Program: Paper Session 8

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  A women in white is wearing headphones and looking up. Text above her head says '2019 AES International Conference on Immersive and Interactive Audio. March 27-29, 2019. York, UK.


Paper Session 8 - Rendering of IIA 2: Cross-talk Cancellation

Chair: Yesenia Lacouture Parodi


P8-1: "A robustness study for low-channel-count cross-talk cancellation systems"

Marcos Simón, Charles Berkeley, Eric Hamdan and Filippo Maria Fazi

Cross-talk cancellation makes possible the reproduction of binaural audio through loudspeakers. This is typically achieved by employing a digital signal processing network that controls the acoustic pressure at the listener's ears. Although this can be achieved by using only two loudspeakers, there has been a recent tendency of using loudspeaker arrays, which increase the robustness to source errors and reduce room's response influence. This document introduces a numerical study on the trade-off between cross-talk cancellation performance and the number of channels of a loudspeaker array. Special attention is given to the conditioning of the array and to how this is affected by inaccuracies in the driver response for different numbers of loudspeakers: 2, 3, 4, 5, and 7.


P8-2: "Three-channel Crosstalk Cancellation Mode Efficiency for Sources in the Far-Field"

Eric Carlos Hamdan and Filippo Maria Fazi

The singular value decomposition is used to analyse the generalised modes of the radiation matrix for a symmetric three-channel crosstalk cancellation loudspeaker system assuming plane wave sources in free-field. The addition of a third centre source acts as a physical lossless regularisation that dramatically improves the efficiency of the in-phase mode. In addition, the singular value decomposition is used to analyse the source strength solution for a plane wave virtual source. The validity of the derived source strengths for real systems is shown by comparison of the analytical function to source strengths calculated using KEMAR head-related transfer functions. The analytical formula is shown to be accurate up to approximately 700 Hz in far-field and anechoic conditions.


AES - Audio Engineering Society