5.2.3MPEG-D SAOC
Yang-Won Jung, LG, presented
m15588
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Comments on SAOC operation modes and module
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Yang-Won Jung
Henney Oh
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This contribution notes that there a number of “missing” modes in SAOC operation, and presents a table summarizing the currently supported modes and the proposed “missing” modes. Discussion was deferred until after the next presentation.
Oliver Hellmuth, FhG. presented
m15634
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Proposal for adoption of additional downmix / upmix scenarios for the MPEG SAOC system
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hel @ iis.fraunhofer.de
hlp @ iis.fraunhofer.de
mun @ iis.fraunhofer.de
fch @ iis.fraunhofer.de
tev @ iis.fraunhofer.de
heiko.purnhagen @ dolby.com
JENGD @ dolby.com
jeroen.koppens @ philips.com
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This contribution proposes adding the same modes to SAOC as was proposed in the previous contribution. A mathematical description of the SAOC processing for the missing modes was presented. Furthermore, it proposes to explicitly describe how a SAOC decoder can be connected to a MPEG Surround decoder by means of a stream of unquantized parameters. Listening test data was presented that show that two of the missing modes implemented via an SAOC decoder operate as well as the implementation of SAOC transcoder plus MPEG Surround decoder. All modes except stereo to binaural have software implementation.
It was the consensus of the Audio Subgroup that all modes except stereo to binaural processing be incorporated into the CD text. Also, that the text describing how a SAOC decoder can be connected to a MPEG Surround decoder by means of a stream of unquantized parameters be incorporated into the CD text.
Leonid Terentiev, FhG, presented
m15636
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Proposal for the file-based storage of rendering information for the MPEG SAOC system
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Jonas Engdegård
Leonid Terentiev
Cornelia Falch
Oliver Hellmuth
Johannes Hilpert
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The contribution presents a format for storing and retrieving the rendering information. It was the consensus of the Audio Subgroup to incorporate this text into the SAOC CD text.
Osamu Shimada, NEC, presented
m15576
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A Proposal on preset functionality for teleconferencing application
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Osamu Shimada
Keisuke Masatoki
Toshiyuki Nomura
Akihiko Sugiyama
Osamu Hoshuyama
Hiroshi Saruwatari
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This contribution proposes to derive lateralization from the “cross-talk” of participants in a multi-microphone teleconferencing setting. It proposes that presets should be dynamic in time and frequency. This permits the decoder to reconstruct the original microphone signals, but still enable manipulation of the actual objects.
The Audio Subgroup welcomes additional information at the next meeting.
Leonid Terentiev, FhG, presented
m15633
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Additional information on the mono downmix mode for the enhanced Karaoke / Solo processing for the MPEG SAOC system
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Leonid Terentiev
Cornelia Falch
Oliver Hellmuth
Johannes Hilpert
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FhG will be able to provide processed signals for informal listening. The Chair suggested that this topic be brought up again Thursday afternoon of the MPEG week.
Heiko Purnhagen, Dolby, presented
m15635
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Report on corrections for the MPEG SAOC CD text
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Leonid Terentiev
Cornelia Falch
Oliver Hellmuth
Johannes Hilpert
Heiko Purnhagen
Jonas Engdegård
Jeroen Koppens
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This contribution presents
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Editorial corrections to the SAOC CD text.
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Minor technical “bug-fixes” to the CD text.
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New syntax text that clearly indicates that meta-data strings can be UTF-8 byte strings.
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Proposed solution for instability in SAOC processing noted at the 84th Meeting.
It was the consensus of the Audio Subgroup to adopt all aspects of the contribution into the SAOC CD text.
Yang-Won Jung, LGE, presented
m15587
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Proposed syntax revision for redundancy reduction in SAOC
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Yang-Won Jung
Henney Oh
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The contribution proposes syntax revisions that reduce the number of required bits in the SAOC audioSpecificConfig() header. Heiko Purnhagen, Dolby, noted that the proposed syntax was too restrictive and could not support the flexibility in the SAOC CD text. He agreed to draft alternate syntax text that captures the improvement in coding efficiency. This would include an example of bitrate savings in a typical application. No decision on this contribution is made at this time, but the topic will be revisited when the group reviewed the text from Dolby.
After subsequent discussion, it was the consensus of the Audio Subgroup to adopt the technology as it was in the presentation to the Audio Subgroup.
Jeongil Seo, ETRI, presented
m15592
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Proposal for support of the additional downmix by MPEG SAOC
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Jeongil Seo
Seungkwon Beack
Kyeongok Kang
Kwangki Kim
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The proposal shows how to adapt the artistic downmix gain concept from MPEG Surround to SAOC for the purpose of using a “Mastered Mix” to drive a SAOC decoder. The concept is proposed to be a new core experiment. A break-out will discuss the proposal and report back.
Osamu Shimada, NEC, presented
m15575
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Listening test results of Test 2 for SAOC CE on separating real-environment signals into multiple objects
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Osamu Shimada
Toshiyuki Nomura
Akihiko Sugiyama
Osamu Hoshuyama
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