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RE: Silence dection for remoteIO mic recorder
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RE: Silence dection for remoteIO mic recorder

  • Subject: RE: Silence dection for remoteIO mic recorder
  • From: Savvas Constantinides <email@hidden>
  • Date: Tue, 29 Sep 2009 13:03:40 +0000
  • Importance: Normal
You would need to measure the energy of you incoming signal and compare it to a threshold. Anything below that is just background noise.
If you want to go another step you could use an envelope filter to be able to adjust more precisely how the output reacts to the input.
Check your requirements.
Have a look online and read about noise gates.

S

Date: Tue, 29 Sep 2009 04:55:21 -0700
From: email@hidden
To: email@hidden
Subject: Re: Silence dection for remoteIO mic recorder

Hi,

I don't know if converting recorded voice in PCM to MP3 or other compression CODECs (which Apple supports). Whether any of these CODECs support "silence" detection for compressed audio packets? Do you have any ideas on this?

Thank you
Tu

From: tahome izwah <email@hidden>
To: CoreAudio Mailing List <email@hidden>
Sent: Tuesday, September 29, 2009 8:01:29 AM
Subject: Re: Silence dection for remoteIO mic recorder

You will have to measure background noise in order to detect packets
that don't contain voice because in practice you rarely get silence
when noone is talking...

HTH
--th

2009/9/28 learnfromforum <email@hidden>:
> Dear list,
>
> Could anyone can help to point out how one can detect silence from the mic
> recorder? Since I would like to send voice packets to the network and it is
> not a good idea to send silence packets.
>
> Thank you,
> Tu
>
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References: 
 >Silence dection for remoteIO mic recorder (From: learnfromforum <email@hidden>)
 >Re: Silence dection for remoteIO mic recorder (From: tahome izwah <email@hidden>)
 >Re: Silence dection for remoteIO mic recorder (From: learnfromforum <email@hidden>)

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