Abstract
This paper describes the implementation of a digital hardware architecture for correcting the effect produced by group delay distortion on multiway loudspeakers. The correction is performed by a digital filter implemented in the form of an FFT convolution. The application imposes real-time execution on an embedded low-cost platform using a high-resolution audio format (stereo coded on 24 bits @ 96 kHz). The result is a pipelined streaming architecture composed of FFT-complex multiplication-iFFT performed on 32,768 samples using a floating-point representation. The filter computation is performed in 72 ms and the overall maximal audio latency is 169 ms running on a Cyclone V FPGA.
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Acknowledgement
The research presented in this paper is initiated and supported by Goldmund Company, especially by Véronique Adam and Olivier Schmitt.
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© 2016 Springer International Publishing Switzerland
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Spierer, A., Upegui, A. (2016). Real-Time Audio Group Delay Correction with FFT Convolution on FPGA. In: Bonato, V., Bouganis, C., Gorgon, M. (eds) Applied Reconfigurable Computing. ARC 2016. Lecture Notes in Computer Science(), vol 9625. Springer, Cham. https://doi.org/10.1007/978-3-319-30481-6_19
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DOI: https://doi.org/10.1007/978-3-319-30481-6_19
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Publisher Name: Springer, Cham
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Online ISBN: 978-3-319-30481-6
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