Organisation internationale de normalisation

Production-side zoom control CE

Minoru Tsuji, Sony, presented

m36467

Production-side zoom control CE for 3D Audio

Minoru Tsuji, Toru Chinen, Yuki Yamamoto

In the contribution, concerns raised at the 111^th MPEG meeting were addressed. It builds upon Spatial Relationship Description (SRD) and addresses the following issues:

• 
  Video zoom control without lowering resolution
  

• 
  Spatial Relationship Description (SRD)
  
• 
  User-side zoom by SRD
  
• 
  Production-side zoom by SRD
  
• 
  Production-side zoom by Timed Metadata
  

• 
  Transmission of zoom area information from TV to AV receiver
  
• 
  Production-side zoom control for 3D Audio
  

SRD is specified in MPEG-H HEVC specification. Using this information, the proposal can:

• 
  Simulcast normal and zoomed video streams.
  
• 
  Use timed metadata and two adaptation sets of DASH segments
  

The presenter asks that production-side zoom control be adopted into MPEG-H Phase 2.

The required changes to the audio specification are:

• 
  Audio_zoom_config() per Independancy Frame
  
• 
  Audio_zoom() per frame, about
  

• 
  80 b/s (no k) when no zoom active (1 zoom area)
  
• 
  90 kb/s when zoom active (1 zoom area)
  

Nils Peters, Qualcomm, noted that there might be a possibility of video zoom and audio zoom information will be in conflict.

The Chair asked if, given an edited video with zoom relative to the original video, can production-side zoom be put into same format as user-side audio zoom? This needs more discussion.

This proposal will continue to be discussed.