Victor Management Ltd.

Acoustic Noise Suppression

• We are a start-up technology company

• The Hong Kong Poly University is our technology cooperation partner

About us

• Noise exists any where there is communication

• Therefore Noise suppression is a critical issue for communication system

Why noise suppression?

Primary noise suppression simulation results (white noise)

Before After NS

High level noise

Low level noise

* Double click the mouse to listen the performance

Primary noise suppression simulation results

Volvo

Jet cockpit

Before After NS

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

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

Comparing two-microphone with single microphone noise suppression

ARM platform simulation results (babble noise)

Before processing

3G single microphone

Two-microphone

Comparing two-microphone with single microphone noise suppression

ARM platform simulation results (engine noise)

Before process

3G single microphone

Two-microphpone

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.

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.

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

Other available technologies

• Audio codec (AAC-LC, MP3, AC3)

• Speech codec• Voice recognition• Acoustic echo cancellation• Speech low bit rate codec• Microphone array, etc.

Thank You!

Tel.: (852) 34062935 or 68064216

email : l_p_zhang@yahoo.com