Re: Revision of Scalable Video Coding Extension for WebRTC

I have also one further question, are the modes not using interlayer 
dependency really interesting for us?

 From the AV1 spec, when no inter layer dependency is used the second 
(and next) spatial layer does not use its corresponding base layer as a 
reference. I understand that this is interesting from an encoder 
perspective, so can produce both spatial layers with the same encoder, 
but it wouldn't make sense for us to send them over the same ssrc, but 
on different simulcasts stream instead.

Best regards
Sergio

On 10/10/2018 0:49, Bernard Aboba wrote:
>
> The proposed SVC Extension for WebRTC has been revised in order to 
> reduce the complexity for developers wishing to support Scalable Video 
> Coding.
>
>
> The new proposal relies on the concept of "scalability modes" utilized 
> in [AV1] as well as other SVC codecs.
>
>
> The revised proposal is here:
>
> https://rawgit.com/aboba/webrtc-sim/master/svc.html
>
>
> Some slides describing the proposal and the logic behind it are 
> available here:
>
> https://docs.google.com/presentation/d/113UL2TpcXaYOmLw2GeDPjTqDeu2J5OWaqo_SYvzQvC4
>
>
> [AV1]
>     AV1 Bitstream and Decoding Process Specification
>     <https://aomediacodec.github.io/av1-spec/av1-spec.pdf>. Peter de
>     Rivaz; Jack Haughton. Alliance for Open Media. June 25, 2018. URL:
>     https://aomediacodec.github.io/av1-spec/av1-spec.pdf
>     <https://aomediacodec.github.io/av1-spec/av1-spec.pdf>
>