A platform for a flexible, smart microphone system using available hardware components is presented. Three subsystems are employed, specifically: (a) a set of digital MEMs microphones, with a one-bit serial output; (b) a preprocessing/digital-to-digital converter; and (c) a CPU/DSP-based embedded system with I2S connectivity. Basic preprocessing functions, such as noise gating and filtering can be performed in the preprocessing stage, while application-specific algorithms such as word spotting, beam-forming, and reverberation suppression can be handled by the embedded system. Widely used high-level operating systems are supported including drivers for a number of peripheral devices. Finally, an employment scenario for a wireless home automation speech activated front-end sensor system using the platform is analyzed.
Authors:
Kokkinis, Elias; Drossos, Konstantinos; Tatlas, Nicolas-Alexander; Floros, Andreas; Tsilfidis, Alexandros; Agavanakis, Kyriakos
Affiliations:
University of Patras; Ionian University; BLUEdev Ltd.; Ionian University; University of Patras; BLUEdev Ltd.(See document for exact affiliation information.)
AES Convention:
132 (April 2012)
eBrief:49
Publication Date:
April 26, 2012
Click to purchase paper as a non-member or you can login as an AES member to see more options.
No AES members have commented on this paper yet.
To be notified of new comments on this paper you can
subscribe to this RSS feed.
Forum users should login to see additional options.
If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.