Re: [rtcweb] Quick comments on draft-roach-rtcweb-glareless-add-00

[Adam Roach <[e-mail]>]

On 5/9/13 10:18, Paul Kyzivat wrote:
> On 5/8/13 5:18 PM, Adam Roach wrote:
>>
>> What I was trying to say above is that the only information you would
>> need to convey is literally one, two, or three <mediatype,ordinality>
>> pairs. You don't say what you're planning to do with them, just that you
>> need them.
>
> How is that possibly enough? What codecs and codec parameters/optons? 
> What bandwidth? What bundling options? The list goes on.

I apologize. I must have done a really poor job in the prose in my 
draft, since I clearly didn't communicate the fundamental mechanism that 
I had in mind at all.

Let me try with a ladder diagram to see whether that helps illuminate 
what I'm proposing.


Offerer                             Answerer
    |                                    |
    |<----------Solicitation-------------|
    |  (I need 1 new audio 1 new video)  |
    |                                    |
    |                                    |
    |-------------SDP Offer------------->|
    | (Contains two more m-line sections |
    | than the current session; one      |
    | audio, one video. Both recvonly.)  |
    |                                    |
    |                                    |
    |<------------SDP Answer-------------|
    | (Makes use of the two new m-line   |
    | sections by populating them with   |
    | codec parameters, options, ssrc    |
    | bandwidth, bundling, etc, etc.)    |


/a