Clean Audio for TV broadcast: An Object-Based Approach for Hearing-Impaired Viewers - April 2015
Audibility of a CD-Standard A/DA/A Loop Inserted into High-Resolution Audio Playback - September 2007
Sound Board: Food for Thought, Aesthetics in Orchestra Recording - April 2015
Evaluation of Live Meter Ballistics for Loudness Control
The broadcast community is transitioning from practices that revolved around audio peak normalization to one where the focus is on loudness consistency. Central to this effort is the loudness measurement algorithm described in ITU-R BS.1770. To assist in the mixing of audio that targets specific long-term loudness levels, a need has been identified for some form of loudness-based live audio metering. The EBU has proposed meter specifications to indicate “momentary” and “short-term” loudness whose ballistics are defined, respectively, by a 400 ms and a 3000 ms integration window. In parallel with the EBU efforts, the CBC/Radio-Canada, in collaboration with the CRC, has been studying since 2008 various loudness meter ballistics that would be suitable in a production environment. This paper reports on a series of tests carried out by the CBC/Radio-Canada where various momentary meter ballistics were evaluated. It was found that an IIR-based meter ballistic with a 400 ms time constant was preferred.
Click to purchase paper or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!
This paper costs $20 for non-members, $5 for AES members and is free for E-Library subscribers.