Audio Engineering Society Standards Committee

May 2001 report of Sc-03-04

[Last printing 9 August 2001] Report of the SC-03-04 Working Group on Storage and Handling of Media of the SC-03 Subcommittee on the Preservation and Restoration of Audio Recording meeting, held in conjunction with the AES 110th Convention in Amsterdam, The Netherlands, 2001-05-12

Chair T. Sheldon convened the meeting. The agenda was amended to include a review of AES-X80 Liaison with ANSI/PIMA IT9-5 and approved. The report from the previous meeting were approved as written.

Current development projects

AES22-R Review of AES22-1997 AES recommended practice for audio preservation and restoration -- Storage of polyester-based magnetic tape

The WG has received no comments that cause it to take up the review of this standard at this time. The standard remains in maintenance mode with mandatory review scheduled in 2002.

AES28-R Review of AES28-1997 AES standard for Audio preservation and restoration -- Method for estimating life expectancy of compact discs (CD-ROM), based on effects of temperature and relative humidity

A CFC was issued on 2001-03-09. The CFC amends the standard by removing the minus signs in the exponent in the two equations in 6.1, and by removing the equation from B.5. Thus far no comments have been received by the secretariat.

It also was noted that the target date needs to be changed. The mandatory review should occur in 2002.

AES35-R Review of AES35-2000 AES standard for audio preservation and restoration -- Method for estimating life expectancy of magneto-optical (M-O) disks, based on effects of temperature and relative humidity.

The WG has received no comments that cause it to take up the review of this standard at this time. The standard remains in maintenance mode with mandatory review scheduled in 2005.

AES38-R Review of AES38-2000 AES standard for audio preservation and restoration -- Life expectancy of information stored in recordable compact disc systems -- Method for estimating, based on effects of temperature and relative humidity.

D. Schuller noted that light has much more impact to degrade compact discs than temperature and humidity. He indicated the need for research data on the light sensitivity of CDs. He called on the WG to encourage studies of light sensitivity, and then revise this standard at the earliest moment to include statements based on the results of that research. Sheldon agreed to present this view at the upcoming SC-03-04/ANSI-PIMA Joint Technical Commission meeting in Washington, D. C. in 2001-05 and Schuller agreed to raise the issue at the forthcoming AES conference on archiving in Budapest later this year. G. Cyrener noted the work of E. Zwannefedt on this subject, which includes published recommendations.

AES-X51 Procedures for the Storage of Optical Discs, Including Read Only, Write-once, and Re-writeable

This document remains in process. The WG recommends that the date for completion of this standard be changed to 2001-10.

AES-X54 Magnetic Tape Care and Handling

The WG received comment from two members regarding the PWD posted to the WG ftp site. These were from J. McKnight and Schuller. These comments were reviewed by the WG and appropriate changes accepted and noted in the text. The draft, and the comments of these two members will be reviewed again at the May meeting of the Joint Technical Commission. The chair invited all members of the WG to join that meeting for further discussion of the business before the WG and the commission.

AES-X55 Projection of the Life Expectancy of Magnetic Tape.

The chair noted that discussions at the Joint Technical Commission in 2000-09 in Los Angeles appeared to indicate that Australian representatives and others possess knowledge of methods and approaches to this topic that appear promising. In the light of this discussion, the WG recommends to the AESSC that the target date for this goal be changed to 2004- 09.

AES-X80 Liaison with ANSI/PIMA IT9-5.

The liaison arrangement has offered AESSC members the opportunity to work with colleagues to develop standards of significance. The WG recommends that the target date for this liaison arrangement be extended to 2005-10.

New projects

No project requests were received or introduced.

New Business

The chair noted that since the last meeting of the WG, it has been merged with the WG for optical media. This change led to a new title and a new scope for the combined WG which appears to be too narrow to encompass the work of the new WG. A revised title and scope statement was accepted unanimously by the WG and is recommended to SC-03. It reads as follows.

The scope of the SC-03-04 Working Group on Magnetic and Optical Media includes matters within the scope of SC-03 pertaining to magnetic and optical media, including the conditions and practices for storage, handling of media, the effects of those conditions on original recorded media and transfers derived therefrom, and where possible the estimation of life expectancy under specific conditions and practices.

The next meeting is scheduled to be held in conjunction with the AES 111th Convention in New York, New York, US.


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