Completed DASH-IF Interoperability Documents
The documents below are stable and have undergone a community review. However, the DASH-IF welcomes feedback on these published documents, e.g, request for clarifications or bugs. For this purpose, please use the Github bug tracker cited along with the documents.
DASH-IF Interoperability Points and Extensions
The scope of the DASH-IF InterOperability Points (IOPs) defined in this document is to provide support for high-quality video distribution for over the top services using H.264/AVC and H.265/HEVC. Both live and on-demand services are supported. The specified features enable relevant use cases including on-demand, live services, ad insertion, trick modes, seek preview, content protection and subtitling. Exten-sions for multi-channel audio and next generation audio with different codecs as well as extensions to video different codecs and Ultra High Definition are defined.
Any identified bugs or missing features may be submitted through the DASH-IF issue tracker at https://gitreports.com/issue/Dash-Industry-Forum/DASH-IF-IOP.
Note that version 4.3 is published as an add on to v4.2, but with the next version it is expected that a either a multipart version or a restructured version will be generated, with a major editorial updates. The new version is expected to be available by spring of 2019.
- Guidelines for Implementation: DASH-IF Interoperability Points V4.3: On-Demand and Mixed Services, HDR Dynamic Metadata and other Improvements | (Bugtracker) | (diff to v4.2)
- Guidelines for Implementation: DASH-IF Interoperability Points V4.2: Multiple Clarifications and Bug fixes | (Bugtracker) | (diff to v4.1) | (Online version)
- Guidelines for Implementation: DASH-IF Interoperability Points V4.1: Robust Live, Seek Preview, Content Annotation, New Media Codecs and other extensions
- Guidelines for Implementation: DASH-IF Interoperability Points V4.0: UHD Video and other extensions | (Bugtracker) | (diff to v3.3)
- Guidelines for Implementation: DASH-IF Interoperability Points V3.3: Alignment with MPEG-DASH, Guidelines on keys and other corrections| (Bugtracker) | (diff to v3.2)
- Guidelines for Implementation: DASH-IF Interoperability Points V3.2: Addition of Adaptation Set Switching, HTTPS Guidelines, Key Rotation and MPEG-H Audio| (Bugtracker) | (diff to v3.1)
- Guidelines for Implementation: DASH-IF Interoperability Points V3.1: Addition of CEA608/708, IMSC1, AC-4 | (Bugtracker)
- Guidelines for Implementation: DASH-AVC/264 Interoperability Points V3.0: DRM updates, Improved Live, Ad Insertion, Events, HEVC support, Trick Modes, CEA608/708 | (Bugtracker)
- Guidelines for Implementation: DASH-AVC/264 Interoperability Points V2.0: HD and Multi-Channel Audio Extensions | (Bugtracker)
- Guidelines for Implementation: DASH-AVC/264 Interoperability Points V1.0 | (Bugtracker)
DASH-IF Content Protection Information Exchange Format
The scope of this document is to define a Content Protection Information Exchange Format (CPIX). The CPIX document contains keys and DRM information used for encrypting and protecting content, and can be used for exchanging this information among entities needing it in many possibly different workflows for preparing, for example DASH content or HLS content. The CPIX document itself can be encrypted, signed and authenticated so that its receivers can be sure that its confidentiality, source and integrity are also protected.
DASH-IF Implementation Guidelines v2.1: Content Protection Information Exchange Format (CPIX) | (PDF) | (XSD) | (Bugtracker) | (Test vectors)
The document provides the following extensions to v2.0:
- Update on HLS signalization: support for separate EXT-X-KEY and EXT-X-SESSION-KEY signaling
- Add HDS signalization support
- Clarifications on the usage of @label attribute
- Typos and drawings update for finalizing the migration to HTML
- DASH-IF Implementation Guidelines v2.0: Content Protection Information Exchange Format (CPIX)| (XML)| (Bugtracker)
- DASH-IF Implementation Guidelines v1.0: Content Protection Information Exchange Format (CPIX)| (XML)| (Bugtracker)
Guidelines for Implementation: DASH-IF Interoperability Point for ATSC 3.0
The scope of this document is to provide a DASH interoperability point that is based on DASH-IF-IOPs and provides extensions to address use cases and requirements of ATSC 3.0.
