Organisation internationale de normalisation

4.2.4MPEG-D Unified Speech and Audio

The task group continued the discussions of the AhG. The Chair proposed two additional pieces of text, one for selection of VC and the other for the Requirements. Subgroup experts gave valuable feedback to correct and clarify the mathematical expressions. The Chair identified remaining open issues with these two excerpts from the Evaluations Guidelines document, and the open issues will be discussed in break out groups.

Later in the week, the Chair incorporated the new text into a revised version of the Evaluation Guidelines and added additional text for review. Identified open issues are:

• 
  Evaluated operating points (i.e. test results) used in the Requirements calculations
  
• 
  Evaluated operating points (i.e. test results) used in the Figure of Merit calculations
  

The open issues in the Evaluation Guidelines document were discussed in the task group on Thursday, and several new versions of the document were produced.

Friday the task group continued morning at 8AM. The group had the previous evening to review the last version of the Evaluation Guidelines document. The Chair presented that version of the document with the following additional changes and explained his motivation for the new text.

• 
  Editorial changes e.g to correct nomenclature and clarify the text.
  
• 
  Changes to the Requirements and Figure of Merit sections that
  
  • 
    Remove the statistic for a subset of the tests
    
  • 
    Re-phrased the text so that the Requirements relate to the performance of the work item.
    

The Chair noted that

• 
  Samsung objects to the removal of the computation of thestatistic for a subset of the tests.
  
• 
  Ericsson objects to the re-phrasing of the Requirements and Figure of Merit text.
  

Considering how much time and effort was spend in the Audio Subgroup discussing this document, and how divergent were many of the expert positions, the Chair declared this document to represent the consensus of the Audio Subgroup.