Report of the meeting of the SC-02-12 Working Group on Audio Applications of Networks of the SC-02 Subcommittee on Digital Audio, held online in connection with the 156th Convention, 2024-05-24.
The meeting was convened by chair Kevin Gross.
The formal notice on patent policy was read.
The report of the previous meeting, held online, in connection with the 155th Convention, 2023-10-13, was approved as written.
The agenda was approved as posted.
In attendence were Richard Cabot, Kevin Gross, Andy Rosen, Jeff Berryman, Paul Treleaven, Nicolas Sturmel, Junichi Yoshio, Kent Terry, John Grant, David Bialik, Gints Linus, Bruce Olson, Andreas Hildebrand, Hitano Wataru, Tim Habedank, Peter Stevens
AES67-R - Review of AES67-2018 , AES standard for audio applications of networks - High-performance streaming audio-over-IP interoperability
The revision was published in late 2023
Gints Linis has found some editroial errors and will forward these to Rich Cabot. A corrected version will be issued as a new printing of AES67-2023
AES70-1-R Review of AES70-1-2018: AES standard for audio applications of networks - Open Control Architecture - Part 1: Framework
AES70-2-R Review of AES70-2-2018: AES standard for audio applications of networks - Open Control Architecture - Part 2: Class structure
AES70-3-R Review of AES70-3-2018: AES standard for audio applications of networks - Open Control Architecture - Part 3: Protocol for TCP/IP networks
No discussion as all 3 documents are in public comment until 31 May 2024.
A new project under the AES70 umbrella will soon be initiated. It specifies a JSON version of the protocol and will likely result in a standard named AES70-4.
AES74-R Review of AES74-2019 AES standard for audio applications of networks -
Requirements for Media Network Directories and Directory Services
The task group porposes to withdraw this standard as it is now out of date. Kevin Gross to put an email announcement to this effect on the SC-02-12 reflector.
AES-X242 Streaming audio metadata over IP
AES-X242 is targeted to normatively reference SMPTE ST 2110-41 which has now been published. AES-X242 is now ready to move forward and Kent Terry will schedule a meeting to move the project forward.
Unfortunately, Dolby will no longer be supporting this effort so Kent Terry's ability to drive the project is limited.
David Bialik has written two metadata papers and will share them on the task group reflector
AES-X243 Audio applications of networks - Using AES70 for managing AES67 and SMPTEST 2110-30 media stream connections
Work was completed immediately prior to this SC-02-12 meeting and will be available soon. It will be published as AES70-21.
AES-X252 AES70 Milan Adaptation
Work was completed immediately prior to this SC-02-12 meeting and will be available soon. It will be published as AES70-22.
AES-X258 Using AES70 to manage Audinate Dante® media transport
High level design brief is being developed within the OCA Alliance. This one will have most work done within the AES group (SC 02-12L) based on the design brief from the OCA Alliance. This structure will enable Audinate to participate in the process as they wouldn’t be able to do that in the OCA Alliance.
Liaisons:
Liaison with ST 2059 (SMPTE) (Use of PTP for professional media sync.) (Paul Treleaven)
The 2019 revision of IEEE1588 changes the way TLV’s are transported. As SMPTE use TLV’s for logging of time code, some work is required to make sure that support for both the old and the new method is supported.
Liaison with ST 2010 (SMPTE) (Paul Treleaven)
SMPTE is working on 2110-11 timing planes, link offset and delay compensation.
UWB audio (John Grant)
A UWB audio initiative based on IEEE 15.4 is moving forward in SC-02-02. The UWB audio transport works a low layers of the UWB network. There is no involvement of SC-02-12 at this time and none has been requested.
Next Meeting
The next meeting will be scheduled in conjunction with the AES 157th Convention in early October 2024, it will be virtual. Standard meetings will likely be scheduled the week before the actual show.
