Re: [webrtc-svc] [Question] Difference between SVC and Simulcast (#60)

>The difference between simulcast and SVC can be seen in the dependency diagrams. A frame in a simulcast layer depends only on other frames in that same layer, whereas in SVC a higher layer can depend on a lower layer.

This must mean that all SxTy modes refer to simulcast streams not SVC ones with multiple spatial layers.

This must also mean that there is no possibility to send SVC stream with at least two spatial layers using one RTP stream (one SSRC) because:
* all LxTy scalability modes mean sending spatial layers using separate RTP streams (different SSRCs)
* all SxTy scalability modes mean sending SIMULCAST STREAMS (not SVC stream with multiple spatial layers)  using one RTP stream 

Also, why can't we use S3T3 instead of L1T3 for the previous example? The only reason I can see is that VP8 RTP payload format doesn't support sending multiple encodings using one RTP stream.

P.S. Thank you for the links! 

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Received on Saturday, 8 January 2022 16:50:51 UTC