| 3D Audio Phase 2
Clemens Par, Suissaudec, presented
m32171
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Listening Test Site Documentation, Studio 22 of New Music Building 3D Research Laboratory of the Graduate Program in Sound Recording
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Wieslaw Woszczyk, Jonathan Hong, Clemens Par
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The contribution gives details on the McGill University 22.2 channel listening facility. This room conforms to the guidelines for listening rooms used in MPEG 3D Audio work. The presenter anticipated that it will be used in association with Suissaudec’s 3D Audio Phase 2 work.
Clemens Par, Suissaudec, presented
m32172
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Considerations Regarding MPEG-H 3D Audio Phase 2 Evaluation Procedures
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Clemens Par
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The contribution notes that a lower bitrates, explicit coding of LFE signals may not be possible. However, it would be feasible to use a bass management system to incorporate some LFE frequency components into the main channels.
The contribution further notes that differences in level are often perceived as differences is quality.
Therefore, the presenter asks for the following:
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That LFE be set to zero in all test items for phase 2
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That the following additional instructions be added to the listener instructions for phase 2:
“Any perceived difference in loudness from the open reference is required to be rated down.”
Audio experts noted that differences is level must always be scored down when recording the subjective rating. After considerable additional discussion, the Chair proposed the following as a next step:
The Audio subgroup looks forward to more information in a contribution to the next MPEG meeting concerning the LFE component of the Phase 2 test items.
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