Re: [pm-dir] request for an RFC 6390 review of https://www.ietf.org/id/draft-ietf-xrblock-rtcp-xr-video-lc-01.txt
"Huangyihong (Rachel)" <rachel.huang@huawei.com> Wed, 09 September 2015 06:38 UTC
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From: "Huangyihong (Rachel)" <rachel.huang@huawei.com>
To: Qin Wu <bill.wu@huawei.com>, "pm-dir@ietf.org" <pm-dir@ietf.org>, "Romascanu, Dan (Dan)" <dromasca@avaya.com>, "MORTON, ALFRED C (AL)" <acmorton@att.com>
Thread-Topic: [pm-dir] request for an RFC 6390 review of https://www.ietf.org/id/draft-ietf-xrblock-rtcp-xr-video-lc-01.txt
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Date: Wed, 09 Sep 2015 06:37:41 +0000
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Subject: Re: [pm-dir] request for an RFC 6390 review of https://www.ietf.org/id/draft-ietf-xrblock-rtcp-xr-video-lc-01.txt
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Hi Qin, Thank you for the additional comments. Please see inline. BR, Rachel > -----Original Message----- > From: Qin Wu > Sent: Wednesday, September 09, 2015 9:24 AM > To: pm-dir@ietf.org; Romascanu, Dan (Dan); MORTON, ALFRED C (AL) > Cc: Huangyihong (Rachel) > Subject: RE: [pm-dir] request for an RFC 6390 review of > https://www.ietf.org/id/draft-ietf-xrblock-rtcp-xr-video-lc-01.txt > > FYI. > -----邮件原件----- > 发件人: Qin Wu > 发送时间: 2015年8月17日 10:22 > 收件人: 'Vinayak Hegde'; MORTON, ALFRED C (AL) > 抄送: shida@ntt-at.com; Romascanu, Dan (Dan); pm-dir@ietf.org; Benoit > Claise (bclaise@cisco.com); alissa@cooperw.in > 主题: RE: [pm-dir] request for an RFC 6390 review of > https://www.ietf.org/id/draft-ietf-xrblock-rtcp-xr-video-lc-01.txt > > Your comments look good, Agree with your opinion. > here are a few additional comments: > 1. Abstract > What are “those” in the abstract? RTCP XR Reporting Block or Block types? > What does "augment" stands for? > Suggest to make the following change > NEW TEXT: > “ > This document defines a new RTCP XR Report Block that allows the reporting of > concealment metrics for video applications of RTP. This XR report block > complete ones defined in RFC[7294]. [Rachel]: looks good. > ” > 2.Section 4, 1st paragraph, last sentence What is “consistent point”? remove > it? [Rachel]: Okay. I'll remove this sentence. > > 3.Section 4, definition of " Mean Concealed Frame Proportion (MCFP) " > loss concealment (using V)? Suggest to make the following change: > Loss concealment method (depicted as “V” in the definition of “Video Loss > Concealment Method Type”) [Rachel]: Agree. 4. Section 7.3 To get in line with other XR Block > related RFC, suggest the following change: > NEW TEXT: > “ > The contact information for the registrations is: > > RAI Area Directors > > rai-ads@tools.ietf.org [Rachel]: Okay. > ” > 5. Appendix A: > s/incorporated into/applied to > What does “V” stand for? Please specify it clearly without dependency on the > figure in this document, suggest the following change: > s/V/ Video Loss Concealment Method Type [Rachel]: Will do. > 6.Appendix A,bullet e: > " > The concealed > proportion of each video frame is obtained by dividing the number > of concealed macroblocks from this video frame by the total > macroblock number of the video frame, which is equivalent to > taking the integer part after multiplying the fraction by 256. > " > Suggest the following change: > OLD TEXT: > " > which is equivalent to > taking the integer part after multiplying the fraction by 256 " > NEW TEXT: > " > multiplying the result of the division by 256, limiting the maximum value to 255 > (to avoid overflow), and taking the integer part. > " [Rachel]: Good suggestion. And it may also address the confusion of Vinayak. > > -Qin > -----邮件原件----- > 发件人: pm-dir [mailto:pm-dir-bounces@ietf.org] 代表 Vinayak Hegde > 发送时间: 2015年8月17日 2:45 > 收件人: MORTON, ALFRED C (AL) > 抄送: shida@ntt-at.com; Romascanu, Dan (Dan); pm-dir@ietf.org; Benoit > Claise (bclaise@cisco.com); alissa@cooperw.in > 主题: Re: [pm-dir] request for an RFC 6390 