January 26, 2017

January 27 - 29, 2017

The Winter School on Speech and Audio Processing presents live telecasts of lectures here.

Topics by International speakers

Ivan Tashev

  1. Spatial audio reproduction using personalized HRTFs

  2. Mathematical optimization in algorithm and design of audio processing devices

  3. Personal sound zones and multi-zone sound control

  4. Virtual reality and its applications

  5. Active room compensation

Emanuel Habets

  1. Parametric Spatial Audio Processing

  2. Reverberation and Dereverberation

  3. Speech Enhancement and Separation

  4. Recording and Reproducing Higher-Order Ambisonics

Christof Faller

  1. Spatial hearing -- introduction/overview

  2. Spatial audio acquisition and rendering (spatial microphones, beamforming etc.)

  3. Loudspeaker based spatial audio (upmixing/downmixing)

  4. Wavefield synthesis

Topics by National speakers

Rajesh Hegde

Lecture #1

  1. Introduction to Spatial Hearing : Co-ordinate Systems in Spatial Hearing, Listening Conditions, Sound Interaction in Spatial Hearing, Spatial Sound Reproduction, Cues for Sound Localization

  2. Techniques for Spatial Sound Reproduction : Sound Field Synthesis, 2D and 3D Loudspeaker setups, Stereophony, Amplitude Panning, Quadraphony, Dolby, Surround Sound (5.0, 5.1,7.1), 2D and 3D Vector based Amplitude Panning (VBAP), Loudspeaker Array Design for VBAP, DiRAC, Creating Personal Sound Zones, Evaluation Metrics for Spatial Audio Systems

Lecture #2

  1. Classification of Sound Field Synthesis Methods, Acoustic Curtain, Huygens Principle, Solution to the Homogeneous Wave Equation, Kirchhoff Helmholtz Integral, Rayleigh I Integral, Wave Field Synthesis (WFS) using KHF and R-I Integral, Monopole and Dipole Sources, 2.5D WFS, Time Domain Implementation of WFS, Discretization of Secondary Sources in WFS, Loudspeaker Geometry for WFS.

  2. Sound Field Synthesis using Ambisonics, B-Format, Lower Order Ambisonics, Encoding and Decoding of Ambisonic channels, Spherical Harmonic Description of the Sound Field, Higher Order Ambisonics, Ambisonic to Binaural, Virtual Reality and Dynamic VR Applications

Lalan Kumar

  1. Acquisition of directional, spatial audio using linear, circular and spherical microphone arrays : Coordinate systems (cartesian and spherical), array geometry, Point sources, Acoustic Wave equation and solution, Near and far field source acquisition and localization

  2. Brief Introduction to localization and beamforming of audio sources in 3D space using microphone arrays : MUSIC, root-MUSIC, SRP-PHAT, Delay sum, Filter sum, Capon, LCMV methods; Near field beamforming over spherical microphone arrays

  3. Parametric spatial sound processing : Geometric models (DOA based models using single microphone array and position based models using multiple microphone arrays), single and multichannel filters for spatial analysis

Prasanta Kumar Ghosh

  1. Introduction to Binaural source localization, Binaural co-ordinate system, Horizontal and Media plane cues for binaural source localization, ITD, ILD, Spectral Cues, DIstance Cues, Precedence,  Directional Hearing in enclosed spaces, Room effects, Distance Perception.

  2. Introduction to Head Related Impulse response (HRIR) and Head related Transfer Functions (HRTF), HRTF Magnitude and phase characteristics, Structural composition and decomposition of HRTF, Spectral cues provided by HRTF, Localization using HRTF Cues, Non Individual and Personalized HRTF; Generalized HRTF, Equalization, and Interpolation of HRTFs, Analytical modeling of HRTFs, Distance and Reverberation models, Auralization.

© 2017, by IISc, Bengaluru.

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