LEFEBVRE Roch
Eng., Ph. D.
Full professor
Director of Speech and Audio Processing Laboratory
Français
Education
- B. Sc. Physics, McGill University, 1989
- M. Sc. A. electrical engineering, Université de Sherbrooke, 1992
- Ph.D. electrical engineering, Université de Sherbrooke, 1995
Research expertise and domains
- Digital signal processing
- Speech and audio processing
- Speech coding
- Audio compression
- Noise reduction and enhancement algorithms
- Adaptive filtering
- Digital communications
Research Activities
- Robust voice transmission in packet networks and VoIP applications
- Wideband speech coding
- Variable rate speech coding, signal classification
- Universal speech/audio coding, hybrid coding models, low rate audio
- Embedded and multi layer audio coding
- Multi-channel audio coding, parametric coding of spatial audio (5.1 and beyond)
- Multi-microphone noise reduction
Teaching Activities
- 1st year undergraduate : GEL210/GIF230 – Signals and systems
- 3rd year undergraduate : GEL510 – Digital signal processing
- 3rd year undergraduate: GEL530 – Microprocessors
- 4rth year undergraduate : GTA710 : Information coding
- 4rth year undergraduate: GTA720 : Source coding and quantization
- Graduate class GEI751 : Vector quantization
- Graduate class GEI755 : Speech and audio processing
Other web links
Scientific communications
See detailed publications list
Other information
Collaborations / Industrial partners :
- National : VoiceAge Corporation (a spin-off of Université de Sherbrooke)
- International : Nokia, Ericsson, France Telecom, Siemens