International organisation for standardisation organisation internationale de normalisation

Audio and Systems: Descriptors and Synchronization (Wed 1230-1300)

Descriptor for 3D Audio

• 
  Profile and Level (i.e. coder)
  
• 
  Number of audio channels
  
• 
  Languages (use existing Systems descriptor)
  
• 
  Ancillary services (i.e. visually impaired, existing Systems support)
  
• 
  Dialog enhancement capability
  

Audio experts will study and make a proposal.

Audio would like to synchronization to a resolution of “lip synch”

• 
  FF synchronization – edit list gives time zero, access unit gives time scale.
  
• 
  TS synchronization – break-in does not give “time zero”
  

Audio will work with Systems

• 
  Audio will capture current proposal and solution put it into the Systems output document. This needs carefully written requirements and perhaps also conformance points for the target application scenario. For example:
  
  • 
    Input to TS creator
    
  • 
    IP content definition
    
  • 
    Synchronization output
    
• 
  Systems Amd 6
  
• 
  MPEG-H Systems, CI part 11
  

Audio action is to consider adding new MPEG-4 profiles and levels to a Systems amendment.

3.