Any suggestions on how to increase the voice recognition accuracy in noisy environment?

Hi there,



Here are all the parameters. Please check the detail functions at right side. thanks.



pi@raspberrypi:~/usb_4_mic_array $ python tuning.py -p

name type max min r/w info

-------------------------------

AECFREEZEONOFF int 1 0 rw Adaptive Echo Canceler updates inhibit.

0 = Adaptation enabled

1 = Freeze adaptation, filter only

AECNORM float 16 0.25 rw Limit on norm of AEC filter coefficients

AECPATHCHANGE int 1 0 ro AEC Path Change Detection.

0 = false (no path change detected)

1 = true (path change detected)

AECSILENCELEVEL float 1 1e-09 rw Threshold for signal detection in AEC [-inf … 0] dBov (Default: -80dBov = 10log10(1x10-8))

AECSILENCEMODE int 1 0 ro AEC far-end silence detection status.

0 = false (signal detected)

1 = true (silence detected)

AGCDESIREDLEVEL float 0.99 1e-08 rw Target power level of the output signal.

[−inf … 0] dBov (default: −23dBov = 10log10(0.005))

AGCGAIN float 1000 1 rw Current AGC gain factor.

[0 … 60] dB (default: 0.0dB = 20log10(1.0))

AGCMAXGAIN float 1000 1 rw Maximum AGC gain factor.

[0 … 60] dB (default 30dB = 20log10(31.6))

AGCONOFF int 1 0 rw Automatic Gain Control.

0 = OFF

1 = ON

AGCTIME float 1 0.1 rw Ramps-up / down time-constant in seconds.

CNIONOFF int 1 0 rw Comfort Noise Insertion.

0 = OFF

1 = ON

DOAANGLE int 359 0 ro DOA angle. Current value. Orientation depends on build configuration.

ECHOONOFF int 1 0 rw Echo suppression.

0 = OFF

1 = ON

FREEZEONOFF int 1 0 rw Adaptive beamformer updates.

0 = Adaptation enabled

1 = Freeze adaptation, filter only

FSBPATHCHANGE int 1 0 ro FSB Path Change Detection.

0 = false (no path change detected)

1 = true (path change detected)

FSBUPDATED int 1 0 ro FSB Update Decision.

0 = false (FSB was not updated)

1 = true (FSB was updated)

GAMMAVAD_SR float 1000 0 rw Set the threshold for voice activity detection.

[−inf … 60] dB (default: 3.5dB 20log10(1.5))

GAMMA_E float 3 0 rw Over-subtraction factor of echo (direct and early components). min … max attenuation

GAMMA_ENL float 5 0 rw Over-subtraction factor of non-linear echo. min … max attenuation

GAMMA_ETAIL float 3 0 rw Over-subtraction factor of echo (tail components). min … max attenuation

GAMMA_NN float 3 0 rw Over-subtraction factor of non- stationary noise. min … max attenuation

GAMMA_NN_SR float 3 0 rw Over-subtraction factor of non-stationary noise for ASR.

[0.0 … 3.0] (default: 1.1)

GAMMA_NS float 3 0 rw Over-subtraction factor of stationary noise. min … max attenuation

GAMMA_NS_SR float 3 0 rw Over-subtraction factor of stationary noise for ASR.

[0.0 … 3.0] (default: 1.0)

HPFONOFF int 3 0 rw High-pass Filter on microphone signals.

0 = OFF

1 = ON - 70 Hz cut-off

2 = ON - 125 Hz cut-off

3 = ON - 180 Hz cut-off

MIN_NN float 1 0 rw Gain-floor for non-stationary noise suppression.

[−inf … 0] dB (default: −10dB = 20log10(0.3))

MIN_NN_SR float 1 0 rw Gain-floor for non-stationary noise suppression for ASR.

[−inf … 0] dB (default: −10dB = 20log10(0.3))

MIN_NS float 1 0 rw Gain-floor for stationary noise suppression.

[−inf … 0] dB (default: −16dB = 20log10(0.15))

MIN_NS_SR float 1 0 rw Gain-floor for stationary noise suppression for ASR.

[−inf … 0] dB (default: −16dB = 20log10(0.15))

NLAEC_MODE int 2 0 rw Non-Linear AEC training mode.

0 = OFF

1 = ON - phase 1

2 = ON - phase 2

NLATTENONOFF int 1 0 rw Non-Linear echo attenuation.

0 = OFF

1 = ON

NONSTATNOISEONOFF int 1 0 rw Non-stationary noise suppression.

0 = OFF

1 = ON

NONSTATNOISEONOFF_SR int 1 0 rw Non-stationary noise suppression for ASR.

0 = OFF

1 = ON

RT60 float 0.9 0.25 ro Current RT60 estimate in seconds

RT60ONOFF int 1 0 rw RT60 Estimation for AES. 0 = OFF 1 = ON

SPEECHDETECTED int 1 0 ro Speech detection status.

0 = false (no speech detected)

1 = true (speech detected)

STATNOISEONOFF int 1 0 rw Stationary noise suppression.

0 = OFF

1 = ON

STATNOISEONOFF_SR int 1 0 rw Stationary noise suppression for ASR.

0 = OFF

1 = ON

TRANSIENTONOFF int 1 0 rw Transient echo suppression.

0 = OFF

1 = ON

VOICEACTIVITY int 1 0 ro VAD voice activity status.

0 = false (no voice activity)

1 = true (voice activity)



Seeed techsupport team

Bill