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Dolby Digital Plus and HTTP Live StreamingThis section specifies the required data formatting and signaling between the server (sender) and the clients (receivers) to use Dolby Digital Plus audio bitstreams in Apple HTTP Live Streaming audio/video (A/V) delivery applications.
HTTP Live Streaming playlist filesAn HTTP Live Streaming master playlist file provides information for your product about the available content for a media presentation.
Codec type indication for Dolby Digital Plus For media streams containing Dolby Digital Plus, the CODEC attribute of the #EXT-X-STREAM-INF parameter is recommended for codec type indication.

Introduction to the playback system development manualThis document supports the system designers and engineers who are building a playback product. It lists the requirements for decoding and playing back Dolby Digital Plus content in such a product and provides guidance to help in meeting the requirements.
Product overviewA typical product built and tested using the resources in this kit decodes and plays back Dolby Digital Plus content contained in an online container that supports adaptive streaming.
Requirements and recommendations A product that supports playback of Dolby Digital Plus bitstreams contained in an online delivery format must meet all defined requirements. The recommendations assist you to build a high-quality product.
Dolby Digital Plus streams in online delivery formatThe Dolby Digital Plus format provides a high level of flexibility and can support complex bitstream configurations. To minimize impact on decoding devices while ensuring that a wide range of applications can be supported, some constraints are applied to the permitted bitstream structure and to bitstream parameter settings.
Dolby Digital Plus and MPEG-DASHThese topics provide guidance to assist you in meeting the requirements for playing back Dolby Digital Plus streams using the MPEG-DASH standard in conjunction with the ISO base media file format.
Dolby Digital Plus and HTTP Live StreamingThis section specifies the required data formatting and signaling between the server (sender) and the clients (receivers) to use Dolby Digital Plus audio bitstreams in Apple HTTP Live Streaming audio/video (A/V) delivery applications.
- HTTP Live Streaming playlist filesAn HTTP Live Streaming master playlist file provides information for your product about the available content for a media presentation.
  - Codec type indication for Dolby Digital Plus For media streams containing Dolby Digital Plus, the CODEC attribute of the #EXT-X-STREAM-INF parameter is recommended for codec type indication.
  - Codec type indication for Dolby Atmos contentFor HTTP Live Streaming streams containing Dolby Digital Plus tracks with Dolby Atmos content, the CODEC attribute of the EXT-X-STREAM-INF parameter contains a value of ec-3 for indication of the audio codec. In addition, a CHANNELS attribute is included in the #EXT-X-MEDIA parameter.
  - HTTP Live Streaming playlist files with associated audio for receiver mixingA single Dolby Digital Plus bitstream may include one or more associated audio programs in addition to the main audio program (program extensions).
  - Examples of HTTP Live Streaming playlist files with Dolby Digital Plus This topic contains examples of HTTP Live Streaming playlist files with Dolby Digital Plus.
- Dolby Digital Plus bitstream identification in an MPEG-2 transport streamA Dolby Digital Plus bitstream in the transport stream can be identified by reading the information in the PES packet header.
- Packetization of Dolby Digital Plus for HTTP Live Streaming storageAs Dolby Digital Plus features a high level of flexibility and potentially complex bitstream configurations, a specific method is used for grouping Dolby Digital Plus frames together for storage within a PES packet payload.
- Buffering considerations for demultiplexing Dolby Digital Plus streams from HTTP Live Streaming compliant transport streamsThe minimum buffer size should be equal to the size of a PES packet load.
Dolby Digital Plus and ISO base media file formatThis section describes the process of analyzing an online delivered Dolby Digital Plus bitstream carried within an ISO base media file.
Glossary
Notices

Codec type indication for Dolby Digital Plus

For media streams containing Dolby Digital Plus, the CODEC attribute of the #EXT-X-STREAM-INF parameter is recommended for codec type indication.

If present, the CODEC attribute includes ec-3 for media presentations using Dolby Digital Plus, as shown in this example:

#EXT-X-STREAM-INF:BANDWIDTH=3464568,CODECS="avc1.640028,ec-3" example.m3u8

An object type indicator (OTI) value must not be appended to the ec-3 string.^[1]

[1] The object type indicator value is not defined for Dolby Digital Plus.