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Multiple Description Audio Coding for Wireless Low-Frequency Sound Zones

Citation Author(s):
Jan Ostergaard, Christian Pedersen, Mo Zhou, Niels de Koeijer, Martin Moller
Submitted by:
Jan Ostergaard
Last updated:
13 February 2023 - 7:26am
Document Type:
Research Manuscript
Document Year:
2023
Event:
Presenters:
Jan Østergaard
Paper Code:
175
Categories:
 

We present a joint design of sound zone control filters and robust audio coding for wireless low frequency sound zones. The audio signal is filtered using sound zone control filters and encoded using a multiple-description coder. The control filters and the multiple-description coder are combined in a nested loop. The inner loop performs filtering for sound zone control and generates multiple descriptions using oversampling and closed-loop prediction. The outer loop performs noise shaping and guarantees a trade-off between robustness and quality of the descriptions. A closed-form expression for the optimal sound-zone control filters are provided, and a simulation study demonstrates that even at moderate packet loss rates, a significant gain is possible compared to not using multiple descriptions.

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