# Work Plan for Advanced Video Formats and Operation Points (FS_AVFOPS_MED)

## Document Overview

This document (S4-260130) from Xiaomi proposes a work plan for the Study Item on Advanced Video Formats and Operation Points (FS_AVFOPS_MED). The study focuses on identifying and documenting new video representation formats and their integration into 3GPP specifications, particularly TS 26.265.

## Study Objectives

The study item encompasses eight main objectives:

### Objective 1: New Representation Formats
- Identify relevant new representation formats not yet documented in TS 26.265
- Analyze benefits in terms of user experience
- Consider format specificities for:
  - Capture at interoperability point 2
  - Rendering at interoperability point 4
- Candidate representations include:
  - Support for alpha
  - Depth together with stereo
  - Additional colour subsampling (4:2:2 or 4:4:4)

### Objective 2: Video Signal Generation Feasibility
Study feasibility of generating video signals corresponding to the hypothetical optical system (interoperability point 2) by:
- **Sub-objective 2a**: Document requirements of real-time capturing systems to meet video signal characteristics (interface points 1a and 1b), including:
  - Temporal alignment of captured pictures
  - Frame rate
  - Bit depth
- **Sub-objective 2b**: Identify different types of video processing functions applied to video source signals from typical UE capturing systems, including the possibility of AI-based image generation (interoperability point 2)

### Objective 3: Compression Options
- Identify compression options for representation formats based on video codecs supported in 3GPP specifications
- **Priority codec**: HEVC (interoperability points 3 and 3bis)

### Objective 4: Transport System Integration
- Identify opportunities and needs to integrate representation formats into different transport systems:
  - Messaging
  - Real-time communication
  - Split rendering
  - Streaming formats
- Applies to interoperability points 3 and 3bis

### Objective 5: Traffic Characteristics
- Define expected traffic characteristics for new representation formats to meet certain quality thresholds

### Objective 6: Bitstream Conformance Environment
- Further develop the bitstream conformance environment, including:
  - Hosting
  - Tooling and process
- Collect sample bitstreams illustrating the new representation formats identified in Objective 1

### Objective 7: Gap Identification
Identify gaps in specifications and provide guidance:
- **In 3GPP specifications**: Especially on operation points, provide guidance for potential normative work
- **In other SDO specifications** (e.g., MPEG): Coordinate possible actions with relevant SDOs

### Objective 8: Coordination with External Organizations
- Perform work in coordination with related SDOs and industrial fora:
  - MPEG
  - SVTA
  - CTA-WAVE
  - IETF
- Reference related specifications:
  - Common Media Application Format (CMAF)
  - ISO base media file format (ISOBMFF)

## Study Working Methods

### Contribution Process
The study adopts the following working methods:
- Individual CRs created for specific aspects of work (e.g., one CR per new scenario)
- A merged CR will be created at the end of the study to compile all changes to TR 26.966
- Company proposals to progress CRs submitted as "discussion" TDocs
- Upon agreement, the responsible person of the CR implements the agreement

### Current CR Status

Three CRs are currently in progress:

| CR | Title | Latest TDoc | Clause | Responsible |
|---|---|---|---|---|
| 0001r12 | New scenario: Video with changeable background | S4-252016 / S4aV250069 | 5.6 (new) | Emmanuel Thomas |
| 0002r12 | New scenario: Refocusable video | S4aV250071 / S4-252018 | 5.7 (new) | Emmanuel Thomas |
| 0003 | New scenario: Video with semantic segmentation map | S4aV250072 | 5.8 (new) | Emmanuel Thomas |

## Detailed Work Plan Timeline

### SA4#134 (November 17-21, 2025, Dallas, US)
- Start work on objectives 1, 2, and 3
- If needed, communicate with external organizations (objective 8)

### Video SWG AHG Telco (December 16, 2025)
- Continue work on objectives 1, 2, and 3
- Submission deadline: December 15, 3pm CET
- Host: Qualcomm

### SA4#135 (February 9-13, 2026, Goa, IN) - Current Meeting
- Continue work on objectives 1, 2, and 3
- If needed, communicate with external organizations (objective 8)

### Video SWG AHG Telcos (TBD 2026)
Three telcos planned (dates TBD):
- First two telcos: Continue work on objectives 1, 2, and 3
- Third telco: 
  - Continue work on objectives 1, 2, and 3
  - **Start work on objectives 4, 5, 6, and 7**
- Host: Qualcomm

### SA#111 (March 10-13, 2026, Fukuoka, JP)
- No action

### SA4#135-bis-e (April 13-17, 2026)
- Continue work on objectives 4, 5, 6, and 7
- If needed, communicate with external organizations (objective 8)

### SA4#136 (May 11-15, 2026, Montreal, CA)
- **Complete work on all objectives 1 to 7**
- If needed, communicate with external organizations (objective 8)
- Endorsement of Work Item Summary

### SA#112 (June 9-12, 2026, Singapore, SG)
- **Approval of CR to TR 26.966**

## Proposal

The document proposes to agree on the work plan provided in the timeline above.