S4-260188 - AI Summary

[FS_Avatar_Ph2_MED] Draft LS on MPEG I ARF compression aspects

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3GPP SA4 LS on Compression Aspects of MPEG-I ARF (ISO/IEC DIS 23090-39)

Document Overview

This is a Liaison Statement (LS) from 3GPP TSG SA WG4 to ISO/IEC JTC1/SC29/WG7 and WG3 regarding compression aspects of avatar representation formats for Release 20 work on avatar communication Phase 2.

Background Context

Release 19 Baseline

  • 3GPP SA4 has adopted ISO/IEC DIS 23090-39 (MPEG-I: Avatar Representation Formats) as the representation format for user avatars in avatar communication over IMS
  • This adoption is specified in TS 26.264 for Release 19
  • Limitation identified: Compression aspects of avatar data were not addressed in Release 19 because ISO/IEC DIS 23090-39 does not yet specify compression mechanisms

Release 20 Phase 2 Study

  • SA4 has initiated a Phase 2 study on avatar communication in Release 20
  • Key objective: Compression of static avatar data and animation data
  • Study conclusion timeline: SA4#137e meeting (August 24-28, 2026)
  • Normative work completion: March 2027

Technical Questions to ISO/IEC

SA4 is seeking clarification on two critical aspects:

Question 1: Existing MPEG Compression Technologies

Are there existing MPEG technologies that can be utilized to compress:
- Avatar static data (especially meshes)
- Avatar animation data including:
- Blend shape sets
- Skeletal animation
- Other animation-related information

Question 2: Integration Timeline

If such compression technologies exist:
- Are there plans to integrate them into ISO/IEC DIS 23090-39?
- What is the anticipated timeline for such integration in the context of 3GPP Release 20 schedule?

Requested Action

SA4 formally requests ISO/IEC SC29/WG7 and ISO/IEC SC29/WG3 to provide answers to both questions above, considering the Release 20 timeline constraints.

Document Information
TDoc:
S4-260188
Source:
Nokia
Type:
discussion
For:
Agreement
Original Document:
View on 3GPP
Title: [FS_Avatar_Ph2_MED] Draft LS on MPEG I ARF compression aspects
Agenda item: 9.8
Agenda item description: FS_Avatar_Ph2_MED (Study on Avatar communication Phase 2)
Doc type: discussion
For action: Agreement
Contact: Gazi Karam Illahi
Uploaded: 2026-02-03T18:09:48.220000
Contact ID: 101579
Revised to: S4-260376
TDoc Status: revised
Reservation date: 03/02/2026 16:39:56
Agenda item sort order: 43