Revision 1.1 May 2016 Front End DSP Audio Technologies for In-Car Applications ROADMAP 2016
PAGE 2 EXISTING PRODUCTS 1. Hands-free communication enhancement: Voice Communication Package (VCP-7) generation 7 Functionality: echo cancellation, noise reduction, adaptive directional microphone, automatic gain control, dynamic range compression Technology updates in 2016: not planned 2. Car audio enhancement: Music Refiner (Mu-Refiner-1) generation 1 Functionality: stereo enhancement and normalization, spectral enhancement, bass enhancement Technology updates in 2016: not planned
PAGE 3 2016-2017 ROADMAP PRODUCTS 1. 2016/Q2: Voice Communication Package (VCP-G8) generation 8 Better sound quality Enhanced functionality Reduced delay Ease of porting and optimization for various platforms 2. 2016/Q4: Music Enhancement (Mu-Refiner-2) generation 2 Enhanced functionality Automatic, ambient noise dependent loudspeaker volume and equalization Loudspeaker amplitude and phase response correction Ease of porting and optimization for various platforms 3. 2016/Q4: In-Car Voice Communication (IVC) In-car voice communication software for voice communication between the driver and rear passengers 4. 2017/Q2: Voice Enhancement Package (VEP) Speech pre-processing dedicated for speech recognition improvement Stereo echo cancellation Single, dual and multi-microphone noise reduction
Bluetooth protocol stack and RF PAGE 4 VCP-G8 new product scheduled for 2016: Voice Communication Package (VCP-G8) Roadmap Voice Communication Package G8 AGC DRC EQ Suppressor Acoustic Echo Canceller Adaptive Dual Microphone Voice Suppressor EQ AGC DRC Easy Listen Loudspeaker correction Basic VCP VCP add-ons (optional) Acoustic echo to be updated to be replaced with new to be introduced VCP-G8 is a completely new product: Adaptive Dual Microphone: Acoustic Echo canceller: All blocks are either revised or completely rewritten Improved algorithm with enhanced Improved algorithm with enhanced New blocks are introduced frequency resolution (35Hz vs. 125Hz frequency resolution (35Hz vs. 125Hz Overall code size is reduced for G7) for G7) Overall processing delay is reduced Overall MIPS is reduced Suppressor : One channel wind noise reduction Loudspeaker correction: Loudspeakers amplitude and phase Rain noise reduction response correction
PAGE 5 VEP new product scheduled for 2017 Voice Enhancement Package (VEP) Voice Controlled System ASR engine TTS engine Suppressor Voice Enhancement Package Adaptive Microphone Array (up to 4) Acoustic Echo Canceller (optional) Voice Audio + Audio + voice prompts Acoustic echo of voice prompts or music The purpose of Voice Enhancement Package (VEP) is to facilitate application of speech recognition technologies in modern cars. Preliminary results based on VCP G7 show that Alango technologies can significantly improve the speech recognition rate in the automotive cabin. VEP will be based on Alango latest speech enhancement technologies modified to exploit additional information available. In particular, additional delay of about 100ms will be exploited for look-ahead processing thus improving the quality and SNR.
PAGE 6 Music Refiner Technology Package Mu-Refiner (G2) an unique set of audio enhancement technologies improving music experience in cars and other mobile environments Audio Mu-Refiner technology Stereo Normalizer Audio Spectral Compander Bass Corrector Dependent Volume & EQ Loudspeaker Correction Audio Audio Audio Audio Stereo Normalizer Expands, shrinks or normalizes stereo effect making it optimal for specific cars and individual user preferences Spectral Compander Reduces the spectral dynamic range making music brighter and more enjoyable in mobile conditions Bass Corrector Boosting up bass line while preventing the speaker and power amplifier overload dependent volume and frequency equalization Automatically adjusting volume and frequency equalizer according to ambient car cabin noise Loudspeaker response correction Correction of loudspeaker amplitude and phase response for reproducing natural sound
PAGE 7 Technologies for in-car voice communication system (IVC( In-Car Voice Communication (IVC) a set of technologies for enabling easy in-vehicle voice communication between front and rear seats without turning the head or raising driver s voice Acoustic feedback Creating in-vehicle intercom system is complicated by acoustic feedback problems caused by: Strong acoustic coupling between loudspeakers and microphones High noise levels while driving requiring high speaker volume Large distance from the driver to the microphone requires large microphone gain Car Intercom Package AFC NS AVQ AFS AFC Acoustic Feedback Cancellation NS Suppression AVQ Automatic Volume & equalization AFR Acoustic Feedback Suppression
PAGE 8 CONTACT INFORMATION Your feedback, suggestions and questions are WELCOME info-il@alango.com www.alango.com Alango Technologies Ltd. - alangoaut