AHG reports
Number
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Session
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Title
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Source
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Dispositions
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m32586
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AHG report on MPEG-UD
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Sanghyun Joo
|
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m32595
|
|
MMT AhG Report
|
Imed Bouazizi
|
|
m32612
|
|
Report of the AHG on Green MPEG
|
Felix C. Fernandes, Xavier Ducloux
|
|
m32619
|
|
AHG on MPEG-DASH
|
Iraj Sodagar
|
|
m32621
|
|
AHG on file formats
|
David Singer
|
|
m32625
|
|
AHG on Timeline Alignment
|
Jean Le Feuvre (TELECOM ParisTech ), Youngkwon Lim (Samsung)
|
|
AHG reports are accepted.
General technical contributions
Number
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Session
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Title
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Source
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Dispositions
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m31788
|
Plenary
|
Table of Replies on ISO/IEC 13818-1:201X/FDAM 3
|
ITTF via SC 29 Secretariat
|
Noted
|
m31790
|
Plenary
|
Table of Replies on ISO/IEC 14496-12:2012/FDAM 2 & ISO/IEC 15444-12:2012/FDAM 2
|
ITTF via SC 29 Secretariat
|
Noted
|
m31791
|
Plenary
|
Table of Replies on ISO/IEC FDIS 14496-30
|
ITTF via SC 29 Secretariat
|
Noted
|
m32183
|
Plenary
|
Update to Audio part of ISO/IEC 23001-8 (CICP)
|
Max Neuendorf, Ingo Hofmann, Nikolaus Rettelbach, Christian Ertel
|
Noted
|
m32309
|
Plenary
|
MPEG Software assets
|
Christian Tulvan, Marius Preda
|
Noted
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
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Summary of discussion Demo
FAQ
.
AOB
None.
MPEG-2 Systems (13818-1) Topics ISO/IEC 13818-1:201x AMD 5 Transport of MVC depth video sub-bitstream and extensions to support HEVC low delay coding mode
This amendment to MPEG-2 systems specifies 3 functions:
-
It extends the MVC_extension_descriptor to explicitly signal the association between the 2 views of ‘stereoscopic MVC video’ with left or right eye for display on 3DTV devices. This explicit signaling was not available in earlier versions of MVC video standard or transport of MVC in MPEG-2 systems.
-
A ‘transport profile descriptor’ is defined to signal ‘adaptive profile’ such as one used by the DASH specification. The descriptor also defines the ‘complete profile’ which is the current default transport profile. The descriptor is used at a program level to indicate that the program contains a transport stream that may have constraints associated with adaptive streaming applications so that re-purposing systems can properly manage the re-multiplexing of this transport stream.
A new annex T that defines the ‘Mime types’ which are registered and commonly used for various MPEG defined elements has also been added.
ISO/IEC 13818-1:201x AMD 6 Delivery of Timeline for External Data
This amendment defines tools to identify and synchronize external data associated with an MPEG program in MPEG-2 transport streams. The tools allow:
- alignment of media timelines regardless of PCR discontinuities through a variety of possible time codes,
- signaling of URLs of associated data and their types (mime types, ISOBMFF, MPEG-DASH, MMT),
- announcement of upcoming associated data
ISO/IEC 13818-1:201x AMD7 Carriage of Scalable HEVC
Contributions
Number
|
Session
|
Title
|
Source
|
Dispositions
|
m31832
|
MPEG-2
|
Signalling of additional AAC profiles
|
Ingo Hofmann, Stephan Schreiner
|
Noted
|
m32295
|
MPEG-2
|
Carriage of HEVC multi-layer extension streams over MPEG-2 Systems
|
Y. Chen, Y.-K. Wang, Hendry(Qualcomm)
|
Accepted N14118
|
m32221
|
MPEG-2
|
On Transport of MV HEVC or SHVC over MPEG-2 Systems
