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[rmcat] WGLC comments on draft-ietf-rmcat-coupled-cc-03

Ingemar Johansson S <ingemar.s.johansson@ericsson.com> Thu, 08 September 2016 13:28 UTC

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From: Ingemar Johansson S <ingemar.s.johansson@ericsson.com>
To: "safiquli@ifi.uio.no" <safiquli@ifi.uio.no>, "Mmichawe@ifi.uio.no" <Mmichawe@ifi.uio.no>, "steing@ifi.uio.no" <steing@ifi.uio.no>, "'rmcat-chairs@tools.ietf.org'" <rmcat-chairs@tools.ietf.org>
Thread-Topic: WGLC comments on draft-ietf-rmcat-coupled-cc-03
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Date: Thu, 08 Sep 2016 13:16:55 +0000
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Cc: "rmcat WG (rmcat@ietf.org)" <rmcat@ietf.org>
Subject: [rmcat] WGLC comments on draft-ietf-rmcat-coupled-cc-03
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Hi

I have read through draft-ietf-rmcat-coupled-cc-03, just a few comments.

List of variables :
I find myself scrolling forth and back in the document I search for an explanation to all the variables, perhaps a dedicated list of variables and their meaning would be good ?

Section 5.3.1 :
My understanding here is that this algorithm does assume that the media coder will produce an output bitrate that is FSE_R. In reality the output rate from a video coder may be considerably lower than the target if for instance the image is more or less static. I guess that the means that bandwidth becomes unallocated or ? .
It seems like this "underutilization problem" is  discussed in Appendix B where the "desired rate" is mention, is this DR to be set equal to the video coder output rate ?

/Ingemar
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Ingemar Johansson  M.Sc.
Master Researcher

Ericsson AB
Wireless Access Networks
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ingemar.s.johansson@ericsson.com<mailto:ingemar.s.johansson@ericsson.com>
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