[Allstar Digital] DMRGateway

[John D. Hays]

The jitter buffer would also need to fill for dropouts (silence or a
repeated sequence of the previous few octets).

On Mon, Nov 28, 2016 at 9:21 AM, John D. Hays <john at hays.org> wrote:

> I speculate that the solution is going to be implementing jitter buffering
> on the PCM side of the audio going into the DV3000 (ThumbDV or PiDV) and
> possibly outbound.  The AMBE3000 chip is a fairly simple I/O device and the
> packet protocol is looking for a stream of PCM audio coming in for AMBE
> out, and a stream of AMBE in for PCM out.  If those streams are 'starved'
> (underflow) for data, it doesn't automatically fill in the missing data.
>
> On Mon, Nov 28, 2016 at 6:57 AM, Robert Newberry <N1XBM at amsat.org> wrote:
>
>> I have been playing around with the DV3000 and I noticed something
>> interesting in regards to the "runaway delay" users that are rapid fire
>> picket fencing seem to be the causing the problem. I was even able to
>> see/hear the problem happen.
>>
>> I have 3 users on my repeater network. one of them was having a problem
>> with the voter, another always has a extremely poor picket fence signal,
>> and the last is on a VOX circuit who drops and picks up PTT a lot.
>>
>> The last two weeks two of the three people fixed their problems and had
>> solid signals allowing for trouble free DMR <-> Allstar QSO for atleast a
>> half hour. The third person who is perpetual weak showed up and instantly
>> the dv3000 started building a delay.
>>
>> I did some targeted controlled testing and introduced what I'd call rapid
>> key/unkey and I could make the delay start to a point where it appeared I
>> somehow over loaded the DV3000 to start it dropping out. I then re ran the
>> test with solid analog signals for 40 minutes and the gateway ran
>> perfectly.
>>
>> I also am using on dv3000 between two repeaters and using the bridge to
>> route the talkgroup for allstar audio to two repeaters which causes slow
>> slurred audio on one repeater. I'm still trying to figure out how to stop
>> this. The problem goes away when I remove the bridge rules to send the
>> Allstar talkgroup to my other repeater.
>>
>> N1XBM
>> Apparare Scientor
>> Paratus Communicare
>> Allstar Node # 27086, 41540, 41812, 42086, 42658, 42657
>> www.radioguysrepeaternetwork.com
>>
>> _______________________________________________
>> Allstar-Digital mailing list
>> Allstar-Digital at lists.keekles.org
>> http://lists.keekles.org/cgi-bin/mailman/listinfo/allstar-digital
>>
>>
>
>
> --
>
> ------------------------------
> John D. Hays
> K7VE
>
> PO Box 1223, Edmonds, WA 98020-1223
>    <http://k7ve.org/blog>  <http://twitter.com/#!/john_hays>
>
>


-- 

------------------------------
John D. Hays
K7VE

PO Box 1223, Edmonds, WA 98020-1223
   <http://k7ve.org/blog>  <http://twitter.com/#!/john_hays>
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