| EPSRC Reference: |
GR/J91777/01 |
| Title: |
EXTENSION OF BALANCED MODEL REDUCTION TECHNIQUES FOR FLEXIBLE DIGITAL FILTER DESIGN |
| Principal Investigator: |
Cain, Professor G |
| Other Investigators: |
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| Researcher Co-Investigators: |
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| Project Partners: |
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| Department: |
Sch of Electronics and Computer Science |
| Organisation: |
University of Westminster |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
01 September 1994 |
Ends: |
28 February 1998 |
Value (£): |
121,567
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| EPSRC Research Topic Classifications: |
| Digital Signal Processing |
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Summary on Grant Application Form |
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(i) Study impact of co-efficient quantization on preliminary FlR-to-llR filter conversion processes and devise approaches for retaining the fullest fidelity consistent with effective reduction of dimensionality.ii) Investigate a range of useful expansions (including complex and 2-d) of BMT capability for fixed filters.(iii) Deploy basic algorithm in an adaptive role, exploring novel sizing and resolution changes during adaption.Progress:The Projects Workstation has been ordered, received and is now in service, alongside other equipment for audio band signal capture and experimentation. The project Team is now complete, and consists of a full-time Research Officer (in post starting in September), a part-time PhD student engaged in refinement of a preliminary software package for support of balanced model truncation/optimization,Mr. l. Kale (Co-lnvestigator, in operational charge of the Project) and the Principal Investigator. Dr. G.H. Allen is also collaborating in the work. The first few months have seen the Research Officer, Dr. J.P. Mackenzie, gaining a full understanding of background developments and in determining several near-term goals. The initial focus is to be toward finite wordlength effects, with selected applications being explored in parallel.To date, one specimen filter has been successfully reduced as an experiment for an industrial firm with a demanding instrumentation problem; in addition, a filter for use in a codec for GSM usage has been reduced as part of a consultancy task for a British firm and is now in service on silicon. More directly aligned with this research programme, audio experiments aimed at acoustic reverberation modelling and control, along with LPC drum sound modelling have commenced. Already the drum sound work has revealed that Balanced Model Reduction offers improvements over conventional ARMA modelling and this has been reported [1], [2]. It is expected that physical modelling of musical instruments will prove a fruitful applications adjunct to illustrate and exercise the theoretical research also underway and now gathering momentum. [1] Mackenzie, J.P., I. Kale, G. Cain, ARMA modelling of musical instrument sounds via Balanced Model Truncation , submitted to ECCTD 95.[2] Mackenzie, J.P., I. Kale, G. Cain, Applying Balanced Model Truncation to sound analysis/synthesis models , submitted to the International Computer Music Conference, Canada,1995.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.wmin.ac.uk |