search for: vad_snr_factor_q16

Hi, When we pass around 9K samples of only ambient noise (no voice), the encoder which is enabled FEC+DTX is detecting only some 140 frames as non-voice (returning only TOC, no frame content). We were expecting all or more to be identified as non-voice. Our idea was to check how the decoder re-generates the original ambient noise during the silence duration (when we feed NULL to decoder) when

...de where speech probability is calculated based on which SNR is > estimated. Below is the part of the code I am talking about. > > /*********************************/ > /* Speech Probability Estimation */ > /*********************************/ > SA_Q15 = silk_sigm_Q15( silk_SMULWB( VAD_SNR_FACTOR_Q16, pSNR_dB_Q7 ) - > VAD_NEGATIVE_OFFSET_Q5 ); // step1: Calculate speech probability : comment > by me > > /* Power scaling */ > if( speech_nrg <= 0 ) { // step2: update speech probability based on > speech energy : comment by me > SA_Q15 = silk_RSHIFT( SA_Q15, 1 ); > } els...

...We are looking at the code where speech probability is calculated based on which SNR is estimated. Below is the part of the code I am talking about. /*********************************/ /* Speech Probability Estimation */ /*********************************/ SA_Q15 = silk_sigm_Q15( silk_SMULWB( VAD_SNR_FACTOR_Q16, pSNR_dB_Q7 ) - VAD_NEGATIVE_OFFSET_Q5 ); // step1: Calculate speech probability : comment by me /* Power scaling */ if( speech_nrg <= 0 ) { // step2: update speech probability based on speech energy : comment by me SA_Q15 = silk_RSHIFT( SA_Q15, 1 ); } else if( speech_nrg < 32768 ) { if...

Greetings, It is possible to manually adjust the sensibility of the VAD module in the Opus encoder? Thanks, ML www.eid.pt EID, S.A. Capital Social 1.100.000 N de matricula unico 501 400 699 DISCLAIMER art_001_01d0fc50.d7ccaf08" -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi, I changed the VAD sensitivity by varying VAD_SNR_FACTOR_Q16 and now it shows the difference in silence frames. Thanks Suresh On 4 October 2016 at 17:57, Suresh Thiriveedi <sthiriveedi at gmail.com> wrote: > Hi, > > When we pass around 9K samples of only ambient noise (no voice), the > encoder which is enabled FEC+DTX is detecting only s...

...We are looking at the code where speech probability is calculated based on which SNR is estimated. Below is the part of the code I am talking about. /*********************************/ /* Speech Probability Estimation */ /*********************************/ SA_Q15 = silk_sigm_Q15( silk_SMULWB( VAD_SNR_FACTOR_Q16, pSNR_dB_Q7 ) - VAD_NEGATIVE_OFFSET_Q5 ); // step1: Calculate speech probability : comment by me /* Power scaling */ if( speech_nrg <= 0 ) { // step2: update speech probability based on speech energy : comment by me SA_Q15 = silk_RSHIFT( SA_Q15, 1 ); } else if( speech_nrg < 32768 ) { if...

...is estimated. Below is the > part of the code I am talking about. > > /*********************************/ > /* Speech Probability Estimation */ > /*********************************/ > SA_Q15 = silk_sigm_Q15( silk_SMULWB( VAD_SNR_FACTOR_Q16, > pSNR_dB_Q7 ) - VAD_NEGATIVE_OFFSET_Q5 ); // step1: Calculate > speech probability : comment by me > > /* Power scaling */ > if( speech_nrg <= 0 ) { // step2: update speech probability > based on speech energy : com...

...ity is calculated based on which SNR is >> estimated. Below is the part of the code I am talking about. >> >> /*********************************/ >> /* Speech Probability Estimation */ >> /*********************************/ >> SA_Q15 = silk_sigm_Q15( silk_SMULWB( VAD_SNR_FACTOR_Q16, pSNR_dB_Q7 ) - >> VAD_NEGATIVE_OFFSET_Q5 ); // step1: Calculate speech probability : comment >> by me >> >> /* Power scaling */ >> if( speech_nrg <= 0 ) { // step2: update speech probability based on >> speech energy : comment by me >> SA_Q15 = silk_RSH...

...on which SNR is >>> estimated. Below is the part of the code I am talking about. >>> >>> /*********************************/ >>> /* Speech Probability Estimation */ >>> /*********************************/ >>> SA_Q15 = silk_sigm_Q15( silk_SMULWB( VAD_SNR_FACTOR_Q16, pSNR_dB_Q7 ) - >>> VAD_NEGATIVE_OFFSET_Q5 ); // step1: Calculate speech probability : comment >>> by me >>> >>> /* Power scaling */ >>> if( speech_nrg <= 0 ) { // step2: update speech probability based on >>> speech energy : comment by me &g...