The ISO/MPEG standardization group recently finalized the MPEG-H 3D Audio standard for the universal carriage of encoded 3D-sound from channel-based, object-based, and HOA-based input. To achieve efficient low-bitrate coding of a high number of channels and objects, an advanced version of the well-known MPEG-D Spatial Audio Object Coding (SAOC) has been developed under the name SAOC 3D. The new SAOC 3D system supports direct reproduction to any output format from 22.2 and beyond down to 5.1 and stereo. This paper describes the SAOC-3D technology as it is part of the MPEG-H 3D Audio (phase one) International Standard and provides an overview of its features, capabilities, and performance.
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