Standards and Dolby documents provide additional information to assist you in designing your product.


  • ETSI TS 103 190-1 v1.3.1, Digital Audio Compression (AC-4) Standard, Part 1; Channel-Based Coding, available from This documentation describes the channel-based core codec of the AC-4 bitstream syntax.
  • ETSI TS 103 190-2 v1.2.1, Digital Audio Compression (AC-4) Standard, Part 2; Immersive and Personalized Audio, available from This documentation extends the AC-4 codec with a number of new use cases relevant for next-generation audio services.
  • ISO/IEC 14496-12:2015, Information Technology—Coding of Audio-Visual Objects, Part 12: ISO Base Media File Format, available from This documentation is Part 12 of the MPEG-4 specification and describes storage of content in a media file.
  • ISO/IEC 23009-1:2014, Information Technology—Dynamic Adaptive Streaming over HTTP (DASH)—Part 1: Media Presentation Description and Segment Formats, available from
  • ETSI TS 103 285 v1.2.1, Digital Video Broadcasting (DVB); MPEG-DASH Profile for Transport of ISO BMFF Based DVB Services over IP Based Networks, available from

Other documents

DASH-IF Interoperability Points for ATSC 3.0, available from