Understanding PDU and NAL Units for S4-220424 Discussion
Explore support for offline discussions related to S4-220424 with insights into mapping modes, use cases, coding dependencies, and more surrounding PDU and NAL units. Dive into the details of possible mappings, parameter sets, dependencies, and fragmentation units to enhance your understanding of video coding concepts.
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Presentation Transcript
PDU and NAL units Support for offline discussion related to S4-220424
Mapping modes NAL unit NAL unit NAL unit NAL unit NAL unit NAL unit NAL unit NAL unit PDU PDU PDU PDU PDU PDU PDU PDU PDU Set PDU Set NAL unit NAL unit NAL unit NAL unit NAL unit NAL unit NAL unit NAL unit Possible ? PDU PDU PDU PDU PDU PDU PDU PDU PDU Set
Use cases slice any type any type any type SPS PPS Slice any type PDU PDU PDU PDU PDU PDU PDU PDU Parameter sets dependencies Fragmentation unit PDU Set PDU Set Inter-frame prediction dependencies Coded picture I slice P slice B slice P slice slice slice slice any type PDU PDU PDU PDU PDU PDU PDU PDU Multiple slices per coded picture PDU Set PDU Set
Summary Dependency use cases Dependency level Dependency type Multiple slices per coded picture Inside PDU set Coding dependency Parameter sets Inside PDU set if PS and referring slices in same PDU set, otherwise inter PDU set Coding and parsing dependencies Other non-VCL NAL unit type dependencies (e.g. SEI, VUI) More likely inter PDU set but also inside PDU set for frame-specific SEI. Post decoding dependencies (non decoder) Inter-frame prediction Intra PDU set if reference frame in same PDU set, otherwise Inter PDU set Coding dependency Fragmentation unit Inside PDU set Parsing dependencies Other?
