scope:

The present document describes a compressed audio delivery system comprised of a metadata component and a compressed audio component. This system is referred to as DTS-UHD. The stream and metadata structures described here allow efficient delivery of immersive audio. Additionally, the bitstream format of a new audio compression engine is defined.

DTS-UHD supports delivery of Channel Based Audio (CBA), Object Based Audio (OBA) and High Order Ambisonic presentations up to the fourth order (HOA Soundfields). This support includes the metadata for signaling content, loudness and dynamics, and the necessary coefficients for rendering the final presentation.

The present document is organized into two main parts, with clauses 4 through 7 describing the DTS-UHD metadata and some system interfaces, which is independent of the coding scheme being used. Clauses 8 through 10 describe the Audio Compression Engine (ACE), which is designed for efficient delivery of compressed audio in broadcast and streaming environments.