ACOUSTIC ECHO CANCELLER WITH DUAL CODECS ZL38003 PRODUCT PREVIEW Zarlink’s ZL38003 acoustic echo canceller is an integrated solution that bundles high-quality algorithms with codecs to meet design cost, complexity and integration issues for a wide range of hands-free communication systems. Applications include car kits, speaker phones and intercom systems. The ZL38003 chip deploys field-proven advanced adaptive algorithms designed to deliver exceptional performance in high background noise environments. The ZL38003 AEC’s integrated features, including codecs, programmable gain pads and a four-port cross-point switch eliminate the need for many external components. The chip supports full-duplex speech to provide clear signal transmission in both audio path directions, even when signal levels are low. `Full-duplex operation prevents subjective sound quality problems associated with noise gating or noise contrasting to ensure clear speech and uninterrupted background signals during conversation. Performance and Features for Hands-Free Communications Full-duplex operation and adaptive algorithm improve voice quality Optimized to reduce noise in handsfree communications Advanced NLP (non-linear processor) design provides fullduplex speech with no switched loss on audio paths Integrated Codec Two integrated DAC and ADC codecs with analog gain pads Mixed dual or single codec mode Integrated four-port cross-point switch allows analog signal to be directed to any of four ports ZL38003 Simplified Block Diagram ZL38003 Simplified Block Diagram Includes microphone and speaker amplifiers Acoustic Echo-Canceller with Noise Reduction Sin Analog Input* From Microphone Gain NLP Comfort Noise Injection ∑ Noise Reduction Sout PCM Output Gain Analog Output Control Unit Acoustic Echo Path Up to +6 dB Return Loss CODEC A Adaptive Filter Howling Prevention Double-Talk Detection Narrow-Band Network Signal Protection Gain Rout Analog Output To Speaker CODEC B Analog Input User Gain Rin PCM Input Serial Microprocessor Interface High Quality Performance Up to 12 dB of noise reduction Fast re-convergence time quickly tracks changing echo environment Control of adaptive filter convergence speed during periods of double-talk, far end single-talk and near-end echo path changes Provides protection against narrowband signal divergence Howling prevention stops uncontrolled oscillation in high loop gain conditions Automatic gain control on the receiver speaker path Technical Support Applications Hands-free car kits Intercom and pedestal systems Speakerphones and videoconference units Security systems The ZL38003 chip is supported by a customer evaluation board, reference designs, online simulation tools and more. Visit www.voiceprocessing.zarlink.com ZL38003 ACOUSTIC ECHO CANCELLER WITH DUAL CODECS APPLICATION Hands-Free Car Kits Desktop Phones Zarlink Solution Buyer Benefit Zarlink Solution Safety: Voice Recognition (VR) allows hands-free operation Noise reduction enables reliable VR, integrated codecs allow economical VR and playback implementation Sound Quality: Clear sound, no echo Noise reduction, full-duplex operation, AEC/ LEC algorithms Convenience: In-car audio system Bluetooth, FM transmitter and audio interfaces Hands-free Operation: Clear sound Noise reduction eliminates background noise Sound Quality: Clear speech, reduced noise Noise reduction and full-duplex operation enhance sound quality Functionality: Cancel echo in multi-size rooms No tuning required for room conditions, programmable echo tail and patented NLP ensure echo cancellation Interfaces: Bluetooth, VR, FM transmission Bluetooth reference design, interfaces allow use of off-the-shelf chips Configuration: Integrated approach No ROM code required to initialize chip Configuration: Easy to install Bluetooth, FM transmission for seamless installation of car kits Ergonomics Algorithms tunable to different plastic enclosures Buyer Benefit Desktop Phones )BOETGSFF$BS,JU4ZTUFN $FMM 1IPOF "OBMPH ;- "DPVTUJD&DIP$BODFMMFS XJUI*OUFHSBUFE$PEFDT "OBMPH '. 5SBOTNJUUFS "OBMPH $BS3BEJP Analog MH88437 Analog DAA .JDSPQIPOF DTMF Transceiver Voice Recognition .JDSP$POUSPMMFS Home Security System Zarlink Solution Security: Two-way communications, faster emergency service Audio interface to DAA simplifies establishing two-way communication Privacy: Voice communication activated only by owner Noise reduction improves VR Reduce False Dispatches: Eliminate phone verification Improved quality enables direct voice communication and voice enhancement Sound Quality AEC/LEC enhances sound quality Cost Reduction/Ease of Use One chip replaces multiple components %"" Analog Speakers Microphone SPI Keypad Micro Controller Order Pedestal Buyer Benefit .) Acoustic Echo Canceller with Integrated Codecs Analog MT8885 41* "OBMPH ZL38003 Buyer Benefit Zarlink Solution Sound Quality: Clear sound, no echo Noise reduction, full-duplex operation = improved customer service Cost Reduction and Design Ease One chip with integrated codecs and algorithms, supported by reference designs and modules with discrete components 0SEFS1FEFTUBM #MVFUPPUI .PEVMF "OBMPH )PNF4FDVSJUZ4ZTUFN ;- "DPVTUJD&DIP$BODFMMFS XJUI*OUFHSBUFE$PEFDT "OBMPH "OBMPH 8 "NQMJmFS "OBMPH ;- "DPVTUJD&DIP$BODFMMFS XJUI*OUFHSBUFE$PEFDT "OBMPH 8 "NQMJmFS "OBMPH 4QFBLFST .JDSPQIPOF 41* "OBMPH .JDSP$POUSPMMFS 4QFBLFST .JDSPQIPOF 41* ,FZQBE .JDSP$POUSPMMFS -$%%JTQMBZ Information relating to products and services furnished herein by Zarlink Semiconductor Inc. or its subsidiaries is believed to be reliable. The products, their specifications, services and other information appearing in this publication are subject to change by Zarlink without notice. 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