[rmcat] AD review for draft-ietf-rmcat-rtp-cc-feedback-08

[Zaheduzzaman Sarker <[e-mail]>]

Hi,

Thanks for working on this informational document. This was a nice short read with useful information.

I think this is ready for IETF last call. I, however, have some minor comments below -

## Comments -

	- Anna has some good comments in her Shepherd write up mail (https://mailarchive.ietf.org/arch/msg/rmcat/XRWgsOrPbeWLXp7cRqutWZcRU70/ <https://mailarchive.ietf.org/arch/msg/rmcat/XRWgsOrPbeWLXp7cRqutWZcRU70/> ), please address them.

	- Section 2: Says -

   			"Approaches like in-network filtering of acknowledgements
   can reduce the feedback frequency and overhead in some cases, but
   this so-called "stretch-ACK" behaviour is non-standard and not
   guaranteed"


   		would be great to have references supporting this claim and definition of “stretch-ACK” or reference to that.

	- Section 2: Says -

			"indeed, it is unlikely that a video codec can react instantly to a rate change anyway, and there is little point in providing feedback more often than the codec can adapt" 

		 This kind of builds up the hope/assumption that it might be affecting the feedback frequency if this fact is known. But rest of the document does not deal with this information at all. I would suggest to be clear on how this information is used to calculate the frequency. 


	- Section 3.2 : repeats the Trtcp equation. Can we tag the same equation in section 3.1 and cross reference from section 3.2?

	- Section 3.2 : regarding SDES packet size calculation, I think it is worth mentioning where that 1 octet comes from to calculate 28 octet. 


			"The RTCP SDES packet will comprise a header (4 octets), originating SSRC (4 octets), a CNAME chunk, a terminating chunk, and any padding. If the CNAME follows [RFC7022] and [RFC8834] it will be 18 octets in size, and will need 1 octet of padding, making the SDES packet 28 octets in size.”     

		this calculates , 4 (header)+4 (SSRC)+18(CNAME)+1(padding) = 27 octet ( + 1 octet of terminating chunk ? Or more padding?)


//Zahed