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EPSRC Reference: GR/K18962/01
Title: ROBUST SIGNAL PROCESSING AND RECOGNITION FOR OCCLUDED SPEECH
Principal Investigator: Cooke, Professor M
Other Investigators:
Brown, Professor G Green, Professor PD
Researcher Co-Investigators:
Project Partners:
Department: Computer Science
Organisation: University of Sheffield
Scheme: Standard Research (Pre-FEC)
Starts: 01 January 1995 Ends: 31 December 1997 Value (£): 109,617
EPSRC Research Topic Classifications:
Digital Signal Processing Human Communication in ICT
EPSRC Industrial Sector Classifications:
Related Grants:
Panel History:  
Summary on Grant Application Form
This project aims to demonstrate robust automatic speech recognition (ASR) in arbitrary acoustic backgrounds. Current systems perform unreliably in moderate levels of background noise, levels which present listeners with little difficulty. Our recent work has modelled human auditory grouping principles in order to provide a general answer to the question of how best to deal with signal occlusion, and we have several solid demonstrations of SNR improvement for a wide variety of acoustic mixtures. The current project aims to apply that work to ASR. In the first stage, we will develop theoretical and algorithmic results to allow the training of a speech recogniser from an incomplete time-frequency description. This will provide a complete bottom-up path from occluded to recognised speech. The second phase of the project aims to provide a feedback route from recognised speech to the segregation process. One mechanism which we believe can bring both bottom-up (data-driven) and top-down (expectation-driven) factors to bear on speech segregation is a scheme using synchronised oscillations between neuronal groups. We intend to implement a computational model of this scheme in order to provide a robust pre-processor for ASA in noise.
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Organisation Website: http://www.shef.ac.uk