Articles

Linear predictive perceptual filtering for acoustic vector sensors: exploiting directional recordings for high quality speech enhancement (with Christian H. Ritz and Muawiyath Shujau), Faculty of Engineering - Papers (2011)

This paper investigates the performance of a new technique for speech enhancement which combines Linear...

 
Separation of speech sources using an acoustic vector sensor (with Christian H. Ritz and Muawiyath Shujau), Faculty of Informatics - Papers (2011)

This paper investigates how the directional characteristics of an Acoustic Vector Sensor (AVS) can be...

 

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Efficient multimedia query-by-content from mobile devices (with Kevin Adistambha, Stephen J. Davis, and Christian H. Ritz), Computers & Electrical Engineering (2010)

The phenomenal growth in multimedia content has lead to the development of a variety of...

 
Spatial audio coding by squeezing: analysis and application to compressing multiple soundfields (with Christian H. Ritz and Bin Cheng), Faculty of Informatics - Papers (2009)
 
The effect of microphone directivity patterns on spatial cues for reverberant multichannel meeting speech analysis (with Christian H. Ritz and Eva Cheng), Faculty of Informatics - Papers (2009)
 

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Spatialized teleconferencing: recording and 'Squeezed' rendering of multiple distributed sites (with Christian H. Ritz, Eva Cheng, and Bin Cheng), Faculty of Informatics - Papers (2008)
 

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Reconfigurable Media Coding: Self-Describing Multimedia Bitstreams (with J. Thomas-Kerr, J. Janneck, M. Mattavelli, and C. Ritz), Faculty of Informatics - Papers (2007)

The development of MP3 and JPEG sparked an explosion in digital content on the internet....

 

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The MPEG-7 Query Format: A New Standard in Progress for Multimedia Query by Content (with K. Adistambha, M. Doeller, R. Tous, M. Gruhne, M. Sano, C. Tsinaraki, S. Christodoulakis, Kyoungro Yoon, and C. H. Ritz), Faculty of Informatics - Papers (2007)

ln recent years, the amount of Internet accessible digital audiovisual media files has vastly increased....

 

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MQF: An XML Based Multimedia Query Format (with K. Adistambha and C. H. Ritz), Faculty of Informatics - Papers (2007)

MQF is a new XML based format designed to facilitate communication between disparate systems for...

 

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Principles and Analysis of the Squeezing Approach to Low Bit Rate Spatial Audio Coding (with B. Cheng and C. H. Ritz), Faculty of Informatics - Papers (2007)

This paper presents a novel solution to multichannel spatial audio coding: Spatial Squeezing Surround Audio...

 

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Is That a Fish in Your Ear? A Universal Metalanguage for Multimedia (with J. Thomas-Kerr, C. H. Ritz, S. Devillers, D. de Schrijever, and R. Van de Walle), Faculty of Informatics - Papers (2007)

Universal Multimedia Access promises to adaptively deliver multimedia content to users according to their needs?whether...

 

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Is that a fish in your ear? A universal metalanguage for multimedia (with Joseph A.I. Thomas-Kerr, Christian H. Ritz, Sylvain Devillers, Davy De Schrijver, and Rik Van de Walle), IEEE MultiMedia Magazine (2007)

Developing the code to parse and generate multimedia bitstreams has traditionally been a repetitive and...

 

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Enhancing Interoperability via Generic Multimedia Syntax Translation (with J. Thomas-Kerr and C. H. Ritz), Faculty of Informatics - Papers (2006)

The Bitstream Binding Language (BBL) is a new technology developed by the authors and being...

 

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Facilitating Universal Multimedia Adaptation (UMA) in a Heterogeneous Peer-to-Peer Network (with L. Rong), Faculty of Informatics - Papers (2006)

This paper proposes a P2P architecture which uses MPEG-21 as a standard based technique to...

 

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A Variable Length Linear Array for Smart Antenna Systems using Partial Optimization (with W. Raad), Faculty of Informatics - Papers (2006)

Adaptive arrays have been used extensively in wireless communications applications to reduce interference between desired...

 

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Blind Separation of Speech with a Switched Sparsity and Temporal Criteria (with D. Smith), Faculty of Informatics - Papers (2006)

A blind signal separation algorithm (SCAtemp) that exploits both the sparse time-frequency representation and temporal...

