Audio Engineering Society 141st Convention
Sept 29 – Oct 2, 2016
Alexey Lukin, iZotope's Principal DSP Engineer, has presented a paper: A. Lukin, R. McClellan, A. Wishnick “A two-pass algorithm for automatic loudness correction”.
Loudness standards for broadcast audio, such as BS.1770, establish target values for the integrated loudness, true peak level, and short-term loudness of a record. Compliance with these three targets can be challenging when the dynamic range of a record is high, so software for automatic loudness correction is important for speeding up the workflow of post-production engineers. This work reviews existing software implementations of automatic loudness correction and proposes a new algorithm that provides efficient simultaneous correction of all three targets.
To purchase copies of the paper itself, please see the AES website.
You can download the PowerPoint presentation here: LukinMcclellanWishnick.pptx (1 MB)
The test set of 6 audio samples used for loudness measurements can be downloaded here: samples.zip (130 MB)
True Peak FiltersHere we present frequency responses of true peak detection filters described in the paper.