About this documentation

This documentation is written for a system designer to develop a product for OTT services that can properly multiplex Dolby AC-4 bitstreams into an MPEG-DASH compliant ISO base media file format. The scope of this documentation is to provide requirements and guidance for audio distribution for online delivery (OTT services) using Dolby AC-4.

library_booksNote: This documentation covers only delivering Dolby AC-4 content within the MPEG-DASH compliant ISO base media file format. For a full description of DASH, see Information Technology—Dynamic Adaptive Streaming over HTTP (DASH)—Part 1: Media Presentation Description and Segment Formats.

This documentation provides information regarding:

  • Signaling of Dolby AC-4 audio streams within the MPEG-DASH MPD file
  • Storage of Dolby AC-4 bitstreams within ISO base media file format files conforming to MPEG-DASH

In addition, the following information is covered:

  • The data required to identify a Dolby AC-4 bitstream within an MPEG-DASH compliant ISO base media file format file and an MPD manifest file
  • The steps required to properly packetize a Dolby AC-4 bitstream for multiplexing and storage in an MPEG-DASH compliant ISO base media file format file
  • The steps required to demultiplex a Dolby AC-4 bitstream from an MPEG-DASH compliant ISO base media file format file