 

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Format-Independent Multimedia Streaming (with J. Thomas-Kerr and C. H. Ritz), Faculty of Informatics - Papers (2006)

The Bitstream Binding Language (BBL) is a new technology developed by the authors and being...

 

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On-Demand Partial Schema Delivery for Multimedia Metadata (with S. J. Davis), Faculty of Informatics - Papers (2006)

XML is a popular approach to interoperable exchange of Multimedia metadata between a wide range...

 

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A Variable Length Linear Array for Smart Antenna Systems (with W. Raad and I. Raad), Faculty of Informatics - Papers (2006)

Adaptive Arrays have been used extensively in wireless communications applications to reduce interference between desired...

 

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Adaptive resource replication in a ubiquitous peertopeer based multimedia distribution environment (with L. Rong), Faculty of Informatics - Papers (2006)

A dynamic P2P architecture was proposed in our previous work to support resource adaptation/personalization according...

 

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BitTorrent in a dynamic resource adapting peer-to-peer network (with L. Rong), Faculty of Informatics - Papers (2005)

Our previous work proposed a MPEG-21 based P2P network architecture supporting resource adaptation on the...

 

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Collaborative Editing using an XML Protocol (with S. J. Davis), Faculty of Informatics - Papers (2005)

XML is a popular approach to interoperable exchange of data between a wide range of...

 

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Improved Dynamic Multimedia Resource Adaptation-based Peer-to-Peer System through Locality-based Clustering and Service (with L. Rong), Faculty of Informatics - Papers (2005)

A dynamic P2P architecture based on MPEG-21 was proposed in our previous work to support...

 

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Blind speech separation using a joint model of speech production (with D. Smith and J. Lukasiak), Faculty of Informatics - Papers (2005)

We propose a new blind signal separation (BSS)technique, developed specifically for speech, that exploits a...

 

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A Protected Digital Item Declaration Language for MPEG-21 (with S. Lauf), Faculty of Informatics - Papers (2005)

Within the MPEG-21 Multimedia Framework, Digital Items are introduced as a structured digital representation for...

 

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A Sequential Approach to Sparse Component Analysis (with D. Smith and J. Lukasiak), Faculty of Informatics - Papers (2005)

A sequential approach to sparse component analysis (SeqTIF) is proposed in this paper. Although SeqTIF...

 

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Efficient Delivery within the MPEG-21 Framework (with S. J. Davis), Faculty of Informatics - Papers (2005)

MPEG-21, the new Multimedia Framework standard is nearing completion. It is centred around the concept...

 

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MPEG-21 in backpack journalism scenario (with G. Drury), Faculty of Informatics - Papers (2005)

The vision of MPEG-21-the multimedia framework-is to enable transparent and augmented use of multimedia resources...

 

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An investigation of temporal modeling in blind signal separation (with D. Smith and J. Lukasiak), Faculty of Informatics - Papers (2005)

This paper investigates the performance of blind signal separation (BSS) algorithms that exploit the temporal...

 

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Bitstream Binding Language – Mapping XML Multimedia Containers into Streams (with J. Thomas-Kerr and P. Ciufo), Faculty of Informatics - Papers (2005)

Bitstream Binding Language (BBL) provides an abstraction layer between XML multimedia containers and the way...

 

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Exchanging XML Multimedia Containers Using a Binary XML Protocol (with S. J. Davis), Faculty of Informatics - Papers (2005)

XML is becoming increasingly popular as the ubiquitous standard for metadata; consequently, it is being...

 

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Using spatial cues for meeting speech segmentation (with E. Cheng, J. Lukasiak, and D. Stirling), Faculty of Informatics - Papers (2005)

This work investigates the validity and accuracy of using spatialcues with Time-Delay Estimation (TDE) as...

 

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MPEG-21 digital item declaration and Identification-principles and compression (with S. J. Davis and G. M. Drury), Faculty of Informatics - Papers (2005)

At the core of the MPEG-21 Multimedia Framework is the concept of the Digital Item,...

 

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Dynamic resource adaptation in a heterogeneous peer-to-peer environment (with L. Rong), Faculty of Informatics - Papers (2005)

This paper focuses on metadata-based, multimedia resource representation and retrieval in a P2P environment as...

