‘temporal_group_temporal_switching_up_point_flag[i]’

[Rajeev Tiwari]

Folks, one quick question?
Can we consider a frame in the temporal group of an AV1 coded
bitstream with ‘temporal_group_temporal_switching_up_point_flag[i]’
equal to 1 as the equivalent of an STSA since it is providing a point
to switch from one temporal layer to another?

1. If yes, how can we show that STSA (a step-wise temporal sub-layer
access or STSA) picture (correspondence frame in AV1) be the lowest on
the temporal sub-layer.
2. Can we consider the i'th frame in the temporal group as the STSA
picture provided it should contain a picture from the second
scalability layer? I wish to check if the temporal group contains
information about the image of the scalability layer?

Thanks
Raj

[Rajeev Tiwari]

Good evening, Can someone provide any insights to my questions below?

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Thanks

Rajeev

[Rajeev Tiwari]

Wan-Teh Chang

Can you please provide some info or insights on this?

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Thanks

Rajeev

[James Zern]

Hi,

I'm not quite clear on the question here. The semantics are defined in the spec [1]. Do you have a more concrete example to illustrate the question?

[1] https://aomediacodec.github.io/av1-spec/#scalability-structure-semantics

 

Thanks
Raj

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