Re: [rtcweb] Fwd: New Version Notification for draft-fineberg-avtext-temporal-layer-ext-00.txt

Bernard,

Good question.  I'm not familiar enough with the parameter requirements 
of all other scalable codecs to be able to generalize. If you'd like to 
help specify them, I'd be fine revising the draft to generalize.

Regards,
Adam

On 7/17/13 8:26 PM, Bernard Aboba wrote:
> Since the need is not codec specific (e.g. it arises with any codec 
> supporting temporal, spatial and quality scalability), why
>  a VP8-specific RTP extension?
>
> ------------------------------------------------------------------------
> Date: Wed, 17 Jul 2013 17:09:46 -0700
> From: fineberg@vline.me
> To: rtcweb@ietf.org
> Subject: [rtcweb] Fwd: New Version Notification for 
> draft-fineberg-avtext-temporal-layer-ext-00.txt
>
> Hi,
>
> I'm working on WebRTC services and have found that while developing 
> services that forward VP8 video streams if we want to take advantage 
> of the VP8 temporal scaling we must get the temporal layer information 
> from the RTP header which requires us to decrypt the SRTP packets. 
> This is undesirable both because the middle-box needs to have access 
> to the keys as well as the because of the added overhead of the 
> decrypt/encrypt cycle. This draft proposes an RTP header extension 
> that will allow us to use the VP8 temporal layer information included 
> in the header extension and therefore do forwarding without SRTP 
> decryption. Comments welcome.
>
> Regards,
> Adam Fineberg
> fineberg at vline.com <mailto:fineberg%20at%20vline.com>
>
> -------- Original Message --------
> Subject: 	New Version Notification for 
> draft-fineberg-avtext-temporal-layer-ext-00.txt
> Date: 	Tue, 09 Jul 2013 10:02:05 -0700
> From: 	internet-drafts at ietf.org 
> <mailto:internet-drafts%20at%20ietf.org>
> To: 	Adam Fineberg<fineberg at vline.com> 
> <mailto:fineberg%20at%20vline.com>
>
>
>
> A new version of I-D, draft-fineberg-avtext-temporal-layer-ext-00.txt
> has been successfully submitted by Adam Fineberg and posted to the
> IETF repository.
>
> Filename:	 draft-fineberg-avtext-temporal-layer-ext
> Revision:	 00
> Title:		 A Real-Time Transport Protocol (RTP) Header Extension for VP8 Temporal Layer Information
> Creation date:	 2013-07-08
> Group:		 Individual Submission
> Number of pages: 6
> URL:http://www.ietf.org/internet-drafts/draft-fineberg-avtext-temporal-layer-ext-00.txt
> Status:http://datatracker.ietf.org/doc/draft-fineberg-avtext-temporal-layer-ext
> Htmlized:http://tools.ietf.org/html/draft-fineberg-avtext-temporal-layer-ext-00
>
>
> Abstract:
>     This document defines a mechanism by which packets of Real-Time
>     Tranport Protocol (RTP) video streams encoded with the VP8 codec can
>     indicate, in an RTP header extension, the temporal layer information
>     about the frame encoded in the RTP packet.  This information can be
>     used in a middlebox performing bandwidth management of streams
>     without requiring it to decrypt the streams.
>
> _______________________________________________ rtcweb mailing list 
> rtcweb@ietf.org https://www.ietf.org/mailman/listinfo/rtcweb

-- 
Regards,
Adam