Date of case study: 01/2020
Industry of business: Academic organization
Established: 1954
LightningChart solution: XY and signal tools

Speech and Audio Research Group

University of Sherbrooke, located in Canada, in the Province of Quebec, is a French-speaking institution hosting more than 31 000 students of which 1600 are foreign students from 88 countries worldwide. There are 6612 employees at the University of Sherbrooke, including 3400 professors, lecturers and the clinical professors at the Faculty of Medicine and Health Sciences. The university has earned a reputation for its hard-hitting research, which has led to major discoveries and innovations in a variety of disciplines.
The Speech and Audio Research Group work primarily in the field of digital signal processing, especially in the field of voice and audio processing. Their work is constantly on the lookout for industry needs, both in terms of standards and proprietary applications. Their mission is to remain a world leader in the field of compression and enhancement of signals.

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
  • 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

Group’s patent portfolio of more than 800 patents and patent applications in wideband voice and audio compression technologies are so far licensed to more than fifty-five digital voice and audio communication companies. The group is recognized as a major technological contributor of nine new wideband voice and audio standard codecs developed through the main Standard Setting Organisations (SSOs) such as 3GPP, 3GPP2, ITU, ISO/MPEG, CableLabs and OMA.

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Picture 1: The University of Sherbrooke’s Speech and Audio Research Group

“We chose LightningChart after evaluating several alternatives. None of the alternatives came remotely close in terms of performance. LightningChart is simply the fastest component on the market to display and manage graphics in signal processing. The controls are very easy to use. We use LightningChart as a tool to develop, implement and enhance our audio codecs (coder and decoder) for smart phones.”

– Frederik Lavoie, Engineer, University of Sherbrooke

Different heights represent differences in eye gazing/focusing time at different points on a given surface

Picture 2. Example of LightningChart in use

Different heights represent differences in eye gazing/focusing time at different points on a given surface

Picture 3. Example of LightningChart in use

Different heights represent differences in eye gazing/focusing time at different points on a given surface

Picture 4. Example of LightningChart in use