• Geomtric Sound Source Localization @ EUSIPCO, WASP… October 27th, 2013 Xavier Alameda-Pineda and Radu Horaud Keywords: multivariate optimization, hyperbolic constraints, log-barrier interior point, branch & bound. We address the problem of sound-source localization from time-delay estimates using arbitrarily-shaped non-coplanar microphone arrays. A novel geometric formulation is proposed, together with a thorough algebraic analysis and a global optimization solver. The proposed model is thoroughly described and evaluated. ...
  • AV Robot Command recognition @ ICMI & ICASSP May 17th, 2013 Xavier Alameda-Pineda, Jordi Sanchez and Radu Horaud Keywords: audio-visual fusion, discriminative multimodal methods, robot command recognition. We investigated the problem of choosing a classifier for audio-visual command recognition. Because such commands are culture- and user-dependant, methods need to learn new commands from a few examples. We benchmark three state-of-the-art discriminative classifiers based on bag of words ...
  • Audio-visual speaker detection and localization April 27th, 2013 Joint work with a lot of people Keywords: EM algorithm, Model selection, Weighted-data, Audio-visual fusion. Natural human–robot interaction (HRI) in complex and unpredictable environments is important with many potential applications. While vision-based HRI has been thoroughly investigated, robot hearing and audio-based HRI are emerging research topics in robotics. In typical real-world scenarios, humans are ...
  • MQ Entropy Coder (in Matlab) January 28th, 2013 Matlab implementation of the MQ-coder, the entropy coder used in the image compression standard JPEG2000.
  • The Ravel Dataset December 20th, 2012 Xavier Alameda-Pineda, Jordi Sanchez-Riera, Johannes Wienke, Vojtech Franc, Jan Cech, Kaustubh Kulkarni, Antoine Deleforge, and Radu Horaud Keywords: audio-visual data set, human-robot interaction, natural indoor scene. We introduce Ravel (Robots with Audio-visual Abilities), a publicly available data set which covers examples of Human Robot Interaction (HRI) scenarios. These scenarios are recorded using the audio-visual robot head POPEYE, ...