demo victor 2
DESCRIPTION
TRANSCRIPT
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Victor Management Ltd.
Acoustic Noise Suppression
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• We are a start-up technology company
• The Hong Kong Poly University is our technology cooperation partner
About us
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• Noise exists any where there is communication
• Therefore Noise suppression is a critical issue for communication system
Why noise suppression?
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Primary noise suppression simulation results (white noise)
Before After NS
High level noise
Low level noise
* Double click the mouse to listen the performance
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Primary noise suppression simulation results
Volvo
Jet cockpit
Before After NS
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Comparison with overseas noise suppression performance
In car noise environment
After processing: reduce noise(25%)
After processing : reduce noise(80%)
Oversea Victor Management Ltd
Normal reduce
High reduce
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Why our two-microphone noise suppression?
Comparing with single microphone noise suppression there are two breakthroughs (reduce noise 20—30 dB)
• Work well under lower signal to noise ratio (High noise)
• Has good performance even in babble (canteen) noise environment
• Lower MIPS need
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Comparing two-microphone with single microphone noise suppression
ARM platform simulation results (babble noise)
Before processing
3G single microphone
Two-microphone
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Comparing two-microphone with single microphone noise suppression
ARM platform simulation results (engine noise)
Before process
3G single microphone
Two-microphpone
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Noise Suppression Applications
• hearing enhancement (aid)• mobile phone• conference phone• blue-tooth communication• wireless communication• VoIP nphone• microphone-headset• car hands-free phone• robot voice interface, etc.
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Audio noise suppression module (DSP real-time) for low signal to noise ratio
(close to 0 dB)
• Noise reduce > 20/40 dB• Request input S/N ratio > 0 dB• Sample rate 8 ~ 16 k sample/s• Delay 18 ms
feature can be modified for special customers
Applications of the module for high level telecom device, police and firemen telecom including: Webcam, Conference phone, Headset, Hearing aid, Mobile phone, VoIP phone, Bluetooth communication, Wireless communication, skype headphone, Digital audio recorder, Hands-free device, Audio surveillance, Skype TV, Internet TV, etc.
Product's size: 36 mm x 44 mm x 16 mm.
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Audio noise suppression module (DSP real-time) for low signal to noise ratio
• Noise reduce > 20/40 dB
• Request input S/N ratio > 0 dB
• Sample rate 8 ~ 16 k sample/s
• Delay 18 ms
Description Direction Signal Pin No.
Digital ground DGND DGND 1
Reserved signal2 for later use TBD RSV2 2
Reserved signal3 for later use TBD RSV3 3
Analog ground AGND AGND 4
Micphone Input IN (analog) MIC_IN 5
Line out (Right) OUT(analog) R_OUT 6
Line out (Left) OUT(analog) L_OUT 7
Analog Ground AGND AGND 8
Line In (Right) IN (analog) R_IN 9
Line In (Left) IN (analog) L_IN 10
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Other available technologies
• Audio codec (AAC-LC, MP3, AC3)
• Speech codec• Voice recognition• Acoustic echo cancellation• Speech low bit rate codec• Microphone array, etc.