What is good, better, and the best audio? For WinHEC Cortana Workshop, Shenzhen, 11 August 2015

Transcription

1 What is good, better, and the best audio? For WinHEC Cortana Workshop, Shenzhen, 11 August 2015

2 2.0 Laptop as a Speakerphone CONEXANT AudioSmart TM Software SSP Input Noise Reduction Output Enhancement SoftAware Speaker Control mhd-audio or I 2 S / I 2 C CONEXANT CODEC with Integrated AudioSmart Amp Enterprise Class Full Duplex Speakerphone Experience Optimized for MS Lync/Skype Flawless Cortana Accuracy Audio Output >2X Louder No Risk to Speakers Better Media Consumption experience Sound Pressure Level at 1m Original System AudioSmart System USB Speakerphone (benchmark) 65dB 81dB 76dB No other solution can deliver full duplex conference speakerphone experience while concurrently delivering this level of loudness from laptop or tablet form factor Company Confidential and Proprietary 2

3 AUDIOSMART TM INPUT TECHNOLOGY Conexant Confidential and Proprietary 3

4 Conexant Smart Source Pickup (SSP) SSP: Conexant proprietary noise suppression algorithm. The one easy solution. Based on a Blind Source Separation technique, modified for real-world robustness. NOT Beamforming ; SSP uses spatial representation of target speech and noise sources to reduce stationary and semi non-stationary interference (i.e., babble noise). Speech can be at any angle relative to the microphones. Noise can be at any angle relative to the microphones, even in the same direction as the speech. Full-Sphere User Noise Conexant Confidential and Proprietary 4

5 SSP Voice + Speech Algorithm Value Proposition Conexant s Smart Source Pickup Input Pre-Processing Solution with 5M Technology Enables: High resolution VoIP + class-leading Automatic Speech Recognition from up to 5 meters (16 feet) away! Clear voice quality calls and videoconferencing in real-world conditions (i.e., across a large, noisy room). Conexant Voice/Speech Input Pre-Processing Intelligible Voice Calls Increased VoIP Clarity Speech Recognition Engine Decreased Word Error Rate Speech + Interference Clear Speech Conexant Confidential and Proprietary 5

6 SSP Versatility Supports all device orientations and use-cases with only 2 MICs, NO holes drilled in glass, and ZERO user input! Clamshell Stand Tent Tablet Lay-Flat Company Confidential and Proprietary 6

7 AUDIOSMART TM OUTPUT TECHNOLOGY Conexant Confidential and Proprietary 7

8 Constantly delivers DSP-optimized signal to speakers at maximum safe power level, independent of software Actual output power of H-bridge is monitored at chip pins (closed loop!) and intelligently averaged 100% in hardware Closed-loop system actively monitors speaker power consumption Output RMS is compared to a programmable threshold matching exact speaker capabilities RMS measurements drive intelligent gain control Class-D Power Optimization Adjustments are time-windowed to avoid false triggers by spikes in audio content PGA DAC Class-D Speaker Amplifier decrement gain during excess RMS output RMS Conexant Confidential and Proprietary 8

9 AUDIOSMART TM IOT EXAMPLE Conexant Confidential and Proprietary 9

10 Amazon Echo Seven Microphones Amazon Voice Processing Amazon voice trigger engine 2.0 Speaker Performance Comparison Conexant Smart Speaker Two Microphones Conexant Far-Field Voice Processing Sensory voice trigger engine (embedded in Conexant SOC) Company Confidential and Proprietary 10

11 Conexant Noise Suppression Performance vs Amazon ~40% Hit Rate improvement in noisy conditions (Noise 5dB lower than speech) No Hit Rate degradation in clean conditions (Noise 10dB lower than speech) 30% Hit Rate improvement in extremely noise conditions (Noise same level as speech) With Conexant processing, user will be understood one in three attempts With Amazon processing, user will almost never be understood Company Confidential and Proprietary 11

12 AUDIOSMART TM ABOUT CONEXANT Conexant Confidential and Proprietary 12

13 History of Conexant Audio 20+ years of Audio Signal Processing Expertise 20+ years of Audio Hardware Expertise < Acoustic Echo Cancellation enables speakerphone in production Fax/Modems Company Confidential and Proprietary Low-power PC audio codec in production computers DSP codec with integrated Class D in production systems Expanded PC audio portfolio (ADI acquisition) USB codec in production headsets, speakers and speakerphones 13 DSP Codec for high quality Voice Input and Communication in Tier 1 TVs Windows APO Library complements HW portfolio AudioSmart TM Class-D Integrated with Codec

14 Summary Single supplier providing Silicon & Software optimized to work better together Silicon High Performance ADC, DAC, CODEC s, DSP & Smart AMP Software Input Processing, Playback Processing & Awareness Ecosystems Driving end user use cases with Industry leaders Partnerships partners telling OEM s Conexant s solutions work better Applications support Audio for PC/Tablets/Headset/Docks/Smart Home/IoT Company Confidential and Proprietary 14

15 Worldwide, World-Class Support Highest concentration of computer audio systems knowledge in the industry Expert Support AND Engineering staff in every major time zone Proven track record enabling on-time shipment of Tier-1 OEM products France India China Singapore Taiwan Korea Japan Headquarters Waltham Design Centers Sales Offices Headquarters Irvine Design & Sales Austin *Supported through a network of 20 Distributors and 13 Rep Firms Company Confidential and Proprietary 15