|
Karsten Grüneberg, Thomas Schierl, Yago Sanchez
|
Accepted
N14118
|
m31817
|
MPEG-2
|
13818-1:2013/PDAM 6 - Delivery of Timeline for External Data
|
DVB
|
Accepted
N14117
|
m32287
|
MPEG-2
|
Update on 13818-1 DAM6
|
Jean Le Feuvre, Patrick Gendron on behalf of the H2B2VS project
|
Accepted
N14117
|
m32329
|
MPEG-2
|
Comments on 13818-1:2012 AMD8
|
Alex Giladi
|
Accepted
N14118
|
-
Action Points / Ballots
ITU-T H.222.0 (06/2012)|ISO/IEC 13818-1:2013/DAM 5
(SC 29 N 13749)
|
Systems
AMENDMENT 5: Transport of MVC depth video sub-bitstream and extensions to support HEVC low delay coding mode
|
DAM
(2014-01-31)
|
ITU-T H.222.0 (06/2012)|ISO/IEC 13818-1:2013/PDAM 6
(SC 29 N 13840)
|
Systems
AMENDMENT 6: AMENDMENT 6: Delivery of Timeline for External Data
|
PDAM
(2014-02-04)
|
MPEG-4 ISO Base File Format (14496-12) Topics ISO/IEC 14496-12:201X/AMD 3: Font streams and other improvements to file format
ISO/IEC 14496-12:201X/AMD 4: Enhanced audio support
This amendment enhances the codec-independent support for audio in the file format, adding the ability to declare downmixing and dynamic range control of audio, and describe the loudness of the program, before or after downmix or dynamic range control. It also supports the codec-independent declaration of channel layout, and identifying the carriage of DRC coefficients both in the audio stream, and in a separate track.
Contributions
Number
|
Session
|
Title
|
Source
|
Dispositions
|
m31833
|
File Format
|
Signalling of SAP types in the ISOBMFF
|
Ingo Hofmann
|
Accepted
N14121
|
m32258
|
File Format
|
Looped presentation of media in ISOBMFF tracks
|
Vinod Kumar Malamal Vadakital, Miska M. Hannuksela
|
Accepted
N14148
|
m32272
|
File Format
|
Improved audio support in the ISO base media file format (14496-12)
|
David Singer, Frank Baumgarte,
|
Noted
|
m32311
|
File Format
|
Updating the conformance tracking for the file format
|
David Singer
|
Accepted
N14276
|
m32512
|
File Format
|
Updates for Study text of 14496-12:2012 DAM3
|
Mitsuhiro Hirabayashi
|
Accepted
N14120
|
Summary of discussions m31833 Signalling of SAP types in the ISOBMFF
Into the WD of AMD.4, but delete the last sentence (sample groups already cover ‘not assigned to a group of this type’). We note it would be good to have a way to define sample groups that work for any track type. We would also like ‘common names’ for the various SAP types. Let’s align the sap type field with the segment index box.
m32258 Looped presentation of media in ISOBMFF tracks
Into the still image draft, but we can simplify a little as tracks with edit lists have defined durations.
m32512 Updates for Study text of 14496-12:2012 DAM3
Into the study but we need a new iso8 brand.
m32272 Improved audio support in the ISO base media file format (14496-12)
The contribution points out that DRC as used in 3D Audio requires quite a rich set of metadata. Furthermore, that metadata could be in the MP4-FF boxes or in the audio Track (i.e. Elementary Stream or ES). The presenter stated that, in principle, the DRC metada should not be stored twice in the MP4-FF (i.e. in the FF boxes and the Elementary Stream).
The contribution is a proposed amendment to 14496-12, with boxed defined to support DRC. There are a number of issues:
-
Define how to carry DRC in FF boxes (which is done)
-
Define how to carry DRC in ES (which will be done by Audio)
-
If DRC is in ES, define what might need to be duplicated in FF.
-
Consider how to use a FF Hint Track to dynamically move DRC in FF to DRC in ES.
Agreed action items:
-
Jointly approve new WD of this document
-
Workplan from Audio which contains “study points” for audio experts.
-
Investigate tracked-changes comment in WD document
-
Address minimum “redundant metadata” that is to be both FF and ES.
-
Consider software that could use hint track to automatically take FF level information into ES.
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