Documents
Research Manuscript
Multiple Description Audio Coding for Wireless Low-Frequency Sound Zones
- Citation Author(s):
- 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:
- Log in to post comments
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.