Mobile video communication from a mountain top
Imagine being able to communicate with video images anywhere in the world. Regardless of the connection you still have a good image of the person you are communicating with. Ulrik Söderström from Digital Media Lab, Umea university, has developed a technique that enables this.
This is a technique that can be used by reporters in remote locations to give live reports and by everyday people, regardless of their location. The technique is so powerful that it is possible to use video with HDTV-quality and transmit it over the regular cellular phone network.
The equipment that is used today is a backpack with a video camera mounted on a bar in front of the person wearing it or a small camera mounted on a helmet.
In the near future the equipment can be so small that it is like using a hands-free, but in this case for video communication, says Ulrik Söderström.
His research regards video and how you can compress the images so that they can be transmitted over any kind of connection while still maintaining high image quality.
A large part of our communication is non-verbal, for example the facial expressions and body language of the person we are communicating with. When we can't se each other a large part of what we are mediating is lost, explains Ulrik Söderström.
His technique makes use of video areas that are classified as important, for example the mouth and the eyes. From changes in these areas and by using a model of the person's face Ulrik can reconstruct a movie in a way that the compressed video needs very little space and at the same time retains high image quality. This means that the sender isn't dependent on fast connections and can use any kind of network for producing good image quality. Video can be transmitted at as low bitrate as 5 kbps, which can be compared to audio via the regular cellular phone network that needs almost 10 kbps.
Ulrik Söderström defends his thesis Very Low Bitrate Video Communication: A Principal Component Analysis Approach on Friday the 26th of September.
The dissertation is held at 10.00 in N200, Naturvetarhuset, Umea University.
Faculty opponent is Professor Luis Torres, Department of Signal Theory and Communications, Universitat Politècnica de Catalunya, Barcelona, Spain.
For further information, please contact
Telephone: +46 (0)90-7869991
Karin Wikman | idw
More articles from Information Technology:
Drones that drive
27.06.2017 | Massachusetts Institute of Technology, CSAIL
Ahead of the Curve
27.06.2017 | Institute of Science and Technology Austria
The most recent press releases about innovation >>>
Die letzten 5 Focus-News des innovations-reports im Überblick:
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...