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Welcome to the homepage of Dr Christian Ritz!
I am an
Associate Professor in the School of
Electrical, Computer and Telecommunications Engineering at the University of Wollongong,
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Christian graduated from the University of Wollongong
in 1999 with a Bachelor of Electrical Engineering and a Bachelor of Mathematics
and a PhD in Electrical Engineering at the University of Wollongong in 2003.
His PhD research focused on very low bit rate coding of wideband speech using
Waveform Interpolation (WI).
Since
2003, Christian has held a position within the School of Electrical, Computer
and Telecommunications Engineering at the University of Wollongong and is
currently a Senior Lecturer. His is a member of the Visual and Audio
Signal Processing Lab of the Information and Communications Technologies (ICT)
Research Institute.
Current research
interests include single and multichannel speech signal processing, speech and
audio coding, spatial audio signal processing, multimedia Quality of Experience
(QoE) and signal processing for new media services.
Current projects
include spatial and multichannel speech and audio signal processing and
compression, acoustic vectors sensors for sound source localisation and
enhancement, microphone array signal processing, semantic analysis and
processing of multimedia content, perceptual processing and Quality of
Experience (QoE) estimation for media content.
I am a member of the
Visual and Audio Signal Processing Lab, part of the ICT Research Institute. I am also the
director of the University of Wollongong’s anechoic recording and
playback facility.
Publication List (sourced via UOW Database)
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Adaptive signal
processing for enhancing sound field recordings and reproduction. This project
is investigating new approaches to enhancing sound fields recorded by
microphone arrays as well as delivered using loudspeaker arrays.
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Sound field reproduction using directional loudspeaker arrays. This
project is investigating novel approaches to sound field reproduction using directional
loudspeaker arrays.
·
Encoding and
Communicating Navigable Soundfields, C Ritz and Ian Burnett (RMIT University), ARC
Discovery Project, 2010-2012.
·
Acoustic Vector Sensors for Speech Processing
and Enhancement. This project is investigating novel miniature
microphone arrays for sound recording and processing, including speech signal
analysis, localisation and enhancement.
·
Signal
Processing and Quality Of Experience For New Media
Services. This project, sponsored by the Smart Services CRC, is investigating new signal processing technologies
for new media services applications including how to measure the resulting user
Quality of Experience (QoE). A significant outcome
was the development of technology behind the AirLinkTM
iPhone application, which provides a user with the ability to scan a
printed newspaper picture and then automatically receive related digital content
such as a video, picture or web page that is displayed on their phone.
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Spatial Audio
Coding. This project is investigated new techniques for
compression of 3D audio. In particular, a new approach based on spatial squeezing was developed and resulted in compression rates
similar to those used for stereo audio formats when coding 16-channel 3D audio.
·
Microphone
Array Recording and Analysis of Speech. This project investigated
the recording and analysis of multiparty speech recordings using microphone
arrays. The key application was to detect speaker turns in meetings for
automatic labelling of the participants for use within meeting ‘browser’ applications.
· Chao Sun : Motif Recovery in Spatio-Temporal Data Project
· Mohamed Barakat : Keyword Spotting for Social Media Semantics
·
Yi
Cao : User Quality of Experience (QoE) for Interactive Multimedia
·
Chen
Meng : Surround
Sound for Mobile Telephony
· Muhammad Salman Raheel : Peer To Peer Real Time Video Distribution
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Shahab Pasha : Adaptive
Signal Processing for Noise-Robust Speech Processing
·
Jacob
Donley : Spatial Audio Using Innovative Directional Loudspeakers
·
Matthew
Dabin : Optimised Microphone Placement on 3D
Geometry for Speech Enhancement Purposes
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Yuxiao Feng : Adaptive
Analysis and Active Cancellation of Environmental Noise
If
you are interested in joining my research team as a postgraduate research
student you are encouraged to send me an email along with your CV and academic
transcripts.
Information about the application process can be found at the University
postgraduate study page. For information about Scholarships, please see the
University
scholarship page. You might also like to spend time as a visiting
research student.
The following students have graduated
under my supervision:
In addition to my traditional research
activities related to digital signal processing, I am also involved with
research related to engineering education. This has included the completion of
projects investigating the integration of graduate capabilities and outcomes
within the Engineering curriculum including their relationship to professional
accreditation requirements. Research and scholarship in teaching has also included
a focus on the development of professional communication and teamwork skills
within Engineering students.
Grants and Projects:
·
C Ritz, B James, et. al., “Quality
Graduates become Professional Engineers”, ESDF/T&L, 2008.
Current subjects:
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ECTE401/901 Multimedia Signal Processing (Autumn session
2014)
Past subjects:
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ECTE203 Signals and Systems
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ECTE301 Digital Signal Processing
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ECTE171 Electrical Engineering Practice
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ECTE250 Engineering Design and Management 2
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ECTE906 Advanced Signals and Systems
Professional Activities
·
Senior Member of the IEEE
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Member of the Audio Engineering Society
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Member of the International Speech Communications
Association (ISCA)
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Associate Member of The Audio Engineering Society
(AES)
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Member of The Australian Speech Science and Technology
Association (ASSTA)