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Πλοήγηση ανά Θέμα "Parallelizations"

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    • Adaptive Tile Parallelization for Fast Video Encoding in HEVC 

      Koziri M., Papadopoulos P.K., Tziritas N., Dadaliaris A.N., Loukopoulos T., Khan S.U., Xu C.-Z. (2017)
      As large multimedia providers rely more and more on Cloud resources to perform video coding and transcoding, designing fast and efficient coders that take advantage of parallelization, particularly for the new video standard ...

    • Bayesian uncertainty quantification and propagation in molecular dynamics simulations 

      Angelikopoulos, P.; Papadimitriou, C.; Koumoutsakos, P. (2012)
      A comprehensive Bayesian probabilistic framework is developed for quantifying and calibrating the uncertainties in the parameters of the models (e.g. force-field potentials) involved in molecular dynamics (MD) simulations ...

    • Domocus: Lock free parallel legalization in standard cell placement 

      Oikonomou P., Koziri M.G., Dadaliaris A.N., Loukopoulos T., Stamoulis G.I. (2017)
      In the cell placement problem a circuit's cells must be placed within a specified chip area so that they are row aligned and contain no overlaps. The problem is usually tackled in phases, whereby in the first phase a global ...

    • Evaluating the Effects of Modern Storage Devices on the Efficiency of Parallel Machine Learning Algorithms 

      Akritidis L., Fevgas A., Tsompanopoulou P., Bozanis P. (2020)
      Big Data analytics is presently one of the most emerging areas of research for both organizations and enterprises. The requirement for deployment of efficient machine learning algorithms over huge amounts of data led to ...

    • On the Evaluation of Coarse Grained Parallelism in AV1 Video Coding 

      Papadopoulos P.K., Koziri M.G., Tziritas N., Loukopoulos T., Anagnostopoulos I., Šaloun P., Andrešić D. (2018)
      Video compression is arguably one of the most time consuming tasks, especially at high resolutions. For this reason parallelization has been used at various levels: from coarse grained schemes that consider groups of blocks ...

    • Review and comparative analysis of parallel video encoding techniques for VVC 

      Belememis P., Panagou N., Loukopoulos T., Koziri M. (2020)
      In this paper we review and summarize research results concerning video encoding parallelization, with a primary focus on medium and fine grained methods that operate at block or inner block levels. Taxonomies are illustrated ...

    • Selective inversion of inductance matrix for large-scale sparse RLC simulation 

      Apostolopoulou, I.; Daloukas, K.; Evmorfopoulos, N.; Stamoulis, G. (2014)
      The inverse of the inductance matrix (reluctance matrix) is amenable to sparsification to a much greater extent than the inductance matrix itself. However, the inversion and subsequent truncation of a large dense inductance ...

    • Slice-based parallelization in HEVC encoding: Realizing the potential through efficient load balancing 

      Koziri M., Papadopoulos P., Tziritas N., Dadaliaris A.N., Loukopoulos T., Khan S.U. (2017)
      The new video coding standard HEVC (High Efficiency Video Coding) offers the desired compression performance in the era of HDTV and UHDTV, as it achieves nearly 50% bit rate saving compared to H.264/AVC. To leverage the ...

    • Tile Based Wavefront Parallelism in HEVC 

      Papaioannou G.I., Koziri M.G., Papadopoulos P.K., Loukopoulos T., Anagnostopoulos I. (2020)
      High Efficiency Video Coding (HEVC) was developed to tackle the 4K resolution era, achieving up to 50% more compression efficiency (for the same video quality) compared to its predecessor H.264/AVC. However, this performance ...