55 research outputs found
Proceedings of the second "international Traveling Workshop on Interactions between Sparse models and Technology" (iTWIST'14)
The implicit objective of the biennial "international - Traveling Workshop on
Interactions between Sparse models and Technology" (iTWIST) is to foster
collaboration between international scientific teams by disseminating ideas
through both specific oral/poster presentations and free discussions. For its
second edition, the iTWIST workshop took place in the medieval and picturesque
town of Namur in Belgium, from Wednesday August 27th till Friday August 29th,
2014. The workshop was conveniently located in "The Arsenal" building within
walking distance of both hotels and town center. iTWIST'14 has gathered about
70 international participants and has featured 9 invited talks, 10 oral
presentations, and 14 posters on the following themes, all related to the
theory, application and generalization of the "sparsity paradigm":
Sparsity-driven data sensing and processing; Union of low dimensional
subspaces; Beyond linear and convex inverse problem; Matrix/manifold/graph
sensing/processing; Blind inverse problems and dictionary learning; Sparsity
and computational neuroscience; Information theory, geometry and randomness;
Complexity/accuracy tradeoffs in numerical methods; Sparsity? What's next?;
Sparse machine learning and inference.Comment: 69 pages, 24 extended abstracts, iTWIST'14 website:
http://sites.google.com/site/itwist1
Low-Complexity 3D-DWT video encoder applicable to IPTV
3D-DWT encoders are good candidates for applications like professional video editing,
IPTV video surveillance, live event IPTV broadcast, multispectral satellite imaging, HQ
video delivery, etc., where a frame must be reconstructed as fast as possible. However,
the main drawback of the algorithms that compute the 3D-DWT is the huge memory
requirement in practical implementations. In this paper, and in order to considerably
reduce the memory requirements of this kind of video encoders, we present a new
3D-DWT video encoder based on (a) the use of a novel frame-based 3D-DWT transform
that avoids video sequence partitioning in Groups Of Pictures (GOP) and (b) a very fast
run-length encoder. Furthermore, an exhaustive evaluation of the proposed encoder
(3D-RLW) has been performed, analyzing the sensibility of the ¿lters employed in the
3D-DWT transform and comparing the evaluation results with other video encoders in
terms of R/D, coding/decoding delay and memory consumptionThanks to Spanish Ministry of Education and Science under grants DPI2007-66796-C03-03 for funding.López ., O.; Piñol ., P.; Martinez Rach, MO.; Perez Malumbres, MJ.; Oliver Gil, JS. (2011). Low-Complexity 3D-DWT video encoder applicable to IPTV. Signal Processing: Image Communication. 26(7):358-369. https://doi.org/10.1016/j.image.2011.01.008S35836926
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