International organisation for standardisation organisation internationale de normalisation

Codec ID	Core Coder	Description	Total Bitrate (kbps)
N8851 Reference
REF	-	Original 5.1 channel items	-	Table 6
HE-AAC _MC_A	HE-AAC	High bitrate reference case, HE-AAC discrete	160	Table 1
AAC_MPS_MTX	AAC	AAC_MPS decoded with MPS in Enhanced Matrix Mode.	160	Table 3
AAC_DPL2	AAC	High bitrate reference case, DPL2 downmix encoded with AAC stereo. Decoded with DPL2	160	Table 3
LP35	-	Low pass anchor (based on 5.1 original)	-	Table 1

The Chair notes that all items in the table above use a stereo core coder, while the Swissaudec may choose to use a mono core coder, in which case the items will be re-coded from the originals.

It is expected that any subjective performance results will use the MUSHRA test methodology, and Audio experts strongly urged Swissaudec to include the 3.5 kHz lowpass filtered anchor in the systems under test, such that the test is a proper MUSHRA test methodology.

5.2Responses to Liaison and NB comments

Liaison statement and NB comment responses generated by Audio were presented and approved.

5.3Recommendations for final plenary

The Audio recommendations were presented and approved.

5.4Establishment of Ad-hoc Groups

The ad-hoc groups shown in the following table were established by the Audio subgroup. Unless otherwise indicated, Ad Hoc group meetings will be held at the location of the next MPEG meeting on the weekend preceding that meeting.

No.	Title	Mtg
N12613	AHG on 3D Audio and Audio Maintenance	No