Field of Interest Statement
Further information on the Signal Processing Society can be found on the Society's website.
Events
Content-Adaptive Efficient Resource Allocation for Packet-Based Video Transmission
Date: 12 December 2008Time: 17:00-18:00
Location: De Montfort University, Queens Building, Room: 1.12
Lecturer: Aggelos K. Katsaggelos
http://ivpl.eecs.northwestern.edu/people/akatsaggelos
Professor
Department of EECS
Northwestern University
Evanston, Illinois
Abstract: Supporting video communication over lossy channels such as wireless networks and the Internet is a challenging task due to the stringent quality of service (QoS) required by video applications and the many channel impairments. Two important QoS characteristics for video are the degree of signal distortion and the transmission delay. Another important consideration is the cost associated with transmission, for example, the energy consumption in the wireless channel case and the cost for differentiated services in the Internet (with DiffServ) case.
In this presentation we consider the joint adaptation of the source coding parameters, such as the quantization step-size and prediction mode, along with the physical layer resources, such as the transmission rate and power. Our goal is to provide acceptable QoS while taking into account system constraints such as the energy utilization. We conclude the presentation with some of the grand opportunities and challenges in designing and developing video communication systems.
All welcome (members and non-members) - no booking required
Past Events
Wireless Networked Appliances
Date: 24 January 2007 at 1pmSpeaker: Prof. Madjid Merabti
From: Networked Appliances Laboratory, Liverpool John Moores University
Location: Queens building Q1.12, De Montfort University, Leicester
In recent years, with the growth of home appliance usage and wireless communications, networked devices will become more widely used in more diverse applications than ever before. This widespread adoption will require new and novel platforms to abstract the difficulties associated with the exploitation of devices and help overcome the inherent limitations associated with bespoke development. New platforms will need to harness the interactions between devices allowing emergent behaviour to surface, whereby high-level applications are created from low-level compositions. Combining the devices we own to create new applications or provide services is challenging and there is a need to reduce the cognitive demands placed on specialists and home users alike. This will allow for better exploitation of devices and provide obvious benefits to the end user. In this talk we presented a framework for managing devices and their services within wireless home environments.
Recent and Forthcoming Developments in 3G Mobile Communications
Date: 1 February 2007 at 1pmSpeaker: David Mulvey
From: Telecommunications Solutions Division, LogicaCMG
Location: Queens building Q0.15, De Montfort University, Leicester
The potential impact of VoIP and alternative forms of wireless communication (WiFi, WiMAX) have brought mobile networks to arguably their most significant turning point since the decision to proceed with 3G. This talk looked at current developments in 3G and related technologies including HSDPA, mobile TV, WiFi/WiMAX, fixed-mobile convergence and IMS, and discusses the business and implementation factors likely to influence the future development of mobile networks over the next 5-10 years.
See lecture notice.
Dimensionality Reduction and Distributed Estimation using Wireless Sensor Networks with Noisy Links
Date: 20 February 2007 at 2pmSpeaker: Prof. G. B. Giannakis
From: University of Minnesota
Location: Gabor room (611), 6th Floor, Department of Electrical and Electronic Engineering, Imperial College, London
Wireless sensor networks deployed to perform surveillance and monitoring tasks have to operate under stringent power and bandwidth limitations. These motivate well distributed compression and estimation scenarios based on reduced dimensionality sensor observations which may have to be severely quantized before transmission to a fusion center in a star topology. We will show how canonical correlations and distributed principal component analysis can be used to compress observations and explore the fundamental information-theoretic limits dictated by distortion-rate analysis in this decentralized estimation setup. If time allows, we will also present a convex optimization framework for distributed estimation of deterministic, random, and dynamical processes in an ad hoc wireless sensor network topology with noisy links.
Dimensionality Reduction and Distributed Estimation using Wireless Sensor Networks with Noisy Links
Date: 21 February 2007 at 1pmSpeaker: Prof. G. B. Giannakis
From: University of Minnesota
Location: Queens building Q1.12, De Montfort University, Leicester
Wireless sensor networks deployed to perform surveillance and monitoring tasks have to operate under stringent power and bandwidth limitations. These motivate well distributed compression and estimation scenarios based on reduced dimensionality sensor observations which may have to be severely quantized before transmission to a fusion center in a star topology. We will show how canonical correlations and distributed principal component analysis can be used to compress observations and explore the fundamental information-theoretic limits dictated by distortion-rate analysis in this decentralized estimation setup. If time allows, we will also present a convex optimization framework for distributed estimation of deterministic, random, and dynamical processes in an ad hoc wireless sensor network topology with noisy links.
Dynamic energy-saving technology for mobile phones and other handheld electronic appliances
Date: Wednesday 28 March 2007, 1 pmPresenter: Andy Barth
From: Freescale Semiconductor UK
Location: Queens Building, Q1.12, De Montfort University, Leicester
Abstract: Despite gradual improvements in battery technology and the promise soon of fuel cells the ‘battery’ is still – and is likely to remain - the largest and heaviest component in a modern mobile phone. These and similar handheld appliances have demanding multimedia application programs and devices like large colour LCD panels that consume more power than ever. This talk summarizes the problems faced by IC designers and the circuit-level power-saving mechanisms they create to help address the ‘energy gap’. Exploiting these mechanisms effectively often requires ‘intelligent’ algorithms – usually in software - like run-time performance and idle-time prediction. Finally, we see how abstract system modelling followed by software prototyping were used in a project to create a practical energy-saving ‘engine’ - to be deployed in next-generation mobile phones - which seeks dynamically to maximize the energy efficiency of the system and thereby greatly extend useful battery operating times.
