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Contributions





Number

Session

Title

Source

Dispositions

m32255

File Format

Sync Sample Signalling in Multi-Layered HEVC Extensions

Vinod Kumar Malamal Vadakital, Miska M. Hannuksela

Noted

m32256

File Format

Signalling of Region of Interest Enhancement layers in Layered HEVC

Vinod Kumar Malamal Vadakital, Miska M. Hannuksela

Rejected

m32257

File Format

Proposal for an unified 14496-15 annex for all multi-layered HEVC extensions

Vinod Kumar Malamal Vadakital, Miska M. Hannuksela

Accepted

N14123


m32260

File Format

File format extensions for multi-layered HEVC sequences

Vinod Kumar Malamal Vadakital, Miska M. Hannuksela

Noted

m32284

File Format

Clarifications on HEVC Tile Tracks

Jean Le Feuvre, Cyril Concolato, Franck Denoual, Frédéric Mazé, Eric Nassor

Accepted

N14123


m32285

File Format

Multi-Layer HEVC and Tile Tracks

Jean Le Feuvre, Cyril Concolato, Franck Denoual, Frédéric Mazé, Eric Nassor

Accepted

N14123


m32286

File Format

Multi-Layer HEVC Dependencies

Jean Le Feuvre, Cyril Concolato, Franck Denoual, Frédéric Mazé, Eric Nassor

Accepted

N14123

















































    1. Summary of discussions




      1. m32255 Sync Sample Signalling in Multi-Layered HEVC Extensions


We note that the ‘ras ‘ sample group provides similar functionality, and perhaps we might never have had a sync sample table if we had had sample groups back then. Rather than re-designing the sync sample box, we would prefer to point people at the mechanism we prefer. Indeed, we have a historical accumulation of tools here, and we could deprecate some in a scalable HEVC context (e.g. pre-roll sample groups). We note that the sync sample table does enable some codec-unaware operations (e.g. deriving parts of timelines, fragmentation at RAP boundaries). We prefer not to re-design the sync sample table.

We should check that part 12 is clear that a sync sample is both a decoding and presentation clean start.

We have ‘rap’, ‘sap’ (proposed), ‘ras’, ‘roll’, ‘sync’ sample groups, and the sync sample table; this is too many; we should try to simplify, with perhaps a new part 12 definition and some deprecation.

We want to study both these problems further.


      1. m32256 Signalling of Region of Interest Enhancement layers in Layered HEVC


It seems that the tracks all need to indicate precisely what they provide, within them. Providing a ‘fast hint’ in the track references seems like a dangerous door to open. If we want fast tagging, couldn’t it, or shouldn’t it, be a tag within the track rather than the nature of the reference.

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