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
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Improved audio support in the ISO base media file format (14496-12)
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David Singer, Frank Baumgarte,
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MPEG-4
Systems
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This contribution will be presented in a joint meeting during the MPEG week.
Michael Kratschmer, FhG-IIS, presented
m32181
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Information on Integration of Loudness and DRC Technology in MPEG-H CO RM1
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Michael Kratschmer, Fabian Küch, Bernhard Neugebauer, Arne Borsum, Michael Meier, Christian Uhle, Adrian Murtaza
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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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