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Multimedia Source Coding
|Flawless Holographic Telepresence... Prof Lajos Hanzo|
In the current research era the community may be expected to turn to radical wireless 'tele-presence' research. This requires flawless high-performance audio/video codecs, which are resilient against transmission errors. The resultant stream then has to be error correction coded in order to correct the transmission errors and then transmitted over hostile wireless channels with the aid of bandwidth-efficient, yet low-power-consumption 'green' transmitters and receivers (transceivers) for three-dimensional (3D) audio/video communications.
So-called stereoscopic video systems may be constructed with the aid of a pair of cameras, which are typically mounted on a rigid rig at a distance of the typical human viewer in order to produce images of what the left and right eye would see. The resultant two-channel video stream may then be stored, transmitted and finally viewed with the aid of stereoscopic displays, but the viewers have to wear specially designed goggles.
Some of the related stereoscopic multimedia components are becoming a commercial reality:
Provided that the video source signal is recorded from 9-16 different angles/views, more realistic holographic viewing becomes possible without requiring any goggles:
Our team at Southampton is well equipped with the above-mentioned 3D multimedia components, including a cutting-edge holographic display http://www.holografika.com/Products/HoloVizio-128WLD.html
Since the 16 cameras deliver highly correlated video sequences, it is anticipated that a large amount of the predictable, ie 'redundant' information may be removed with the aid of holographic video compression.
Our further goal is then to investigate the transmission of the holographic information over hostile wireless channels by inflicting realistic channel-induced hologram-corruption and study their visual effects. Then we embark on designing sophisticated counter-measures using error correction coding and concealment for transmission in 3D holographic tele-presence scenarios.
The investigated systems will also be appraised with the aid subjective testing in the context of the Southampton Open Wireless Network. http://www.sown.org.uk
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Authors: Jurgen Streit and Lajos Hanzo
- Quadtree-based Re-configurable Cordless Videophone Systems
J. Streit, L.Hanzo, IEEE Tr. on Circuits and Systems for Video Technology, Apr. 1996, Vol. 6, No. 2, pp 225-237
- Dual-mode Vector-quantised Low-rate Cordless Videophone Systems for Indoors and Outdoors Applications
J. Streit, L.Hanzo, Accepted by the IEEE for publication in the IEEE Tr. on Vehicular Technology
- Adaptive Low-rate Wireless Videophone Schemes
L. Hanzo, J. Streit, IEEE Tr. on Circuits and Systems for Video Technology, Aug. 1995, Vol. 5, No. 4, 305-319, ISSN 1051-8215
- A Fractal Video Communicator,
J. Streit, L.Hanzo, Proc. of IEEE Vehicular Technology Conference (VTC '94), Stockholm, Sweden, 1994, pp 1030-1034
Authors: Peter Cherriman and Lajos Hanzo
- ARQ-assisted H261 and H263-based Programmable Video Transceivers
P. Cherriman, L. Hanzo and R. Lucas in Departmental Research Journal 1995/6 (online)
- Robust H.263 Video Transmission Over Mobile Channels in Interference Limited Environments
P. Cherriman and L. Hanzo, presented at the First International Workshop on Wireless Image/Video Communications, 4-5 September 1996. Loughborough, UK, pp.1-7.
- Power-Controlled H.263-Based Wireless Videophone Performance in Interference-Limited Scenarios
P. Cherriman and L. Hanzo, presented at the 7th IEEE International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), 15-18 October 1996, Taipei, Taiwan, pp. 158-162 (Volume 1).
- H261 and H263-based Programmable Video Transceivers
P. Cherriman and L. Hanzo, presented at IEEE ICCS'96 / ISPACS'96, 25-29 November 1996, Singapore, pp. 1369-1373 (Volume 3).
- Programable H.263-based Wireless Video Transceivers for Interference-limited Environments
P. Cherriman and L. Hanzo, submitted to IEEE transactions on Circuits and Systems for Video Technology Journal.
- Speech Coding by Jason Woodard follow this link
- Graphical Communications by H. Yuen follow this link