 
Implementation of a Mobile MPEG-21 Peer (with Shane Lauf), Faculty of Informatics - Papers (2005)
 

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Role of wavelet transforms in image restoration (with P. Premaratne), Faculty of Informatics - Papers (2004)

Image processing techniques including image restoration rely heavily on discrete Fourier transform (DFT) for frequency...

 

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Blur retrieval via separation of zeros sheets from noisy blurred images (with P. Premaratne and C. D. Liyanage), Faculty of Informatics - Papers (2004)

A novel method of separating the point spread function from blurred images using zeros of...

 

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Dynamic multimedia adaptation and updating of media streams with MPEG-21 (with L. Rong), Faculty of Informatics - Papers (2004)

The paper discusses media streaming using dynamic resource adaptation and update as a means of...

 

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Lie analysis of the Webster horn equation with application to audio object recognition (with T. M. Barrett and J. Lukasiak), Faculty of Informatics - Papers (2003)

The Webster horn equation describes the pressure wave in a duct of slowly varying cross...

 

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MPEG-21: goals and achievements (with R. Van de Walle, K. Hill, J. Bormans, and F. Pereira), Faculty of Informatics - Papers (2003)

MPEG-21 is an open standards-based framework for multimedia delivery and consumption. It aims to enable...

 

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Low bit rate wideband WI speech coding (with C. H. Ritz and J. Lukasiak), Faculty of Informatics - Papers (2003)

This paper investigates waveform interpolation (WI) applied low bit rate wideband speech coding. An analysis...

 

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Multi-rate and multi-resolution scalable to lossless audio compression using PSPIHT (with M. Raad and A. Mertins), Faculty of Informatics - Papers (2003)

This paper presents a scalable to lossless compression scheme that allows scalability in terms of...

 

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Scalable speech coding spanning the 4 Kbps divide (with J. Lukasiak), Faculty of Informatics - Papers (2003)

This paper examines a scalable method for coding the LP residual. The scalable method is...

 

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Scalable to lossless audio compression based on perceptual set partitioning in hierarchical trees (PSPIHT) (with M. Raad and A. Mertins), Faculty of Informatics - Papers (2003)

This paper proposes a technique for scalable and also provides for lossless compression. It reduces...

 

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Universal multimedia experiences for tomorrow (with F. Pereira), Faculty of Informatics - Papers (2003)

The previous decade has seen a variety of trends and developments in the area of...

 

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MPEG-21: Goals and Achievements (with R. van de Walle, K. Hill, J. Bormans, and F. Pereira), IEEE Multimedia (2003)

The goals and achievements of MPEG-21, an open standards-based framework for multimedia delivery consumption, are...

 

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Extending waveform interpolation to wideband speech coding (with C. H. Ritz and J. Lukasiak), Faculty of Informatics - Papers (2002)

This paper investigates the extension of waveform interpolation (WI) to wideband speech coding. Included is...

 

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Scalable decomposition of speech waveforms (with J. Lukasiak), Faculty of Informatics - Papers (2002)

Decomposition of speech signals into periodic and noise components is widely used in speech coding...

 

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Spanning the 4 kbps divide using pulse modeled residual (with J. Lukasiak), Faculty of Informatics - Papers (2002)

This paper reports a scalable method for coding the LP residual. The scalable method is...

 

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The analysis of speech codecs using psychoacoustic measures (with M. Raad, C. H. Ritz, and A. Mertins), Faculty of Informatics - Papers (2002)

This paper analyses two narrowband speech codecs, the 4.8 kbit/s FS1016 coder and the 8...

 

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Fuzzy clustering evaluation of time-frequency distribution (TFD) schemes for audio stream segregation (with M. A. Jackson), Faculty of Informatics - Papers (2001)

Audio stream segregation is a task performed constantly by the human auditory system, yet is...

 

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Scalable audio coding employing sorted sinusoidal parameters (with M. Raad and A. Mertins), Faculty of Informatics - Papers (2001)

This paper describes the use of sorted sinusoidal parameters to produce a fixed rate, scalable,...

 

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Low rate WI SEW representation using a REW-implicit pulse model (with J. Lukasiak), Faculty of Informatics - Papers (2001)

Reducing the bit rate of waveform interpolation speech coders while maintaining the perceptual quality has...

