Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Wiesmeyr, Christoph"'
Publikováno v:
Appl. Comput. Harmon. Anal. 47 (2019) 975-1013
We present a novel family of continuous, linear time-frequency transforms adaptable to a multitude of (nonlinear) frequency scales. Similar to classical time-frequency or time-scale representations, the representation coefficients are obtained as inn
Externí odkaz:
http://arxiv.org/abs/1503.05439
A method for constructing non-uniform filter banks is presented. Starting from a uniform system of translates, generated by a prototype filter, a non-uniform covering of the frequency axis is obtained by composition with a warping function. The warpi
Externí odkaz:
http://arxiv.org/abs/1409.7203
Autor:
Lachambre, Helene, Ricaud, Benjamin, Stempfel, Guillaume, Torresani, Bruno, Wiesmeyr, Christoph, Onchis, Darian M.
This article deals with the use of optimal lattice and optimal window in Discrete Gabor Transform computation. In the case of a generalized Gaussian window, extending earlier contributions, we introduce an additional local window adaptation technique
Externí odkaz:
http://arxiv.org/abs/1403.2180
We consider the problem of designing spectral graph filters for the construction of dictionaries of atoms that can be used to efficiently represent signals residing on weighted graphs. While the filters used in previous spectral graph wavelet constru
Externí odkaz:
http://arxiv.org/abs/1311.0897
Publikováno v:
In Applied and Computational Harmonic Analysis November 2019 47(3):975-1013
Autor:
Ricaud, Benjamin, Stempfel, Guillaume, Torrésani, Bruno, Wiesmeyr, Christoph, Lachambre, Hélène, Onchis, Darian
Gabor analysis is one of the most common instances of time-frequency signal analysis. Choosing a suitable window for the Gabor transform of a signal is often a challenge for practical applications, in particular in audio signal processing. Many time-
Externí odkaz:
http://arxiv.org/abs/1310.8573
The Discrete Gabor Transform (DGT) is the most commonly used transform for signal analysis and synthesis using a linear frequency scale. It turns out that the involved operators are rich in structure if one samples the discrete phase space on a subgr
Externí odkaz:
http://arxiv.org/abs/1307.4569
Publikováno v:
Journal of Numbers, Volume 2014, Article ID 491428
We deduce a simple representation and the invariant factor decompositions of the subgroups of the group $\Bbb{Z}_m \times \Bbb{Z}_n$, where $m$ and $n$ are arbitrary positive integers. We obtain formulas for the total number of subgroups and the numb
Externí odkaz:
http://arxiv.org/abs/1211.1797
Autor:
Garn Heinrich, Kohn Bernhard, Wiesmeyr Christoph, Dittrich Klaus, Wimmer Markus, Mandl Magdalena, Kloesch Gerhard, Boeck Marion, Stefanic Andrijana, Seidel Stefan
Publikováno v:
Current Directions in Biomedical Engineering, Vol 3, Iss 2, Pp 829-833 (2017)
In polysomnography, an oronasal thermal airflow sensor and respiratory inductance plethysmography (RIP) belts at thorax and abdomen are used to detect central sleep apnoea. These sensors are uncomfortable to wear, can disturb the patient’s sleep, a
Externí odkaz:
https://doaj.org/article/d66c542d7bcb4dca963b3bcf44ddc082
Autor:
Bar-Lev, Shaul K., Boxma, Onno, Stadje, Wolfgang, Van der Duyn Schouten, Frank A., Wiesmeyr, Christoph
Publikováno v:
In European Journal of Operational Research 2009 198(3):859-866