, and communication processes. One of the most fundamental questions concerns the sufficiency of discrete approximations in time, space, an ...

2006

Room impulse responses measurement using a moving microphone

Martin Vetterli, Luciano Sbaiz, Thibaut Ajdler

In this paper, we present a technique to record a large set of room impulse responses using a microphone moving along a tra jectory. The technique processes the signal recorded by the microphone to reconstruct the signals that would have been recorded at a ...

2006

Method and system for combining video with spatio-temporal alignment

Serge Ayer, Martin Vetterli, Paolo Prandoni

Given two video sequences (IS1, IS2), a composite video sequence can be generated which includes visual elements from each of the given sequences, suitably synchronized and represented in a chosen focal plane (figure 1). For example, given two video sequen ...

2006

The Distributed Karhunen-Loève Transform

Martin Vetterli, Pier Luigi Dragotti, Michael Christoph Gastpar

The Karhunen–Loève transform (KLT) is a key ele- ment of many signal processing and communication tasks. Many recent applications involve distributed signal processing, where it is not generally possible to apply the KLT to the entire signal; rather, the K ...

2006

Rate-Constrained Beamforming for Collaborating Hearing Aids

Martin Vetterli, Olivier Roy

Hearing aids are audio capture devices which aim at providing the hearing impaired with better audibility. Most of the state-of-the-art systems involve sensing devices that work independently. However, the availability of a wireless communication link betw ...

2006

Collaborating Hearing Aids

Martin Vetterli, Olivier Roy

Hearing aids are electronic, battery-operated sensing devices which aim at compensating various kinds of hearing impairments by means of appropriate signal processing. Most of today's hearing aid systems consist of two appliances working independently of e ...

2006

A Frequency Domain Approach to Registration of Aliased Images with Application to Super-Resolution

Martin Vetterli, Sabine Süsstrunk, Patrick Vandewalle

Super-resolution algorithms reconstruct a high resolution image from a set of low resolution images of a scene. Precise alignment of the input images is an essential part of such algorithms. If the low resolution images are undersampled and have aliasing a ...

2006

Lattice Networks: Capacity Limits, Optimal Routing and Queueing Behavior

Martin Vetterli, Guillermo Barrenetxea Kobas

Lattice networks are widely used in regular settings like grid computing, distributed control, satellite constellations, and sensor networks. Thus, limits on capacity, optimal routing policies, and performance with finite buffers are key issues and are add ...

2006

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