Report of the meeting of the SC-02-01 Working Group on Digital Audio Measurement Techniques of the SC-02 Subcommittee on Digital Audio, held in New York, NY., US., 2007-10-06
The meeting was convened by chair S. Harris.
The agenda and the report of the previous meeting held on 2007-05-06 were approved as written.
Open Projects
AES-6id-R Personal Computer audio quality measurements
No action was requested or required.
AES-12id Jitter Performance Specifications
No action was requested or required.
AES17-R Measurement of digital audio equipment
There has been no activity since the previous meeting in Vienna in May 2007. Harris will discuss with I. Dennis - similarly, J. Novick with discuss with T. Kite - about the status of the revision work.
AES-X102 Liaison with IEC MT61606
Work is complete on the latest draft. M.Yonge will send a note to confirm the status of the IEC project after the IEC TC100 meeting in Colmar, France next week.
AES-X118 ITU-R study group 6 liaison
No activity to report
Liaisons
Nothing to report.
New business
Lip sync errors.
A. Mason discussed an update to his work on lip sync for HDTV.
There are two areas of interest. One is the human sensitivity to the time alignment between audio and video. The second is concerned with a technical method of measurement of audio to video time alignment (AV sync).
Many groups are looking at AV sync, including SMPTE, EBU, ITU, and HDMI. Should the AES be involved with defining a AV sync measurement method? The meeting felt that the answer was a clear "yes".
It was decided to propose a new project for AV sync. Mason will write a project scope and complete a new project proposal form.
analog measurements
Is there any scope for analog measurements - do they belong in SC-02-01? This will be discussed by AESSC as part of an expected general reorganisation of the standards working groups.
The next meeting of SC-02-01 will be scheduled in conjunction with the AES 124th Convention in Amsterdam, 2008-05.
