MPEG-D

MPEG-D is a group of standards for audio coding formally known as ISO/IEC 23003 - MPEG audio technologies, published since 2007.

MPEG-D consists of four parts:
 * MPEG-D Part 1: MPEG Surround (a.k.a. Spatial Audio Coding )
 * MPEG-D Part 2: Spatial Audio Object Coding (SAOC)
 * MPEG-D Part 3: Unified speech and audio coding
 * MPEG-D Part 4: Dynamic Range Control
 * MPEG-D Part 5: Uncompressed audio in MPEG-4 File Format