Re: [rmcat] Roman Danyliw's Discuss on draft-ietf-rmcat-eval-criteria-12: (with DISCUSS and COMMENT)
Joerg Ott <ott@in.tum.de> Thu, 19 March 2020 13:22 UTC
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To: Roman Danyliw <rdd@cert.org>, The IESG <iesg@ietf.org>
Cc: "rmcat-chairs@ietf.org" <rmcat-chairs@ietf.org>, "varun.singh@iki.fi" <varun.singh@iki.fi>, "draft-ietf-rmcat-eval-criteria@ietf.org" <draft-ietf-rmcat-eval-criteria@ietf.org>, Martin Stiemerling <mls.ietf@gmail.com>, "rmcat@ietf.org" <rmcat@ietf.org>, Colin Perkins <csp@csperkins.org>
References: <158324752207.7683.15663429456876412351@ietfa.amsl.com> <05afa3e4-786b-f8b0-670b-510cfd961482@in.tum.de> <359EC4B99E040048A7131E0F4E113AFC0216FA0696@marchand>
From: Joerg Ott <ott@in.tum.de>
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Date: Thu, 19 Mar 2020 14:21:56 +0100
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Subject: Re: [rmcat] Roman Danyliw's Discuss on draft-ietf-rmcat-eval-criteria-12: (with DISCUSS and COMMENT)
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Hi Roman, thanks much, since the ref is already included in -13 we should be happily done. Best, Jörg On 19.03.20 00:18, Roman Danyliw wrote: > Hi Joerg! > > Thanks for the update. -13 addresses my DISCUSS points. One non-blocking comment on a COMMENT inline ... > > Thanks, > Roman > > -----Original Message----- > From: iesg <iesg-bounces@ietf.org> On Behalf Of Joerg Ott > Sent: Monday, March 9, 2020 3:56 PM > To: Roman Danyliw <rdd@cert.org>; The IESG <iesg@ietf.org> > Cc: rmcat-chairs@ietf.org; varun.singh@iki.fi; draft-ietf-rmcat-eval-criteria@ietf.org; Martin Stiemerling <mls.ietf@gmail.com>; rmcat@ietf.org; Colin Perkins <csp@csperkins.org> > Subject: Re: Roman Danyliw's Discuss on draft-ietf-rmcat-eval-criteria-12: (with DISCUSS and COMMENT) > > Dear Roman, > > thanks much for your comments. I just posted an updated draft (-13) to address those. See below. > >> ---------------------------------------------------------------------- >> DISCUSS: >> ---------------------------------------------------------------------- >> >> Section 5.2. Per “Sample video test sequences are available at: >> [xiph-seq] and [HEVC-seq]. The following two video streams are the >> recommended minimum for >> testing: Foreman and FourPeople.”, these test sequences seems underspecified. >> >> ** Is the “recommended” here intended to be normative? There is no >> RFC2119 boiler plate in this document to guide the parsing of the text. > > Recommended is recommended as per English language and it not used as a verb but as an adjective, indicating a suggestion. > >> ** From the text, there wasn’t much precision in where to find these >> recommended videos (Foreman and FourPeople). At the url pointed to by >> [HEVC-seq], I found the filenames “FourPeople_1280x720_60.yuv” and >> “foreman15_4000.yuv”, is that them? > > This is fixed in the rev now, also the link that disappeared is removed. > >> ** Is it expected for >> http://www.netlab.tkk.fi/~varun/test_sequences/foreman15_4000.yuv to >> be 0 bytes? I tried on 03/03/2020 at ~0950 EST > > The broken link is gone now. Both videos can be found in a single place now. It is clearer specified where to find them. > >> ** Give that that one of the recommended urls doesn’t work even before >> this draft is published, I have great reservation with keeping a >> normative “recommended” to such external repositories. However, >> providing pointers to repositories of “sample video test sequences” makes sense to me and is helpful. > > Should be addressed by now. > >> ---------------------------------------------------------------------- >> COMMENT: >> ---------------------------------------------------------------------- >> >> ** Section 3.1. The purpose of this log isn’t clear. What is the >> relationship of it to the metrics described in the previous section? >> Where does it fit into the measurement workflow? Is this constructed >> on a per packet capture file basis? > > Added a clarifying sentence: > > These data should suffice to compute the media-encoding independent metrics described above. Use of a common log will allow simplified post-processing and analysis across different implementations. > >> ** References: >> -- Section 3. Consider adding a citation for tcpdump and wireshark > > done > >> -- Section 4.4. Consider adding a citation for the “Bilbert-Elliot” >> model > > We got this comment also from Mirja, to which I replied: > > I could include a reference here for Gilbert-Elliot such as: > http://www.ohohlfeld.com/paper/hasslinger_hohlfeld-mmb_2008.pdf > > [Roman] Since it would be informative, I don't think it would hurt to add this citation. > > However, this not mandatory text and the second part of the sentence is even less specific and does (deliberately) not give a specific example. We don't want to create any prejudice here beyond random losses. The Internet changes, after all. > > In order to avoid this being a showstopper here (we don't have enough hour tonight for another rev round, I am adding this in now. Please provide feedback if this is really needed. I could still remove it in two weeks when I-D submission reopens. > >> ** Editorial: >> -- Section 3. Recommend explicitly spelling out PCAP as packet capture. > > This is spelled out in brackets; since this also refers to a commonly used file format, I would keep it as is. > >> -- Section 4.5. s/is is/is/ > > Fixed. > > Thanks much, > Jörg > >
- [rmcat] Roman Danyliw's Discuss on draft-ietf-rmc… Roman Danyliw via Datatracker
- Re: [rmcat] Roman Danyliw's Discuss on draft-ietf… Joerg Ott
- Re: [rmcat] Roman Danyliw's Discuss on draft-ietf… Roman Danyliw
- Re: [rmcat] Roman Danyliw's Discuss on draft-ietf… Joerg Ott