What is "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 three 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