LONDON – STMicroelectronics NV has introduced a digital audio processor IC that is intended for use in multi-microphone applications.
Multiple microphones can be used to locate sound sources in space and to enhance noise cancellation methods. With silicon-membrane MEMS microphones it is possible to produce arrays of small microphones or strips containing many silicon microphone die to improve the sound quality of mobile phones, tablet computers, gaming devices and video security systems.
The Smart Voice audio processors enable features such as acoustic echo cancellation, noise suppression, beam-forming. Multi-microphone systems also address next-generation audio applications, such as 3-D sound processing, sound-source localization, virtual microphones, and audio zooming.
ST’s newest digital audio processor is based on an acoustic processing engine that offloads intensive computing tasks from the main application processor. It handles up to 6 digital microphone inputs with dynamic array re-configuration and dedicated channel processing. The device integrates a high-quality scalable acoustic processing core with a tunable 10-band equalizer, a peak limiter, and gain and volume controls.
The Smart Voice processors come bundled with AP Workbench, a programming tool.
The STA321MPL, the first Smart Voice processor, is sampling with mass production scheduled for 2Q12. The unit pricing is $4 per unit for amounts of about 1,000 pieces.
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