Abstract
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.
| Original language | English |
|---|---|
| Title of host publication | Audio Engineering Society Convention 132 |
| Publisher | AES Audio Engineering Society |
| Number of pages | 4 |
| Publication status | Published - Apr 2012 |
| Externally published | Yes |
| Publication type | B3 Article in conference proceedings |
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