SC-02-08 meeting, Dublin, Ireland, 2019-03

Report of the meeting of the SC-02-08 Working Group on audio file transfer and exchange of the SC-02 Subcommittee on Digital Audio, held in Dublin, Ireland, 2019-03-22

The meeting was convened remotely by Mark Yonge.

The formal notice on patent policy was read.

The agenda and the report of the previous meeting, held in New York, NY, 2018-10-19 were approved as written.

In attendence were M Yonge*, U Henry*, P Treleaven, I Dennis, S Norcross, P Majdak, H Morfett-Jones, J Woodgate, J Yoshio, R Cabot (* denotes by electronic link).

Projects assigned to this group but not mentioned here had no action requested or required - see for details.

Development Projects

AES-X236 - IEC 62942 liaison, IEC 62942 liaison, Broadcast Wave Format file
Scope: Adoption of AES31-2 as an IEC standard for broadcast wave format file, with addition of optional UBXT chunk to carry international character sets.
The CDV for IEC 62942 was approved. The International Standard will be published in English and French before the end of 2019.

Open Projects

AES31-2-R Review of AES31-2-2012 Audio-file transfer and exchange - Part 2: File Format for Transferring Digital Audio Data Between Systems of Different Type and Manufacture
The Call for Comment on draft revised AES31-3 was published on 2019-02-23 and will close of 2019-04-06. There was no other discussion.

AES31-3-R Review of AES31-3-2008 (r2013), AES standard for network and file transfer of audio - Audio-file transfer and exchange - Part 3: Simple project interchange. including maintenance of annex F.
This project is due for review in 2019. The meeting discussed possible areas for revision. Ultan Henry mentioned that an identifier for an AES31-3 ADL list listed in clause still needed a clear definition. The standard requires a SMPTE label which has not been registered. As a result, some implementers have used a random string to fill this identifier. It was proposed that a registry value be obtained by the time of the spring Convention, or some other approach explored.

A Call for Comment on Reaffirmation of AES31-3-2008 was published 2019-02-07 and has just closed. There were two outstanding proposals for revision of this reaffirmed document.

The identifier for an AES31-3 ADL list listed in clause still needs a clear definition. M. Yonge agreed to propose a solution before the next meeting.

There was a brief discussion of including higher sampling frequencies and video frame rates in AES31-3. U. Henry felt that this could not accomplished by simple changes to the existing standard and so further action was deferred.

AES69-R Review of AES69-2015: AES standard for file exchange - Spatial acoustic data file format
This document is due for review by 2020. P. Majdak indicated that new annexes will be proposed in the near future, together with minor changes to the text of the standard. The meeting noted with interest that this standard is now being used in a number of significant applications, including audio for computer games.


No new liaison information

New projects

No new projects were proposed.

New business

No new business was proposed.

The next meeting will be scheduled in conjunction with the AES 147th Convention, to be held October 2019 in New York, NY, US.

AES - Audio Engineering Society