hi guys,
could any one help me on silence detection i will be very thank ful
thx in adavance
You… check for the silence(!)… and then gasp do the stuff.
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Seriously, if you want usefull answers you should provide all the details you can get.
Ah well… I tell you this… there are two kinds of “silence”. Digital absolute - there is nothing - silence and sound from let’s say line-in or a mic and there is no real noise. The former is easy to ckeck and the latter needs to be some kind of fuzzy conditions. So instead of checking for a zero volume you check for let’s say a volume wich is lower than 5% (or any other treshold).
Whenever the one or the other type occurs you set a marker and if it lasts for a specific timespan you found a pause/silence.
hi,
infact i am making a system, in which i will detect is clients mic is connected.
for that i have to check silence for some seconds.
if for that time i didnt get any signal thus i will give message of “mic unplug”.
i am capturing data in bytes.
now wat u suggest?
Check that the amplitude of the input data does not exceed some threshold for N samples where N is based on the duration of silence your are trying to detect.
What is hard about this? Am I missing something?
i am receiving data in bytes and how i configure the amplitude bcz it shows differernt values for same scenario.
if i got the value of byte for silence it would be very ease.
Are you using 8-bit samples? (Typically these days you use 16-bit audio samples)
You need to know the format you have configured for the audio source.
E.g. signed vs. unsigned (w. offset), 8 or 16 bit.
Then it is easy. for signed data silence is near 0, for unsigned data silence is near the middle of the range. Because of noise you will need to consider a band around the true silence value to be silence.