[AG-TECH] query re: delay
sondheim at panix.com
Mon Oct 2 04:13:30 CDT 2006
The delay's been limited to 1 second but the silence suppression was off;
I'll try it in the on position, and thanks - Alan
On Mon, 2 Oct 2006, Colin Perkins wrote:
> On 2 Oct 2006, at 09:00, Andrew A Rowley wrote:
>> In RAT, you can go to "Options..." then select "Reception" from the top
>> menu. From here you can limit the playout delay to 1 second (if I am
>> reading it correctly).
>> Playout delay in RAT is adaptive - my understanding of this is that if
>> there are lots of packets arriving late, it will increase the delay until
>> there is enough that most packets arrive within the time of the playout
>> delay. I think that VIC does this too, but no so aggressively, hence the
>> difference between audio and video delays. I am guessing that you see lots
>> of breaking up of the video which would show that it is having to throw
>> away lots of late packets.
> Also, do you have silence suppression turned on in rat? If not, and if the
> sender and receiver audio sampling clocks run at slightly different rates,
> delay can build up and result in the type of problem you're seeing (rat
> compensates for mismatched sampling clocks by varying the length of silent
> periods, which it can't do if silence suppression is disabled).
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