Subject: [Gen-art] Gen-ART Last Call review of draft-ietf-xrblock-rtcp-xr-jb-11

From: Meral Shirazipour <[email-masked]>
Date: Fri, 31 May 2013 20:13:35 +0000

I am the assigned Gen-ART reviewer for this draft. For background on Gen-ART, please see the FAQ at http://wiki.tools.ietf.org/area/gen/trac/wiki/GenArtfaq  .

Please resolve these comments along with any other Last Call comments you may receive.

Document: draft-ietf-xrblock-rtcp-xr-jb-11
Reviewer: Meral Shirazipour
Review Date: 2013-05-31
IETF LC End Date: 2013-05-31
IESG Telechat date: NA

Summary:
This draft is almost ready to be published as Standard RFC but I do have some comments.

Nits/editorial comments:
-[Page 3], Section 1.4, Suggestion for clarity:
Old:"These metrics are used to report how the jitter buffer at the receiving end of RTP stream behaves
as a result of jitter in the network and are applicable to a range of RTP applications."

New:"These metrics are used to report how the jitter buffer at the receiving end of RTP stream behaves
as a result of jitter in the network; and they are applicable to a range of RTP applications."

-[Page 5], Section 3, paragraph 5, Suggestion for consistency:
"The Jitter Buffer"---->"The jitter buffer"

-[Page 5], last sentence, Suggestion for clarity:
"Assume that both are normalized in ticks."----->
"Assume that both are normalized in ticks (there are 10 000 ticks in a millisecond).

-[Page 6], point (iii), Suggestion for clarity:
"If r = t" --suggestion--> "If r == t"

-[Page 6], point (iv), Possible inconsistance:
"Delay playout of packet by D + (r-t)"
Comment: D is not normalized in ticks. r and t are.

-[Page 7], Section 4.1, Suggestion for consistency:
"JB Metrics Block"---->"Jitter Block (JB) Metrics Block"

-[Page 8], 3 lines before last, "the time spend"--typo-->"the time spent"

-[Page 9], line 9, missing "." before "In simple":
"It is calculated based on the time spent in the jitter buffer for the earliest arriving packet In simple..."

-[Page 16], Section 10.2 Reference [QMB] does not point to latest version.

Best Regards,
Meral

---
Meral Shirazipour
Ericsson
Research
www.ericsson.com