International organisation for standardisation organisation internationale de normalisation



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tarix02.01.2022
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Example Processing that includes original waveform, uni_drc() bitstreams and reference processed output waveforms.

The presenter will make his presentation slides available.

The Chair will give Frank Baumgarte SVN read/write privileges to that he can put the DRC software on the MPEG SVN server.

File Format Issues

David Singer, Apple, gave a presentation that showed how the DRC metadata could be used in a fairly complex application scenario. A mechanism to carry all of the DRC metadata in the MPEG File Format is defined in



m32272

Improved audio support in the ISO base media file format (14496-12)

David Singer, Frank Baumgarte,

MPEG-4
Systems

This contribution will be presented in a joint meeting during the MPEG week.

Michael Kratschmer, FhG-IIS, presented



m32181

Information on Integration of Loudness and DRC Technology in MPEG-H CO RM1

Michael Kratschmer, Fabian Küch, Bernhard Neugebauer, Arne Borsum, Michael Meier, Christian Uhle, Adrian Murtaza




The document gives a comprehensive description of how the DRC tool could be used in MPEG-H 3D Audio. The following figure gives an example of how DRC sets (e.g. DRC-1), Loudness Normalization (LN) and Peak Limiter (PL) could be used in a CO decoder when the core coder produces either single-band or multi-band (i.e. QMF) output.

The presenter proposes to put data in the following elements:

DRC metadata

static data in usacExtElementConfig()

dynamic data usacExtElement

Loudness metadata

data usacConfigElement

Downmix metadata

Default FC configuration full specified in decoder

Non-default FC configuration signalled in bitstream (or in Config?)

Note: FC is format converter (i.e. downmix matrix)

Discussion

It was agreed to take a day to consider and discuss the contribution prior to making any decision on adoption of proposed technology.




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