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Re: Stats interface - Some comments on specific stats

From: Harald Alvestrand <harald@alvestrand.no>
Date: Mon, 17 Sep 2012 16:10:55 -0700
Message-ID: <5057ADFF.4040504@alvestrand.no>
To: public-webrtc@w3.org
On 09/17/2012 02:35 PM, Hutton, Andrew wrote:
>>> 3) The number of Silence suppressions in the RTP stream in a
>> reporting period need to be included.
>> What's a silence suppression, and how do we count them?
> [AndyH] We need an indication how many periods of silence suppression there has been during the session. How this is counted I understand depends on the codec in use. For some codec's probably a simply count of the RTP packets received with the marker bit set would be ok.
I'm still a bit naive about this stuff, so could you explain it in 
excruitating detail for some example codec?
IE if you have an SSRC that is switched between g.711 and comfort noise, 
we could count the packets with each payload type, but that's not the 
same data as "periods of silence suppression" - for that, we would have 
to count the number of times a CN packet arrived after a G.711 packet.

I don't know how we would do this with OPUS.

Another question .... what's the use case - ie what decision do you want 
to make based on this data?
Received on Monday, 17 September 2012 23:11:29 UTC

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