review of > https://www.ietf.org/id/draft-ietf-xrblock-rtcp-xr-video-lc-01.txt > > Hi Qin Wu, You can also review it. More eyes make better standards :) > > Review Follows. > > 1. In section 3, where you describe loss concealment methods, I get the > impression after reading the draft that all frames are created equal after > reading the draft. Generally in video encoding there are key frames[1] which > are more important as they carry full information and are not dependent on > other frames so methods 3b and 3c would require a lot of computation to > reconstruct atleast parts of the frame. This aspect is not emphasized in the > draft. > > 2. Also in Section 3d (Error Resilient Encoding), there are two clear subparts > a. You can have vector related extra metadata that can be used to > reconstruct the scene based on loss of primary data > b. You can have bit-block level encoding like Reed-Solomon error > correction[2] Both of these are different techniques so should be split under > their own subheadings. > > 3. Also it would be great to have some explanation of why frame freeze was > chosen for special treatment (in bit reservation) > > 4. In section 4.1 The definition of MIFP is confusing especially the part where it > says "after multiplying the fraction by 256" > > 5. In section 4.1 The definition of MCFP, did not get this part "which loss > concealment (using V) was applied" (Missing reference ?) > > 6. Same comment as above for definition of FFSC > > Thanks > Vinayak > > 1. > https://en.wikipedia.org/wiki/Video_compression_picture_types#Intra_coded_ > frames.2Fslices_.28I.E2.80.91frames.2Fslices_or_Key_frames.29 > 2. https://en.wikipedia.org/wiki/Reed%E2%80%93Solomon_error_correction > > On Thu, Aug 13, 2015 at 6:19 PM, MORTON, ALFRED C (AL) > <acmorton@att.com> wrote: > > Thanks for your request, Dan. > > > > Who will volunteer to do this review? > > > > Al > > pmdir admin > > > >> -----Original Message----- > >> From: pm-dir [mailto:pm-dir-bounces@ietf.org] On Behalf Of Romascanu, > >> Dan (Dan) > >> Sent: Thursday, August 13, 2015 8:47 AM > >> To: pm-dir@ietf.org > >> Cc: shida@ntt-at.com; Benoit Claise (bclaise@cisco.com); > >> alissa@cooperw.in > >> Subject: [pm-dir] request for an RFC 6390 review of > >> https://www.ietf.org/id/draft-ietf-xrblock-rtcp-xr-video-lc-01.txt > >> > >> > >> Hi PMDIR, > >> > >> As a co-chair of XRBLOCK WG, I would like to request the an RFC 6390 > >> review of > >> https://www.ietf.org/id/draft-ietf-xrblock-rtcp-xr-video-lc- > >> 01.txt. This document is in WGLC until 9/4. > >> > >> Thanks and Regards, > >> > >> Dan > >> > >> > >> _______________________________________________ > >> pm-dir mailing list > >> pm-dir@ietf.org > >> https://www.ietf.org/mailman/listinfo/pm-dir > > > > _______________________________________________ > > pm-dir mailing list > > pm-dir@ietf.org > > https://www.ietf.org/mailman/listinfo/pm-dir > > _______________________________________________ > pm-dir mailing list > pm-dir@ietf.org > https://www.ietf.org/mailman/listinfo/pm-dir
- [pm-dir] request for an RFC 6390 review of https:… Romascanu, Dan (Dan)
- Re: [pm-dir] request for an RFC 6390 review of ht… MORTON, ALFRED C (AL)
- Re: [pm-dir] request for an RFC 6390 review of ht… Vinayak Hegde
- Re: [pm-dir] request for an RFC 6390 review of ht… MORTON, ALFRED C (AL)
- Re: [pm-dir] request for an RFC 6390 review of ht… Qin Wu
- Re: [pm-dir] request for an RFC 6390 review of ht… Vinayak Hegde
- Re: [pm-dir] request for an RFC 6390 review of ht… Qin Wu
- Re: [pm-dir] request for an RFC 6390 review of ht… Romascanu, Dan (Dan)
- Re: [pm-dir] request for an RFC 6390 review of ht… Qin Wu
- Re: [pm-dir] request for an RFC 6390 review of ht… Qin Wu
- Re: [pm-dir] request for an RFC 6390 review of ht… Qin Wu
- Re: [pm-dir] request for an RFC 6390 review of ht… Vinayak Hegde
- [pm-dir] [xrblock] RE: request for an RFC 6390 re… Huangyihong (Rachel)
- Re: [pm-dir] request for an RFC 6390 review of ht… Huangyihong (Rachel)