On Semi 公司的BelaSigna R261是完整的系統級芯片解決方案,能為便攜式電腦,平板電腦,手機和其它手提音頻設備提供雙麥克風的降低噪音,提高語音清晰度. BelaSigna R261和各種的CODEC,基帶芯片和麥克風兼容,不需要校準.主要用在便攜式電腦,平板電腦,手機和其它手提音頻設備.本文介紹了BelaSigna R261主要特性, 架構圖,典型應用電路和接地方案圖.
Advanced Noise Reduction Solution for Voice Capture Devices
BelaSignaR261 is a complete system−on−chip (SoC) solution that provides advanced dual−microphone noise reduction in voice capture applications such as laptops, mobile phones, webcams, tablet computers and other applications that will benefit from improved voice clarity.
Featuring a novel approach to removing mechanical, stationary and non−stationary noise, the chip preserves voice naturalness for greater speech intelligibility even when the talker is further away or not optimally aligned with microphones providing unmatched freedom of movement for end−users. Designed to be compatible with a wide range of codecs, baseband chips and microphones without the need for calibration, BelaSigna R261 is easy to integrate, improving manufacturers’ speed to market.
Additional features include the ability to customize multiple voice capture modes and tune the algorithm to the unique needs of a manufacturer’s device. The chip includes a highly optimized DSP−based application controller with industry−leading energy efficiency and is packaged in two highly compact 5.3 mm2 WLCSPs to fit into even the most sized−constrained architectures and allow the use of the cheapest printed circuit board design technologies.
BelaSigna R261主要特性:
Advanced Two−Microphone Noise Reduction Algorithm
Preserves Voice Naturalness
Supports Close−Talk and Far−Talk
Conference Mode enables 360 Degrees Voice Pick−up
Configurable Algorithm Performance
Ultra Low Power Consumption
Ultra Miniature Form Factor
Complete System−on−Chip (SoC)
Highly Flexible Clocking Architecture
Hardware Configuration Interfaces
Prototyping Tools
These Devices are Pb−Free, Halogen Free/BFR Free and are RoHS Compliant
BelaSigna R261典型應用:
Laptop Computers
Mobile Phones
Tablet PCs
Webcams
Any Portable Audio Application with Voice Pick−up
圖1.BelaSigna R261架構圖
圖2.BelaSigna R261典型應用電路圖(1)
圖3.BelaSigna R261典型應用電路圖(2)
圖3.BelaSigna R261接地電路圖
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