Microsemi 无线会议电话的方案

1、Power Matters Wireless AEC Microphone proposal February 5, 2013 Power Matters. Distributed AEC Function 2 February 5, 2013 - Confidential ProcessorZL70250AECProcessorZL70250 AECProcessorZL70250 PCM Base Radio Remote AEC Microphone Remote AEC Microphone Remote AEC Microphone Note : Base radio can onl

2、y communicate with one remote AEC mic at a time. There is a control path to turn on/off link dynamically AECProcessorZL70250 Power Matters. Remote Microphone (Block Diagram) 3 February 5, 2013 - Confidential Compressed Voice AEC NX4108-12 NX4108-33 1.2V 3.3V MSP430ZL70250 Power control 2xAAA battery

3、 Stand by= Months Talk time = 25hrs Power Matters ZL70250 Ultra Low Power Sub-GHz Short-Range Radio 2012 Microsemi Corporation. Company Proprietary Power Matters. The ZL70250 Ultra Low Power Radio Transceiver Microsemis ISM RF IC Fully Integrated Sub-GHz ISM band tranceiver Short-range applications

4、up to 50m 2mA TX/RX peak current 1.1V to 1.9V supply Chip Scale Package (CSP) option available soon 2012 Microsemi Corporation. Company Proprietary Power Matters. ZL70250 Sub-GHz Radio Transceiver Technology:0.18 m mm RF CMOS Radio Frequency:795MHz 965MHz US: 902-928 MHz ISM band EU: 862-870 MHz SRD

5、 bands Type of RF link:Bi-directional, half duplex Bit Rate:186 kbits/s Current Consumption:2 mA from 1.2 - 1.8 V Battery Output power:up to 0dBm Typical: -10dBm Receiver sensitivity:-90dBm at full bit rate Externals:2 (Xtal,Res)excl. matching network if required Interfaces:SPI + 2-wire 6 2012 Micro

6、semi Corporation. CONFIDENTIAL Power Matters. Generic Application Diagram for the ZL70250 ULP Radio Transceiver 2012 Microsemi Corporation. Company Proprietary Power Matters. Z-Star Protocol Stack (running on external CPU) A proprietary protocol with great capabilities for continuous monitoring Othe

7、r standard protocols must interoperate on a WW basis and cannot be modified to adopt a low power mode Supports real-time streaming for continuous monitoring Low packet overhead assists with real time data transfer Operation in star configuration today Customers modify our stack to suit their applica

8、tion Software License Agreement (SLA) required for release of Z-Star source code 2012 Microsemi Corporation. CONFIDENTIAL Power Matters. Ultra Low Power Wireless- Applications Ultra-low-power wireless audio Smart card Data loggers Ambient monitoring In-vehicle sensors Building automation and home se

9、curity Package transport tracking sensors (Eg, Pharmaceutical) Asset monitoring sensors Modern Soldier Naval and commercial avionics Sensors based on Thin Film Battery (TFB) 2012 Microsemi Corporation. Company Proprietary Power Matters. Typical Application as a Wireless Analog Robust ultra low power

10、 radio is a key enabling technology Powered by a small and cheap battery (coin cell) or energy harvesting Ultra Low Power is required by the RFIC, MCU and analog front end chosen A low power communication protocol is often required ZL70250 2012 Microsemi Corporation. Company Proprietary MatchXtal An

11、tenna Analog Front-End Battery Power Matters. ZL70250 Product Line Product Availability Today 2mm x 3mm Chip Scale Package (CSP) ZStar Protocol stack ZLE70250 Application Development Kit ZStar reference design with digital accelerometer, ECG and Pulse Oximeter Ultra low power Mesh network protocol K

12、its available in Q1 2013 2012 Microsemi Corporation. Company Proprietary Power Matters. ZL3801x OVERVIEW Hardware Features Core: voice optimized 100 (effective MIPS) DSP Memory: 8KW instruction and 8KW data Interfaces: SPI, UART, I2S, 5 GPIOs ADC: dual channel, 8/16KHz sampling Firmware Features 256

13、/128ms AEC Non Linear ECAN Psychoacoustics Noise Reduction 16 band Equalizers Full duplex operation Convergence during double talk Future in-field upgrades possible Package 56 pin QFN, 8 mm x 8 mm, lead free Microsemi Voice Processor 12 Integrated Memory Hardware Accelerators Clock Generator Master/

14、Slave SPI UART Mute/LEDs I2S ADC ZL380 xx Simplified Block Diagram Power Matters. Key Features 2012 Microsemi Corporation. CONFIDENTIAL 13 IP Value IP BlockValue Acoustic Echo CancellationMeets TIA 810/920/VDA Line Echo CancellationRequired to remove line echo or side tone (Meets G.168) Narrowband(2

15、56ms)/ Wideband (128ms) Operation Meets G.711 and G.722 audio requirements Non-Linear Echo Canceller (NLAEC)Reduces residual echo caused by non-linearities Correlation Based Double Talk detectorAllows for higher acoustic coupling Single Microphone Psychoacoustic Noise Reduction Reduces stationary an

16、d quasi stationary noise Speaker LinearizationEnhance lower cost speakers performance AGC/ALCMaintains a constant signal level (Meets G.169) Features to Improve Difficult Echo Environments Dynamic Range CompressionAttenuates signal peaks while maintaining the same average power Dynamic EQAllows two

17、different EQ setting for single and double talk periods Frequency Domain Double Talk Detection Uses the differences between speakers and mic to improve double talk detection Power Matters. Performance 2012 Microsemi Corporation. CONFIDENTIAL Main Test Results ParameterResultsAcceptance TCL During Single Talk 61.42 dB40dB TC