Dipl.-Ing. Gediminas Simkus

  Gediminas Simkus
Visitor address
Gebäude H3
Holstenhofweg 85
22043 Hamburg
Postal address
Fakultät für Elektrotechnik
Allgemeine Nachrichtentechnik
Postfach 70 08 22
22008 Hamburg


Research projects

Robust audio codec overview

  • Error robust linear predictive filtering
  • Delay-free audio coding
  • Ultra-low delay audio coding

Convolutional neural network layer structure

  • Deep Learning
  • Neural Networks
  • Convolutional Neural Networks

Ship classification example

  • Automated object detection and classification system on the maritime environment
  • Regions of interest (ROI) and object detection
  • Feature extraction and generation
  • Classification of objects
  • Machine learning

Sperm whale number estimation
Sperm whale number estimation

Automated PAM system
Click and echo vocalization detection and extraction
Estimating the number of sperm whale by separating clicks from monaural signals


C. A. de Obaldia Pastor, G. Simkus, U. Zölzer: Estimating the number of sperm whale (Physeter sp.) individuals based on grouping of corresponding clicks, 41. Deutsche Jahrestagung für Akustik (DAGA 2015), March 2015, Nuremberg, Germany.

G. Simkus, M. Holters, U. Zölzer: Error resilience enhancement for a robust ADPCM audio coding scheme, Proceedings of the 39th IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), May 2014, Florence, Italy. [Audio Examples]

G. Simkus, M. Holters, U. Zölzer: Error robust delay-free lossy audio coding based on ADPCM, Proceedings of the 16th Int. Conference on Digital Audio Effects (DAFx-13), September 2013, Maynooth, Ireland. [Audio Examples]

G. Simkus, M. Holters, U. Zölzer: Ultra-low latency audio coding based on DPCM and block companding, Proceedings of the 14th International Workshop on Image and Audio Analysis for Multimedia Interactive Services (WIAMIS) 2013, July 2013, Paris, France.

G. Simkus, M. Holters, U. Zölzer: Ultra-low delay lossy audio coding using DPCM and block companded quantization, Australian Communications Theory Workshop (AusCTW) 2013, January 2013, Adelaide, Australia.

Other public presentations

P. Bhattacharya, G. Simkus, C. de Obaldía, A. Kelm, U. Zölzer: Convolutional Neural Networks for Digital Signal Processing, LSA2017 – Lübeck Summer Academy on Medical Technology, July 2017, Lübeck, Germany.

Gediminas Simkus, U. Zölzer: Automated detection and classification of objects in the maritime environment, ATLAS MEETS SCIENCE – science conference, October 2016, Bremen, Germany.


Informationstechnisches Projekt (Part 1, 2013)

Supervised student thesis

E. Göksügür, Horizon line detection in maritime Images, Project Work, 2017

R. Aldana, Classification with CNN and exploitation of detection information, Project Work, 2017

F. Peemüller, Segmentierung von Schiffsbildern mittels Merkmalextraktion und Klassifikation, Master Thesis, 2016

L. Fu, Maritime objects classification using Exemplar-SVMs, Student Project Work, 2016

T. Maring, Audio quality and evaluation tool for comparison of predictive audio coding schemes, Master Thesis, 2013

M. Smirnou, Audio coding using BCDPCM with pre- and post-filtering, Project Work, 2013

S. Mosanu, Audio coding using recursively indexed ADPCM, Project Work, 2013


Letzte Änderung: 22. October 2019