Re: [MMUSIC] Progressing the rid draft (RTP Payload Format Constraints)

[Adam Roach <[e-mail]>]

On 2/5/16 15:01, Peter Thatcher wrote:
> Having just re-read draft-ietf-mmusic-rid-02 from to top to bottom, I 
> think it's in a very good state.  I only have minor readability and 
> editorial comments where I think it could be improvements.

Thanks!

>  On small matters of readability:
>
> - We use the term "RID RTP streams", which is then defined in another 
> spec as "source RTP Streams".  Can we just call them "source RTP 
> streams" here too and save the reader some indirection?

But it's not exactly "a Source RTP Stream". It's "a Source RTP Rtream, 
*or* the non-redundant RTP Stream of a Dependent Stream," which is a bit 
too unwieldy to use all over the document.

This distinction between "Source RTP Stream" and "RID RTP Stream" is 
small but important. If you want to suggest a different term for this 
construct, I'm quite keen to have a more intuitive term. But I spent 
probably way too much time scratching my head over this without coming 
up with anything better than "RID RTP Stream".

You can argue that RFC 7576 should have defined a term that we could 
just use here, and I would heartily agree. But it didn't, and we've got 
to work with the terms as published.


> - We use the terms "constraints", "parameters" and even "constraining 
> parameters", which I believe all mean the same thing.  Can we just 
> pick one and save the reader some disambiguation?

I'll make a pass to clean this up. I'm going to go with "constraint" so 
as to avoid confusion with ftmp parameters.
> On the open issues:
>
> 11.1 (declarative SDP): I agree with keeping the current text.
>
> 11.2 (bitrate definition): I agree with keeping the current text.
>
> 11.3 (escaping values): I agree with option #3 (let a future extension 
> define it, if needed).
>
> 11.4 (max-width and max-height): Either way is fine to me (included or 
> not).
>
> 11.5 (max-fps definition): I agree with keeping the current text.

Thanks for explicitly commenting on the open issues. :)

> And finally, some very minor editoral things:
>
> - The sentence "All "rid" parameters MUST be registered ... Section 
> 12" doesn't have a period at the end.
>
> - The sentence "The SDP given below skips few lines" should be "The 
> SDP given below skips a few lines".
>

Good catches. Thanks.

/a