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Fully Digital Low-Power Implementation of an Audio Front-End for Portable Applications

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Part of the Lecture Notes in Electrical Engineering book series (LNEE,volume 573)

Abstract

This work presents a fully digital implementation of an audio front-end for portable applications developed in a low-power perspective. Such platform acquires audio samples through a four digital Pulse Digital Modulation (PDM) microphones array and implements two-channel (left and right) beamformers to perform speech enhancement. The system also features a low-power Voice Activity Detector (VAD) for the implementation of source localization or noise reduction algorithms. Finally, the processed data can be converted into a 16-bit resolution Pulse Code Modulation (PCM) format and then transmitted through a standard Integrated Interchip Sound (I2S) interface. The front-end has been implemented onboard a Microsemi IGLOO nano Field Programmable Gate Array (FPGA), reaching a power consumption of only 2.264 mW. The low-power architecture and the implemented functionalities make the system a promising front-end for audio speech portable applications.

Keywords

  • Low-power digital architecture
  • Low-power FPGA
  • Digital signal processing
  • Audio beamforming
  • Voice activity detection

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References

  1. Altinok, G.D., Al-Janabi, M., Kale, I.: Improved ultrasound digital beamforming using single-bit sigma-delta modulators with band-pass decimation filters. In: 2011 IEEE International Symposium of Circuits and Systems (ISCAS) (2011)

    Google Scholar 

  2. Martín-Doñas, J.M., Gomez, A.M., López-Espejo, I., Peinado, A.M.: Dual-channel dnn-based speech enhancement for smartphones. In: 2017 IEEE 19th International Workshop on Multimedia Signal Processing (MMSP), pp. 1–6. IEEE (2017)

    Google Scholar 

  3. Meoni, G., Pilato, L., Fanucci, L.: A low power voice activity detector for portable applications. In: 2018 14th Conference on Ph.D. Research in Microelectronics and Electronics (PRIME), pp. 41–44. IEEE (2018)

    Google Scholar 

  4. Palla, A., Fanucci, L.: High performance embedded short time fourier transform architecture for real-time speech enhancement using differential microphone arrays. In: Embedded World Conference. WEKA FACHMEDIEN GmbH (2017)

    Google Scholar 

  5. Palla, A., Meoni, G., Fanucci, L.: Area and power consumption trade-off for \(\Sigma \)-\(\Delta \) decimation filter in mixed signal wearable IC. In: Nordic Circuits and Systems Conference (NORCAS), pp. 1–5. IEEE (2016)

    Google Scholar 

  6. Sanchez-Hevia, H.A., Gil-Pita, R., Rosa-Zurera, M.: FPGA-based real-time acoustic camera using pdm mems microphones with a custom demodulation filter. In: Sensor Array and Multichannel Signal Processing Workshop (SAM), 2014 IEEE 8th, pp. 181–184. IEEE (2014)

    Google Scholar 

  7. Schreier, R., Temes, G.C.: Understanding delta-sigma data converters (2005)

    Google Scholar 

  8. Taghizadeh, M.J., Garner, P.N., Bourlard, H., Abutalebi, H.R., Asaei, A.: An integrated framework for multi-channel multi-source localization and voice activity detection. In: 2011 Joint Workshop on Hands-free Speech Communication and Microphone Arrays (HSCMA), pp. 92–97. IEEE (2011)

    Google Scholar 

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Correspondence to Gabriele Meoni .

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Meoni, G., Pilato, L., Ciarpi, G., Palla, A., Fanucci, L. (2019). Fully Digital Low-Power Implementation of an Audio Front-End for Portable Applications. In: Saponara, S., De Gloria, A. (eds) Applications in Electronics Pervading Industry, Environment and Society. ApplePies 2018. Lecture Notes in Electrical Engineering, vol 573. Springer, Cham. https://doi.org/10.1007/978-3-030-11973-7_52

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  • DOI: https://doi.org/10.1007/978-3-030-11973-7_52

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  • Publisher Name: Springer, Cham

  • Print ISBN: 978-3-030-11972-0

  • Online ISBN: 978-3-030-11973-7

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