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Re: [payload] SDP O/A -- L, D, ToP and Flexible mode

Varun Singh <varun@callstats.io> Tue, 05 March 2019 20:23 UTC

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From: Varun Singh <varun@callstats.io>
Date: Tue, 05 Mar 2019 22:23:04 +0200
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To: Bernard Aboba <bernard.aboba@gmail.com>
Cc: Bernard Aboba <Bernard.Aboba=40microsoft.com@dmarc.ietf.org>, Robin Raymond <robin@opticaltone.com>, "payload@ietf.org" <payload@ietf.org>
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Subject: Re: [payload] SDP O/A -- L, D, ToP and Flexible mode
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Hi Bernard,

Thanks for following up.

I didn’t get much feedback apart from you on the proposal, so I’d
appreciate if others could weigh in on the suggestions.

Regards,
Varun.

On Tue, 5 Mar 2019 at 22.20, Bernard Aboba <bernard.aboba@gmail.com> wrote:

> Varun --
>
> Have your suggestions for clarifying the SDP O/A answer negotiation in the
> document made it into the updates to draft-ietf-payload-flexible-fec-scheme?
>
> I re-read the latest update, and the problems still seem like they remain.
>
>
>
> On Tue, Feb 12, 2019 at 3:09 PM Bernard Aboba <Bernard.Aboba=
> 40microsoft.com@dmarc.ietf.org> wrote:
>
>> On Feb 12, 2019, at 2:12 PM, Varun Singh <varun@callstats.io> wrote:
>> >
>> > Do ToP modes 0, 1, and 2 implicitly mean no RTX?
>>
>> [BA] I believe that is what is implicit now, though it doesn’t make much
>> sense to me.
>>
>> > If so, why do we have this following ambiguity  (L, D, ToP are all
>> missing) means it is both Flexfec FEC and flexfec RTX?
>>
>> [BA] Good question. For me, flexible versus fixed and rtx/no rtx are
>> orthogonal questions.
>>
>> > I think the implicit assumption is that all of  flex FEC spec is
>> implemented.
>> >
>> > Offer can send and receive  X and answerer can send and receive Y.
>> >
>> > I can’t see why we would endorse a partial implementation?
>>
>> [BA] I agree that all major features and bitmask sizes should be
>> mandatory to implement. Would also like to see requirements on supported L
>> and D values. With this clarified the declarative model would work much
>> better.
>>
> _______________________________________________
>> payload mailing list
>> payload@ietf.org
>> https://www.ietf.org/mailman/listinfo/payload
>>
> --
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