International organisation for standardisation organisation internationale de normalisation

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Profiles	Baseline profile
Low delay profile
Levels	1	2	3	4	1	2
Hybrid QMF bank	X	X	X	X	-	-
LD QMF bank	-	-	-	-	X	X
Residual decoding	-	-	X	X	-	-
Max sampling rate [kHz]	48	48	48	96	48	48
Max number of objects	8	32	32	32	8	32
Stereo downmix	X	X	X	X	-	X

The Chair suggested that:

• 
  in the table above that “Stereo downmix” be replaced by “Maximum number of downmix channels” and the table entries be “1” or “2” rather than “X” or “-.”
  
• 
  it be made very clear that it binaural rendering, and the associated interface for HRTF, must be supported.
  
• 
  it may be beneficial to have a means to mandate support for multi-channel output using MPEG Surround.
  

Jeongil Seo, ETRI, noted that Music 2.0 might require up to 16 objects rather than just 8 and require up to 4 residuals. It was also noted that it is important to specify levels whose complexity reflects the needs of the marketplace. Heiko Purnhagen, Dolby, showed an Excel spreadsheet that calculates complexity based on e.g. number of objects and residuals. A break-out will use this tool to refine the level definitions of the profiles and levels. The SAOC FCD text will be reviewed Thursday afternoon.

It was the consensus of the Audio Subgroup that the proposed text be incorporated into incorporated into the FCD text. Based on this consensus, the complexity for the profile and levels (found in m16680) will also be incorporated into the FCD text.

Oliver Hellmuth, FhG, presented

m16678

Proposal for a plan on SAOC verification testing

Jonas Engdegard, Oliver Hellmuth, Juergen Herre, Johannes Hilpert, Werner Oomen, Heiko Purnhagen, Leonid Terentiev

The contribution proposes two sets of tests, one oriented toward evaluating applications and the other toward evaluating technology. Each set is composed of a number of component tests, as shown below:

Application-oriented tests:

1. Interactive Remix oriented test-cases

A) Remix (Low Bitrate)

B) Karaoke (High Bitrate)

2. Teleconferencing oriented test-case with 4-5 talkers and a varying degree of doubletalk

A) Stereo loudspeaker presentation

B) 3-front 2-rear (5.0) loudspeaker presentation

Technology-oriented tests:

1) MCU Combiner

Details TBD

2) Binaural Rendering

Details TBD

It was the consensus of the Audio Subgroup to have as an output document a Draft SAOC Verification Test Plan. The Chair noted that the following schedule is anticipated:

• 
  issue final test plan at 90^th meeting (October)
  
• 
  conduct test near 1^st week of December
  
• 
  register and upload test report approx. 2^nd week of December
  
• 
  FCD ballot closes approx January 1
  

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