[xrblock] FW: [MMUSIC] SDP directorate review of draft-ietf-xrblock-rtcp-xr-video-lc-01

"Huangyihong (Rachel)" <rachel.huang@huawei.com> Wed, 09 September 2015 00:31 UTC

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From: "Huangyihong (Rachel)" <rachel.huang@huawei.com>
To: "'xrblock'" <xrblock@ietf.org>
Thread-Topic: [xrblock] FW: [MMUSIC] SDP directorate review of draft-ietf-xrblock-rtcp-xr-video-lc-01
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Date: Wed, 9 Sep 2015 00:31:05 +0000
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Subject: [xrblock] FW: [MMUSIC] SDP directorate review of draft-ietf-xrblock-rtcp-xr-video-lc-01
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BR,
Rachel


-----Original Message-----
From: mmusic [mailto:mmusic-bounces@ietf.org] On Behalf Of Huangyihong (Rachel)
Sent: Monday, August 17, 2015 11:05 AM
To: Christer Holmberg; mmusic; Shida Schubert (shida@agnada.com); Romascanu, Dan (Dan); alissa@cooperw.in; mmusic-chairs@tools.ietf.org; draft-ietf-xrblock-rtcp-xr-video-lc.all@tools.ietf.org
Subject: Re: [MMUSIC] SDP directorate review of draft-ietf-xrblock-rtcp-xr-video-lc-01

Hi Christer,

Thanks for the SDP directorate review. Please see my answers inline.

BR,
Rachel

> -----Original Message-----
> From: Christer Holmberg [mailto:christer.holmberg@ericsson.com]
> Sent: Friday, August 14, 2015 5:36 PM
> To: mmusic; Shida Schubert (shida@agnada.com); Romascanu, Dan (Dan); 
> alissa@cooperw.in; mmusic-chairs@tools.ietf.org; 
> draft-ietf-xrblock-rtcp-xr-video-lc.all@tools.ietf.org
> Subject: SDP directorate review of 
> draft-ietf-xrblock-rtcp-xr-video-lc-01
> 
> (Sending again, with the correct e-mail addresses)
> 
> Hi,
> 
> I have done an SDP directorate review of draft-ietf-xrblock-rtcp-xr-video-lc-01.
> 
> In general I didn't find any major issues, but I do have a few 
> editorial comments that the authors may wish to address.
> 
> 
> Q1:
> 
> The text in section 5 says:
> 
> 	"However XR blocks MAY be used without prior signaling (see section 5 
> of [RFC3611])."
> 
> I suggest to remove the sentence, as the previous sentence refers to 
> RFC 3611 for the generic SDP considerations.
> 
> IF you want to keep the sentence, I think MAY should not be in capital 
> letters, as you are referring to a rule defined elsewhere.

[Rachel]: All right. We'll just delete this sentence.

> 
> 
> Q2:
> 
> In section 5.1, the value for the extension is defined as 
> "video-loss-concealment".
> 
> Couldn't it be shorter, e.g. simply "vlc"? The size of a typical SDP 
> message body is already very big, so...
> 
> Also, if you look as the XR blocks defined in RFC3611, they mostly use 
> abbreviations too.

[Rachel]: Okay. Abbreviations will be used in the next version.

> 
> 
> Q3:
> 
> The text in section 5.2 says:
> 
> 	"When SDP is used in offer-answer context, the SDP Offer/Answer usage
>    	defined in [RFC3611] for unilateral "rtcp-xr" attribute parameters
>    	applies.  For detailed usage of Offer/Answer for unilateral
>    	parameter, refer to section 5.2 of [RFC3611]."
> 
> I suggest to remove the second sentence. If you want to mention 
> section 5.2 of RFC3611, you can do that in the first sentence, e.g.:
> 
> 	"When SDP is used in offer-answer context, the SDP Offer/Answer usage
>    	defined in section 5.2 of [RFC3611] for unilateral "rtcp-xr" 
> attribute parameters
>    	applies."

[Rachel]: The modification looks good to me. Thanks for your suggestions.

> 
> Regards,
> 
> Christer

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