CX20865 Far Field Voice Input Processor SoC
Turnkey Solution Enabling Far Field Voice Control and Telepresence Applications
Features
Description
Multi-vendors Speech Recognition Hit
The CX20865 is the industry leading Far Field Voice Input Processor SoC, designed
for Voice Interactive applications. The device includes high-performance
Microphone ADCs, powerful dual core 32-bit hardware DSP, and integrated Power
Management. Combined with our advanced Far Field Voice Processing Algorithms,
it is the ideal turnkey solution for adding Voice Control, Voice Search, Telepresence
functionalities to SmartTV, Set-Top-Box, and Game Console appliances.
Rate Optimization
TM
Skype TV certified Far Field Voice
®
Processing with Watch Live and Talk
Selective Source Pickup™ Noise
Rejection Technology
Stereo Acoustic Echo Canceller
supporting 2.1 or 2.2 CH System
The CX20865 supports a microphone array with up to four synchronized ADCs and
programmable preamplifiers. Each preamplifier is paired with a dedicated bias
supply to eliminate crosstalk. The entire input path guarantees 106 dB Dynamic
Range, which maximizes Speech to Noise ratio with low boost and prevents
microphone saturation.
Speech Detection and Buffer during
System Stand-by
Voice Trigger and Wake on Voice,
optional
On-chip 32-bit Digital Audio Processor
Conexant's proprietary Far Field Voice Processing Algorithms take advantage of the
high-performance processing core and ADCs to deliver superior voice interactive
experiences in the most challenging room environments. The full-featured Selective
Source Pickup (SSP) algorithm significantly improves the Voice Control accuracy in
noisy situations, such as retail showrooms, living and family rooms, and other
gathering places. The voice processing chain also supports Multithread Processing
Streams, independently optimized for Voice Communication and Automatic Speech
Recognition.
18-bit Microphone ADC with 106 dB
full path Dynamic Range
Raw Audio Sample Rates: 8 ~96 kHz
0.125 dB Analog Front End Gain
Resolution
Independent Microphone Bias for low
cross talk
2
Serial data interface (I S/PCM)
The CX20865 device has an integrated DCDC converter, supporting Dynamic
Voltage Scaling (DVS), and Frequency scaling mechanisms to reduce power
consumption. When the ADC and DSP are active in Voice-on-Wake mode, the
device consumes less than 110 mW, well below the 0.5 Watt EC 1275/2008
requirement for Standby Power.
USB Full Speed, 2.0 UAC compliant,
Asynchronous Data Transfer
Asynchronous SRC and Sync Buffers
2
I C and UART control interface
Serial EEPROM interface
Integrated DC/DC for Power
Management
Simplified Block Diagram
9x9mm 169 BGA Package, ROHS
compliant
Applications
Voice Interactive SmartTV/STB
Voice Controlled Appliance
Telepresence
Far Field Audio Capturing
Game Console
Automotive
Part Number CX20865
Description Far Field Voice Input
Processor SoC
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