CX20921 Datasheet | Conexant

CX20921 Far Field Voice Input Processor So C Audio Smart Data Sheet General Description The CX20921 is a high-performance, far field voice input processor System-on-Chip (So C). The CX20921 is the first product in this category with an integrated voice trigger function that supports a low system power Wakeon-Voice (Wo V) function. The device includes 24-bit microphone Analog-to-Digital Converters (ADCs), a powerful dual core 32-bit hardware Digital Signal Processor (DSP), and integrated power management. bined with Conexant’s Audio Smart™ far field voice input processing software suite, including Smart Source Pickup (SSP) noise suppression and full-duplex Acoustic Echo Cancellation (AEC), the CX20921 is the ideal turnkey solution for adding voice control, voice search, and Voice over Internet Protocol (Vo IP)/speakerphone functionalities to Smart TV, Set-Top Box (STB), Smart appliances, and automotive hands-free control and munication systems. The CX20921 device supports a microphone array with up to two synchronized ADCs and programmable preamplifiers. Each pre-amplifier is paired with a dedicated bias supply to eliminate crosstalk. The entire input path guarantees 106d B dynamic range, which maximizes speech-to-noise ratio with low boost and prevents microphone saturation. Conexant's proprietary far field Audio Smart software takes advantage of the built-in hardware to deliver a superior voice interactive experience in the most challenging room environments. The voice processing chain also supports multi-thread processing streams, which are independently optimized for voice munication and automatic speech recognition. When ADC and DSP are active in the Wake-on-Voice (Wo V) mode, the device consumes less than 70m W, which is well below the 0.5W European mission (EC) 1275/2008 requirement for standby power. Applications - Voice-controlled Smart TV/STB - Smart Bluetooth/Wi Fi speaker - Voice interactive smart appliance - Internet of Things (IOT) devices -...