Organisation internationale de normalisation

4.2.2MPEG-D MPS

Andreas Schneider, Dolby, presented

m15154

Update on MPEG Surround Conformance

Andreas Schneider

This update is summarizes as follows:

• 
  Conformance text defines 32 sequences
  
• 
  These 32 sequences are combined with AAC and HE-AAAC as core coders, giving a total of 64 sequences, of which 42 are available and 38 are cross-checked.
  

It was the consensus of the Audio Subgroup to issue this work as FDAM with an editing period, but with only defining the 21 sequences that are available.

4.2.3MPEG-D SAOC

Yang-Won Jung, LG, presented

m15111

A proposed CE on object parameter estimation in SAOC

Yang-Won Jung Henney Oh

The contribution proposes to modify OLD estimation such that transmition of DMG is not required, thus achieving bitrate savings.

Oliver Hellmuth, FhG, noted that if DMG is not transmitted then it is not possible to recover the level (i.e. gain) of an object as input to the SAOC encoder. The Chair urged interested experts to discuss whether DMG in important for certain application scenarios and therefore should be available at the decoder.

Jeongil Seo, ETRI, presented

m15143

CE on efficient decoding of a controllable object and an MBO

Jeongil Seo Seungkwon Beack Kwang-ki Kim Kyoungok Kang

This contribution proposes an efficient decoding process for FGO or MBO solo application

Leonid Terentiev, FhG, asked for more details on the complexity reduction, which were provided on an additional slide. Oliver Hellmuth, FhG, noted that in a real-world implementation the full machinery of MPEG Surround would not be invoked, and hence the complexity figures presented by ETRI are not realistic.

The Chair noted that the CE as proposed delivers only “fair” subjective results on the MUSHRA scale but at the same time appears to also deliver lower complexity. Howerver, compared the the Karaoke CE that was reviewed in the AhG meeting, the ETRI proposal appears to deliver lower quality and lower complexity, which is typically not the basis for accepting new technology.

The Chair suggested that ETRI discuss these issues with the SAOC proponents and report back to the group.

The task group produced a Workplan for progressing the CE work which had the consensus of all CE participants.