MPEG-4 Structured Audio


MPEG-4 Structured Audio is an ISO/IEC standard for describing sound. It was published as subpart 5 of MPEG-4 Part 3 in 1999.
It allows the transmission of synthetic music and sound effects at very low bit rates, and the description of parametric sound post-production for mixing multiple streams and adding effects to audio scenes. It does not standardize a particular set of synthesis methods, but a method for describing synthesis methods.
The sound descriptions generate audio when compiled by a compliant decoder. MPEG-4 Structured Audio consists of the following major elements:
MPEG-4 Structured Audio was cited by CNN as one of the top-25 innovations to arise at the Media Laboratory.