CX20865 Datasheet, PDF (1/2 Pages) Conexant Systems, Inc – Asynchronous SRC and Sync Buffers

CX20865 Far Field Voice Input Processor SoC
Turnkey Solution Enabling Far Field Voice Control and Telepresence Applications
Features
Description
‹ Multi-vendors Speech Recognition Hit
Rate Optimization
‹ Skype^TM 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
‹ Speech Detection and Buffer during
System Stand-by
‹ Voice Trigger and Wake on Voice,
optional
‹ On-chip 32-bit Digital Audio Processor
‹ 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
‹ Serial data interface (I²S/PCM)
‹ USB Full Speed, 2.0 UAC compliant,
Asynchronous Data Transfer
‹ Asynchronous SRC and Sync Buffers
‹ I²C and UART control interface
‹ Serial EEPROM interface
‹ Integrated DC/DC for Power
Management
‹ 9x9mm 169 BGA Package, ROHS
compliant
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.
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.
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.
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.
Simplified Block Diagram
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