ON Semi’s BelaSigna R261 is a complete system-on-chip (SoC) solution that uses an advanced dual-microphone noise reduction algorithm approach to reduce mechanical, stationary and non-stationary noise for laptops, mobile phones, webcams, tablets Computers and other voice capture applications that require higher voice intelligibility provide advanced dual-microphone noise management, are compatible with a variety of codecs, baseband chips and microphones, require no calibration, are easy to integrate, and are ideal for a variety of noisy environments. The main features, block diagram, input and output stage block diagram of BelaSigna R261, as well as 30-ball and 26-ball WLCSP package application block diagrams are introduced.
BELASIGNA R261 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 main features:
Advanced Two−Microphone Noise Reduction Algorithm
Preserves Voice Naturalness
Supports Close−Talk, Far−Talk and Custom Mode
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
These Devices are Pb−Free, Halogen Free/BFR Free and are Rohs Compliant
Typical applications of BelaSigna R261:
Any Portable Audio Application with Voice Pick−up
Figure 1. BelaSigna R261 Block Diagram: Complete Audio Processing System
Figure 2. BelaSigna R261 Input Stage Block Diagram
Figure 3. BelaSigna R261 output stage block diagram
Figure 4. BelaSigna R261 30-Ball WLCSP Package Application Block Diagram
Figure 5. BelaSigna R261 26-Ball WLCSP Package Application Block Diagram
For details, see: