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Re: [rtcweb] Support of video with different resolutions

Bernard Aboba <bernard_aboba@hotmail.com> Mon, 31 December 2012 18:51 UTC

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From: Bernard Aboba <bernard_aboba@hotmail.com>
To: Randell Jesup <randell-ietf@jesup.org>, "rtcweb@ietf.org" <rtcweb@ietf.org>
Date: Mon, 31 Dec 2012 10:51:38 -0800
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Subject: Re: [rtcweb] Support of video with different resolutions
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Randell said: 

>       * Temporal scalability produces a video stream that can be
>         decimated to different frame rates, with independent rate
>         targeting for each substream.
>       * Multiframe postprocessing can make visual quality more
>         consistent in the presence of frames that are of substantially
>         different quality than the surrounding frames, as in the
>         temporal scalability case and in some forced keyframe scenarios.
>       * Multiple-resolution encoding enables simultaneous encoding of
>         the same content at different resolutions, resulting in much
>         faster encoding than processing them separately.
> 
> This is both multicast and temporal scalability.

[BA] The above seems to suggest support for temporal, quality and spatial scalability. 
Did you really mean "multicast" (since that's out of scope of WebRTC)?

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