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My research strands in MSA

Delve into MSA research areas including speech coding, patient monitoring, implementation, and more. Explore personnel and research themes like DAP-STC and distance learning networks. Discover plans for the future in music analysis and VoWLAN.

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My research strands in MSA

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  1. My research strands in MSA Barry Cheetham Review of past year Plans for future

  2. *Derek Molyneux *Meau Shin Ho Ning Li Li-rong He Lizzie X Ni Yen-ha Hiew Abdul Eshhubi Andrew Earis Tolis Tramantzas Personnel

  3. Research themes • Speech coding (3) • Patient monitoring (1) • Implementation (1) • Distance learning networks (2) • Music analysis (1) • Speech over WLAN (1)

  4. Speech coding for mobile & VoIP • Discrete all-pole modelling applied to speech coding. • Sinusoidal transform coding of speech using DAP. • Variable bit-rate coding using DAP-STC.

  5. Speech personnel

  6. Speech personnel

  7. DAP-STC • 2G GSM uses CELP at 13kb/s+FEC • 3G & IP need AMR down to 2.4kb/s • “Toll” quality • CELP fails at bit-rates below 4kb/s • Use sinusoidal / interpolative coding • DAP more accurate than LPC.

  8. DAP-STC fv fv fv DAP spectral envelope Freq’ncies Compute magntude spectrum Peak-picking Speech input X DFT LSP Amplitudes Window Pitch frequency Pitch & voicing detection Voicing probability (Pv)

  9. Patient monitoring

  10. Monitoring of chronic cough • Collaboration with Wythenshawe & Fazakerley Hospitals. • Recognition of cough waveforms • Elimination of speech/ background • 24 hour monitoring /data storage • GPRS radio link

  11. Cough monitoring(cont) • Speech recognition techniques • Statistical measurements • Participation in trials • Certain medical procedures may be proved misleading

  12. Expulsive phase Mid phase Final burst A COUGH

  13. Low power implementation of DSP for mobile terminals. • Lizzie is here!!

  14. Retargetable compiler for low power on CADRE • Motivation: • New asynchronous DSP core—CADRE • Retargetable compiler support • Speed, code size & power efficiency • Techniques at software level • Research Objectives: • Methodology for C compilation flow for target. • Results so far • Shown to reduce switching activity at circuit level.

  15. Distance learning networks (LiRong) • Real time over fixed or wireless networks • Flow & congestn control for speech/image/data • Based on measurements of delay, jitter, lost packet probability • New ‘RTMTCP’ for distance learning • Dynamic priority assignment • Adapted to on-line tutorials

  16. Distance learning by Internet • Tolis is here!

  17. Musical Analysis: Andrew Earis

  18. Expressive musical performance analysis • Measure intentional variations in the way notes played. • Timing, dynamics, tone quality, vibrato, etc. • Extract from CD with ref to the score in midi form. • Display to augment the score. • Many applications, e.g. practising, analysis, compression • Classical time-frequency analysis problem.

  19. Voice over WLAN • Integrating DECT PABX with OFDM based IEEE802.11 WLAN • Use single band, e.g. 2.4 GHz • Share resources, simplify maint’nce • Modify DECT radio interface & packetise the speech • Operate in ‘contention mode’

  20. Wireless LAN Cordless phone Laptop AP Cordless phone Laptop PDA LAN connection

  21. Principle: OFDM & single carrier

  22. The future • Ning’s & Li-Rong’s theses • Publish DAP-STC work in full • Grant application for cough work • Grants for VoWLAN / Music • Framework 6

  23. Opportunities Framework 6 Collaboration with ASCOM Spectrum Efficiency call (RCA)

  24. Goals for next year • One new student for OFDM work • Two successful PhDs & 1 MSc • At least 1 grant. • 2-3 journal papers + conf.

  25. Publications this year • Two IEEE ICASSP conf. • Two other conf. (Andrew) • One IEE colloquium paper (YH) • 4 medical conf. • COST presentation

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