Comments and bugs may be submitted through the public github repository.
Version 1.1: Guidelines for Implementation: DASH-IF Interoperability Point for ATSC 3.0 (pdf | diff to v1.0)
This updated version adds the following aspects:
- Update of references to refer to the latest correct versions
- Clarification on track selection in clause 3.3 and addition of a new clause 2.7.5
- Addition of a placeholder for a non-real time profile in clause 1.3
- Updates to the ROUTE protocol constraints when used with $TIME$ in clause 2.2
- Clarification on the usage of @r=-1 with the Segment timeline in clause 3.1.
- Reference to DASH-IF IOP for joining, initial buffering and playout in clause 4.
- Addition of High Dynamic Range (HDR) video in clause 3.3.
- Clarification on ATSC events and DASH events in clause 6.3
- Update to xlink behavior in clause 5.1
- Miscellaneous editorial updates
Guidelines for Implementation: DASH-IF SAND Interoperability
The scope of this document is to address interoperability aspects and deployment guidelines for Server and Network Assisted DASH (SAND). More specifically, the following aspects of SAND are covered: • Modes defining subsets of SAND messages and mandatory SAND protocols to use for specific deployment environments • Capability exchange procedures for DASH clients and DANEs • Security guidelines for SAND messages delivery • Procedures on DANE discovery for SAND
Comments and bugs may be submitted through the public github repository
Guidelines for Implementation: DASH-IF SAND Interoperability Version 1.0 (pdf)
DASH-IF Test cases and Vectors
DASH-IF Interoperability Documents for Community Review
Community Review documents are published on the DASH-IF website in order to get feedback from the industry on tools and features that are documented for improved interoperability. For each of the documents, comments may be submitted on the technologies itself, on specific features, etc. These documents are only published temporarily for community review and will be replaced by a full version after the commenting period has closed and the comments have been addressed.
Leap second handling clarifications
- The change request against IOP v4.1 for Community Review is accessible here
- Community review is open until April 15th, 2018. Addition to IOP is expected by Q2/2018.
- Comments may be submitted through the public bugtracker
- This addition adds the following main features: Clarifies how to handle leap seconds and how to avoid common pitfalls
DASH-IF Implementation Guidelines: Token-based Access Control for DASH (TAC) v1.0
- The document for 2nd Community Review is accessible here
- Community review is open until March 31st, 2018. Publication is expected by Q4/2018.
- Comments may be submitted through the public github repository
- The scope of this document is to define a token-based access control mechanism and enabling the signaling of authentication and authorization (AA) protocols for DASH-based video streaming. An access token is a proof that a DASH client or user of the clients have been successfully authenticated and authorized, respectively, in some pre-determined AA Systems to access a particular DASH resource, e.g. DASH segments or MPDs. This document remains agnostic on what AA Systems and protocols are actually used for DASH clients to obtain AA Tokens but it does define the access token format for accessing DASH resources, hence ensuring interoperability between content providers and content delivery networks.
DASH-IF Conformance Software
- DASH-AVC/264 Online Conformance Tool
- Please use the following bugtracker to submit issues with the conformance software: https://gitreports.com/issue/Dash-Industry-Forum/Conformance-Software
- For detailed description see here: DASH-IF-Conformance-Software-v1.0.pdf
ISO Publicly Available Specification
White Papers and Background
- DASH-IF position Paper: DASH-IF Position Paper: Server and Network Assisted DASH (SAND) (500k PDF)
- DASH-IF position Paper: Proposed QoE Media Metrics standardization for segmented media playback (1M PDF)
- DASH-AVC/264: A Baseline Implementation for MPEG-DASH Press Conference Material (2M PDF)
- DASH-AVC/264: A Baseline Implementation for MPEG-DASH Press Conference (Streaming recording)
- Survey of European Broadcasters on MPEG-DASH
- Reinventing multimedia delivery with MPEG-DASH, SPIE Applications of Digital Image Processing XXXIV, Sept 2011.
- T. Stockhammer: “Dynamic Adaptive Streaming over HTTP-Design Priciples and Standards” In: MMSys ’11: Proceedings of the second annual ACM conference on Multimedia systems New York, NY, USA: ACM Press , Feb 2011,S. 133-144.