An Embedded-Processor Driven Test Bench for Acoustic Feedback Cancellation in Real Environments

Faccenda F, Squartini S, Principi E, Gabrielli L, Piazza F. An Embedded-Processor Driven Test Bench for Acoustic Feedback Cancellation in Real Environments. In: AES Convention 134. Audio Engineering Society; 2013. Paper 8835. Available from: https://aes.org/publications/elibrary-page/?id=16736

@inproceedings{Faccenda2013_16736,
  author = {Faccenda, Francesco and Squartini, Stefano and Principi, Emanuele and Gabrielli, Leonardo and Piazza, Francesco},
  title = {{An Embedded-Processor Driven Test Bench for Acoustic Feedback Cancellation in Real Environments}},
  booktitle = {AES Convention 134},
  note = {Paper 8835},
  year = {2013},
  month = may,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=16736}
}

TY  - CPAPER
TI  - An Embedded-Processor Driven Test Bench for Acoustic Feedback Cancellation in Real Environments
AU  - Faccenda, Francesco
AU  - Squartini, Stefano
AU  - Principi, Emanuele
AU  - Gabrielli, Leonardo
AU  - Piazza, Francesco
T2  - AES Convention 134
M1  - Paper 8835
PY  - 2013
DA  - 2013/05/06
UR  - https://aes.org/publications/elibrary-page/?id=16736
PB  - Audio Engineering Society
LA  - en
AB  - In order to facilitate the communication among speakers, speech reinforcement systems equipped with microphones and loudspeakers are employed. Due to the acoustic couplings between them, the speech intelligibility may result ruined and, moreover, high channel gains could drive the system to instability. Acoustic Feedback Cancellation (AFC) methods need to be applied to keep the system stable. In this paper a new Test Bench for testing AFC algorithms in real environments is proposed. It is based on the TMS320C6748 processor, running the Suppressor-PEM algorithm, a recent technique based on the PEM-AFROW paradigm. The partitioned block frequency domain adaptive filter (PB-FDAF) paradigm has been adopted to keep the computational complexity low. A professional sound card and a PC, where an automatic gain controller has been implemented to prevent signal clipping, complete the framework. Several experimental tests confirmed the framework suitability to operate under diverse acoustic conditions.
ER  -