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Content for  TR 26.998  Word version:  18.1.0

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6.5.6 Content formats and codecs  6.5.7 Summary of AR conversational instantiations  6.5.8 Standardization areas 
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6.5.6  Content formats and codecs  p. 86

Based on the use cases, the following formats, codecs, and packaging formats are of relevance for AR conversational:
  • General
    • 2D Video Formats and video compression codecs
    • Audio Formats and audio compression codecs supporting mono, stereo, and/or spatial audio
  • In addition, for downlink
    • Immersive media 3D Formats such as static and dynamic point clouds or meshes
    • Decoding tools for such formats
    • Composed Scene Graph and Scene Description
  • In addition, for uplink
    • Immersive media 2D Video Formats with depth
    • Immersive media 3D Formats such as static and dynamic point clouds or meshes
    • Encoding tools for such formats
    • Streaming of sensor information (e.g., gyroscope, accelerometer) as well as pose information
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6.5.7  Summary of AR conversational instantiations  p. 86

Table 6.5.7-1 shows the list of potential instantiations and how they may be composed from each building block described in clause 6.5.1.
Building Block Instantiation#1:
MTSI extension		 Instantiation#2:
DCMTSI extension
Call setup and controlConventional MTSIConventional MTSI with Data Channel
Media Formatsas specified in clause 6.5.6as specified in clause 6.5.6
DeliveryRTP/UDP/IP, SCTP/DTLS/UDP/IPRTP/UDP/IP, SCTP/DTLS/UDP/IP
5G system integrationNeed policy exchange for AR-(DC)MTSI client (P-CSCF and PCF)Need policy exchange for EDGAR-DCMTSI client (P-CSCF and PCF)
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6.5.8  Standardization areas  p. 87

The list of potential standardization area that has been collected is provided in the following:
  • Immersive media format and profile with integration into relevant 5G architecture
  • Scene description format, functionality, and profile as an entry point of immersive media
  • Scene description update mechanism
  • Relevant subset of media codecs for different media types and formats
  • CMAF encapsulation of immersive media for 5G media streaming
  • Media payload format to be mapped into RTP streams
  • Capability exchange mechanism and relevant signalling (e.g., SDP)
  • Protocol stack and content delivery protocol for various architecture options as identified in Table 6.5.3-1
  • Functionalities to support split rendering and network-based media processing allocation with 5G edge/MRF
  • Required QoS and QoE for AR/MR conversational service
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