Hi 홍근 김,
Based on my understanding, it seems that you want to generate an output using G.729 Voice Activity Detection (VAD) code, that sequentially lists the duration of speech, followed by the duration of silence, and then repeats this pattern.
To achieve this, you have to check the value returned by vadG729 function. It returns ‘1’ for speech and ‘0’ for silence. Using this value, you can get the desired functionality. Here is a sample code to demonstrate the logic -
% Initialize VAD parameters
VAD_cst_param = vadInitCstParams;
clear vadG729
% Run for 10 seconds
numTSteps = 1000;
silenceT = 0;
speechT = 0;
while(numTSteps)
% Retrieve 10 ms of speech data from the audio recorder
speech = audioSource();
% Call the VAD algorithm
decision = vadG729(speech, VAD_cst_param);
% Plot speech frame and decision: 1 for speech, 0 for silence
if (decision == 1)
if (silenceT == 0)
speechT = speechT + 1;
else
disp(['Silence for ', num2str(silenceT)]);
silenceT = 0;
speechT = 1;
end
else
if (speechT == 0)
silenceT = silenceT + 1;
else
disp(['Speech for ', num2str(speechT)]);
speechT = 0;
silenceT = 1;
end
end
scope(decision, speech);
numTSteps = numTSteps - 1;
end
Please refer to the following example for additional information - https://www.mathworks.com/help/dsp/ug/g-729-voice-activity-detection.html#:~:text=%27Scroll%27)%3B-,Stream%20Processing%20Loop,-Get
I hope this helps.
Best Regards,
Sachin
