Organisation internationale de normalisation

Further Discussion

It was the consensus of the Audio subgroup to incorporate Advanced Loudness Control technology into MPEG-H Phase 2.

Oliver Wuebbolt, Technicolor, presented

m36508

Layered Coding for HOA based content in MPEG-H 3D Audio

Oliver Wuebbolt, Alexander Krueger

The contribution reviews a Technicolor contribution in Phase 2 for an HOA scalable bitstream and associated processing. This is a new mode of operation using established HOA tools.

The presenter noted that this functionality was demonstrated to ATSC and was well received.

It was the consensus of the Audio subgroup to incorporate this HOA layer coding technology into MPEG-H Phase 2.
Max Neuendorf, FhG-IIS, presented

m36532

Statement regarding MPEG Reference Software Copyright Headers

Max Neuendorf, Thorsten Adelhardt, Caroline Steiert, Marc Gayer, Nikolaus FÌ_rber

The contribution states that FhG-IIS supports the continue use of the MPEG-4 style software copyright header, but this “conformance to ” generalized to “an MPEG standard.”

Further, FhG-IIS cannot at this time support the use of the MPEG BSD License. Finally, they note that calling the “MPEG BSD License” is confusing and problematic because the MPEG BSD License has text different from the “BSD License.”

Oliver, Technicolor

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  Notes that “Clear BSD License” might be better.
  

Adrian Murtaza, FhG-IIS, presented

m36522

Proposal for SAOC signaling update in MPEG-H 3D audio

Adrian Murtaza, Harald Fuchs

The contribution proposes a flag bit in the syntax that would signal that the SAOC downmix is suitable for presentation, and if so also signals a loudspeaker configuration to use to play our the SAOC downmix.

It was the consensus of the Audio subgroup to incorporate this HOA layer coding technology into MPEG-H Phase 2.

Sang Bae Chon, Samsung, presented

m36447

Proposed Internal Channel

Sang Bae Chon

The contribution proposes an “internal channel” that permits low complexity format conversion. This is most appropriate for stereo presentation. The presenter noted that stereo TV devices are pervasive in the marketplace, and that all TVs, tablets, smartphones are capable of stereo presentation.

The contribution notes that the format converter requires a covariance analysis, which has high complexity e.g. in the case of 22.2 to stereo conversion.

The contribution notes that complexity of the format convert is related to the number of format converter “input channels.”

The CE requires a new channel order, which can be signalled using current tools. The CE also requires a 1-bit flag in MPEG Surround configuration to signal that internal channel processing should be applied.

The Chair noted that this seems to be a technology that maintains subjective quality, perhaps requires a greater bitrate, and provides lower complexity.

Michael K, FhG-IIS, noted that the contribution does not seem to address the fact that the encoder interpolates MPEG Surround 212 parameters.

The Audio subgroup looks forward to more information at the next meeting such that this proposal would be a complete CE proposal.