 

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Audio coding using sorted sinusoidal parameters (with M. Raad), Faculty of Informatics - Papers (2001)

This paper describes a new audio coding scheme based on sinusoidal coding of signals. Sinusoidal...

 

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Sew Representation for Low Rate WI Coding (with J. Lukasiak), Faculty of Informatics - Papers (2001)

This paper considers low-rate waveform interpolation (WI) coding. It compares the existing, common slowly evolving...

 

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Temporal decomposition for low rate wideband speech compression (with C. H. Ritz), Faculty of Informatics - Papers (2001)

An investigation into low bit rate wideband speech coding for applications such as unicast streaming...

 

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Exploiting simultaneously masked linear prediction in a WI speech coder (with J. Lukasiak), Faculty of Informatics - Papers (2000)

This paper uses a method of incorporating simultaneous masking into the calculation of a linear...

 

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Exploring the characteristics of analytic decomposition of speech signals (with J. Lukasiak), Faculty of Informatics - Papers (2000)

This paper investigates the properties of analytic transformation of speech into envelope and phase functions....

 

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Improved signal analysis and time-synchronous reconstruction in waveform interpolation coding (with N. R. Chong-White), Faculty of Informatics - Papers (2000)

This paper presents a waveform-matched waveform interpolation (WMWI) technique which enables improved speech analysis over...

 

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Very low rate speech coding using temporal decomposition and waveform interpolation (with C. H. Ritz and J. Lukasiak), Faculty of Informatics - Papers (2000)

In very low rate coding the aim is to accurately represent speech characteristics as efficiently...

 

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Accurate, critically sampled characteristic waveform surface construction for waveform interpolation decomposition (with N. R. Chong-White), Faculty of Informatics - Papers (2000)

A waveform-matched waveform interpolation (WMWI) technique is presented which offers improved signal analysis over standard...

 

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Linear prediction incorporating simultaneous masking (with J. Lukasiak, J. F. Chicharo, and M. M. Thomson), Faculty of Informatics - Papers (2000)

Whilst linear prediction is the cornerstone of most modern speech coders, few of these coders...

 

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A new waveform interpolation coding scheme based on pitch synchronous wavelet transform decomposition (with N. R. Chong and J. F. Chicharo), Faculty of Informatics - Papers (2000)

This correspondence uses a pitch synchronous wavelet transform (PSWT) as an alternative characteristic waveform decomposition...

 

Contributions to Books

Enhancing multimedia search using human motion (with Kevin Adistambha, Stephen Davis, Christian Ritz, and David Stirling), Faculty of Informatics - Papers (2012)

Over the last few years, there has been an increase in the number of multimedia-enabled...

 
What are you trying to say? Format-independent semantic-aware streaming and delivery (with Joseph Thomas-Kerr and Christian Ritz), Faculty of Informatics - Papers (2011)
 

Presentations

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An anechoic configurable hemispheric environment for spatialised sound (with Christian H. Ritz, Gregory M. Schiemer, Eva Cheng, Damien Lock, Terumi Narushima, Stephen F. Ingham, and Diana Wood Conroy), Faculty of Creative Arts - Papers (2008)
 

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Encoding higher order ambisonics with AAC (with Erik Hellerud, Audun Solvang, and U Peter Svensson), Faculty of Engineering - Papers (2008)

In this work we explore a simple method for reducing the bit rate needed for...

 

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Intelligent Multimedia Delivery? It’s a question of semantics (with J. Thomas-Kerr and C. Ritz), Faculty of Informatics - Papers (2007)

Intelligent multimedia delivery uses semantic information about content to enhance the delivery process. This paper...

 

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Format-independent multimedia streaming (with Joseph Thomas-Kerr and Christian H. Ritz), IEEE International Conference on Multimedia and Expo (2006)

The Bitstream Binding Language (BBL) is a new technology developed by the authors and being...

 

Other

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Convolutional Interleaver for Unequal Error Protection of Turbo Codes (with Sina Vafi and Tadeusz A. Wysocki), Computer & Electronics Engineering Faculty Publications (2003)

This paper describes construction of a convolutional interleaver as a block interleaver and discusses its...