A revised edition of AES41-2009: AES standard for digital audio - Recoding data set for audio bit-rate reduction has ben published.
This document describes a format for the data to be transmitted to identify a number of popular audio bit-rate reduction techniques. Provision is also made for the transmission of additional ancillary information. This document also describes a mechanism whereby the data derived from the coded signal can be transported with the decoded signal so that the data may be recovered and used to aid a subsequent re-encoding process.
This 2009 revision extends AES41 to include data formats for carrying this loudness and down-mix metadata with the uncompressed PCM using the same transport mechanism as before. The metadata can therefore be carried in the audio to which it relates.
Posted: Tuesday, July 6, 2010
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