Research Activities in Coding & Visual Communication

The Coding and Visual Communication Technology Group focuses on error-correcting coding in digital communication and image and video coding in visual communication technology

Error-correcting coding in digital communication 

Advanced error-correcting coding is useful for both core and access networks. All present wireless systems apply error-correction and they would not be possible without. In optical communication, it is becoming a strategic discipline for high capacity transmission where new codes will be tailored to the properties of the transmission line. We conduct research theoretically and in applications of codes and techniques such as product codes (e.g. BCH component codes), soft-decision iterative decoding and concatenated codes. One goal is to push the communication systems to the limits of the available resources to meet the ever increasing demands for data transmission. Towards this goal we carry out analysis of capacity of communication systems based on information theory and design advanced realizations approaching the capacity, e.g. for optical communication including the non-linear regime. We study these issues in the newly established DNRF Centre of Excellence for Silicon Photonics for Optical Communication (SPOC). Within SPOC, we focus on the FT C activities on Information theory, Capacity and Advanced coding.

The research here is focused within the following main activities:

  • error-correcting decoding algorithms - design and implementation 
  • receiver design
  • advanced coding, modulation and transmission systems using iterative decoding/reception
  • information theoretic capacity of communication systems, e.g. optical communication 
  • application of coded systems in satellite communication
  • application of high-speed forward error-correcting coding (FEC) in optical communication

Further details for these activities are given here.

Image and video coding in visual communication

The image and video coding activities are directed towards visual communication technology and systems where a variety of image and video data need to be coded efficiently for optimal quality and use of the available communication bandwidth. The transmission of video and visual data in general is often a driving force for new broadband systems. New visual data as multiview e.g. for 3D and freeview TV and beyond this light field images and video will increase data rates even further. Different aspects of efficient processing, coding and distribution of the visual data are researched within the group addressing issues in the full signal path from capture to display. Energy efficiency is an important issue we are researching both in transmission and display of video data. As application we have a research project on energy efficient video drone based inspection of energy leakages in energy systems. In most multimedia applications it is the end user human perception of the visual signal which is ultimate goal, this is studied e.g. in relation to video coding and display.

For further information on image and video research activities within the group:

Other examples of research acitivities within the group are:

  • error resilient video coding for wireless communication including drones
  • video and image coding for space applications
  • video coding quality assessment
  • second screen video
  • two-dimensional information theory
  • multiview image and video coding

Contact

Søren Forchhammer
Professor, Group Leader
DTU Fotonik
+45 45 25 36 22