SC-02-08 meeting, San Francisco, 2010-11

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 San Francisco, CA., US., 2010-11-05.

The meeting was convened by chair M. Yonge.

The agenda and the report of previous meeting, held in London, UK., 2010-05. were approved as written.

Open Projects

AES31-1-R Review of AES31-1-2001 (r2006): AES standard for network and file transfer of audio - Audio-file transfer and exchange - Part 1: Disk format
This document defines a disk format specification to maintain compatibility with as wide a user base as possible to facilitate audio-file transfer and exchange between differing systems. The document does not describe a complete disk format but provides enough information to choose a proprietary system that will maintain compatibility.

No action was requested or required

AES31-2-R Review of AES31-2-2006: Audio-file transfer and exchange - Part 2: File Format for Transferring Digital Audio Data Between Systems of Different Type and Manufacture
This standard defines a file format for interchanging audio data between compliant equipment. It is primarily intended for audio applications in professional recording, production, post production, and archiving.

No action was requested or required. In discussion it was felt that the review of AES31-2 due in 2011 would merge and reaffirm the document with Amendment 1 published earlier this year.

AES31-3-R Review of AES31-3-2008, 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 standard provides a convention for expressing edit data in text form in a manner that enables simple and accurate computer parsing while retaining human readability. It also describes a method for expressing time-code information in character notation. It supports common professional audio sampling frequencies, video frame rates, and film framing. This document addresses the core need of the AES31 series of standards in providing a simple but extensible system for passing audio material between systems.

No action was requested or required

Development Projects

AES-X188 Screen-less navigation for high-resolution audio on Blu-ray Discs
This project is scoped to recommend a method for authoring an audio-only Blu-ray Disc to enable playback in screen-less consumer systems, and to provide simple stream and track selection using the remote control of a normal Blu-ray Disc player.

A revised draft for an Information Document was discussed and further revised to address informal comments received prior to CFC for standard. The new intent for this project is an Information Document.


J. Yoshio reported that, as expected, a new International form of Broadcast Wave has been standardised in JEITA. This uses a "ubxt" chunk to carry the same machine-readable metadata as the EBU and AES 'bext" chunk, while the human readable information uses multi-byte character sets to display Japanese characters and, potentially, multi-byte character sets for other languages.

It was also reported that a new EBU group has been preparing to revise their Broadcast Wave specification to include (for example) loudness metadata. The group expressed the wish that this revision work would not make any substantive change to the standard "bext" chunk.

New Projects

No new projects were proposed

New Business

There was no new business The next meeting will be scheduled in conjunction with the AES 130th Convention to be held in London, UK., 21-24 May 2011.

AES - Audio Engineering Society