See lecture presentation.
Visual Information Engineering 2007
Date: 25-27 July 2007Location: Royal Statistical Society, London
The Chapter co-sponsored this conference.
The 4th IET Visual Information Engineering 2007 Conference (VIE2007) addressed the fundamental elements
of image, video and graphics research and development.
This years event focused on the key technical areas include the growing convergence of computer graphics
and computer vision/image processing which is an increasingly important area in commercial multimedia
applications development.
Full details can be found on the Conference website.
Fountain Codes - amazing codes for erasure channels
Date: Thursday 10 January 2008Location: De Montfort University, Leicester
Room: Queens Building - Room Q1.12
Speaker: Professor David MacKay, Department of Physics, University of Cambridge
Synopsis
In this talk Professor David MacKay will explain fountain codes, which are record-breaking codes for reliable communication over channels with erasures. Channels with erasures are of great importance. For example, files sent over the internet are chopped into packets, and each packet is either received without error or not received. Standard methods involve retransmissions of the erased packets. Fountain codes offer a much more efficient and elegant solution that requires no feedback channel from receiver to sender.
Fountain codes have a remarkable property: they are "rateless", and automatically perform near the capacity of any channel, whatever the statistics of erasures.
For further information, view the event poster.
WiMAX: A Revolution or Evolution?
Date: 28 February 2008Location: De Montfort University, Leicester
Speaker: Professor Garik Markarian, Department of Communication Systems, University of Lancaster, Lancaster, UK
Synopsis
It appears that future wireless broadband communication systems will be compliant with one of the 2 emerging standards: IEEE802.16x or LTE. The LTE is in the earlier stage of development, while the IEEE802.16e systems are already deployed worldwide. In this presentation we will look into the IEEE802.16x standard and its derivative, known as WiMAX specification. We describe various deployment scenarios, both the PHY and MAC layers, and challenges that still exist. Finally, research projects currently carried out at Lancaster will be outlined.
For further information, view the event poster.
Search and Retrieval in 3D Model Data Bases
Date: 28 July 2008Location: De Montfort University, Leicester
Speaker: Prof. Dietmar Saupe (University of Konstanz, Germany)
Synopsis
Digital 3D models are becoming increasingly important in many applications. With current 3D scanners and 3D modeling tools, it has become common to generate 3D content. Thus, in the last decade, techniques for content based search of 3D models have been developed. In this talk, I will present an introduction to the problem and outline the requirements and implications for the most common and successful approach, i.e., using feature vectors for 3D shape. I will present some results of empirical studies and point out open research problems.
For further information, view the event poster.
Analog Signal Processing Conference (ASP2008)
Date: 12 November 2008Location: Oxford Brookes
This biennial event on analogue signal processing is being held as usual this year in Oxford, on the 12th November. The exciting programme includes a keynote speech on 'Bio-inspired Electronics - Towards Personalised Healthcare' by Professor Chris Toumouzou, FRS of Imperial College, together with a wide range of papers on analog design from academia and industry.
This programme provides a stimulating range of material within the analog landscape in a one day conference at very reasonable cost and is also easily accessible for those working in the UK. It is believed that this is the first time that a fellow of the Royal Society has presented at a conference on analog design.
For further information, see the conference website.
News
The photo below shows Professor William Webb, the head of research and development at the regulator Ofcom, visiting the Wireless and Multimedia Communications and Signal Processing (WMCSP) group in the School of Engineering and Technology at De Montfort University, Leicester, on 17/01/2007. Professor Webb is responsible for guiding Ofcom’s approach to new technologies. The WMCSP group is led by Professor Marwan Al-Akaidi who is also Head of the School of Engineering and Technology and Chairman of the IEEE UKRI Signal Processing Chapter. At the meeting, research projects carried out within the WMCSP group were presented. These projects include work on mobile ad-hoc networks, software radio, frequency spectrum optimization, and rate-distortion optimized video streaming. From left to right: Dr Mohamed Aziz, Professor Marwan Al-Akaidi, Professor William Webb, Mr Jon Ivens, Dr John Gow, Professor Raouf Hamzaoui, and Dr Scott Linfoot.
The photo below shows David Mulvey visiting the School of Engineering and Technology at De Montfort University, Leicester, on February 1st 2007. In this event organized by the IEEE UKRI Signal Processing Chapter, David Mulvey gave a seminar on the recent and forthcoming developments in 3G mobile communications. David Mulvey is a senior project manager in the Telecommunications Solutions Division at LogicaCMG. He has in-depth experience of implementing GPRS and 3G mobile networks as well as IT solutions for mobile communications. He is a Fellow of the IET and has been involved in organizing several meetings including the recent series of annual conferences on 3G. From left to right, Professor Raouf Hamzaoui, Professor Marwan Al-Akaidi (Chairman of the IEEE UKRI Signal Processing Chapter and head of the school of Engineering and Technology at De Montfort University), David Mulvey.
Committee
Chairman
Professor Marwan Al-AkaidiFaculty of Computing Sciences & Engineering
De Montfort University, Leicester, LE1 9BH
Tel/Fax: 0116 257 7098, 07884 235159 (M)
email:
Professional activities and links
Prof. Raouf HamzaouiFaculty of Computing Sciences & Engineering
De Montfort University, Leicester, LE1 9BH
email:
e-mail Chairman for further details about the Chapter.
Society Website
Further details about the parent Society can be found on the IEEE Signal Processing Society website.
