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Service providers, vendors, content owners and others are trying to wring out as much of the confusion as possible with an open standard. In December, the MPEG (the Moving Picture Experts Group) — which is run by the Organization for Standardization (the ISO) and the International Electrotechnical Commission — passed ISO/IEC 23009. The standard is called Dynamic Adaptive Streaming over HTTP or MPEG-DASH.
The next steps are for various industry groups — including CableLabs — to create the profiles that fit best for their industries and for owners of intellectual property to take the necessary steps to create a royalty-free environment.
Slow uptake, technical problems, and poor user reviews bring UltraViolet's future into question. If UltraViolet fails to gain traction, it may jeopardize DASH. On the other hand, looking back two years from now, we may find the only vestiges of UltraViolet left are the common file format and common encryption schemes that DASH has adopted.
Via Olivier NOEL
MPEG-DASH [Part 1: Media presentation description and segment formats] ISO document and XSD/manifest samples
The final version of MPEG-DASH ISO standard has been released. It goes with the Common Encryption format ( http://bit.ly/xADRVk ) for a complete standard streaming feature set.
Companion documents include : - XSD Schema that defines the Media Presentation Description for MPEG-DASH - Manifest samples for different profiles and use cases (on-demand multi-audio+timed text, live multi-audio, on-demand multi-audio MP2T, on-demand MVC 3D, on-demand SVC split representation, on-demand fast-forward sub-representations, on-demand DRM protected streams)
GRAB THE DOCUMENT HERE : http://bit.ly/zKljqq
Between the inevitable adoption of MPEG DASH and the growth in connected TVs, 2012 should be a banner year for streaming media...
Short Tutorial on MPEG-DASH
Marlin-DRM protected DASH POC : MMSys 2011 Ericsson research paper
Dynamic adaptive HTTP streaming (DASH) is a new concept for video streaming using consecutive downloads of short video segments. 3GPP has developed the basic DASH standard which is further extended by OIPF and MPEG. In all versions available to date, content protection is not properly enabled. Extensions are needed to enable important use cases like pay-per-view, license change in an ongoing video channel, and pay-per-maximum-quality.
In this publication, Frank Hartung, Sinan Kesici and Daniel Catrein have examined which extensions are needed, in order to use DASH for DRM protected content. This comprises required changes in the DASH standard, namely MPD metadata extensions, as well as changes in the used transport file formats, namely the inclusion of a ISO file format box carrying a segment key, and finally a suitable key and license structure applied to the underlying DASH concept. All those changes have been proposed and explained in the paper. With these changes and additions, which do not change the core idea of DASH, even more complex use cases like pay-per-view and pay-per-maximum-quality are possible. As a proof-of-concept, the authors have implemented the proposed changes and integrated them with a real DRM key and license management system. For the proof-of-concept, they have used Marlin DRM, but any other similar DRM would be equally usable.
READ THE PAPER HERE : http://www.hartung.fh-aachen.de/publications/ACM_MMSys2011_p277.pdf
Compliance Procedures for Dynamic Adaptive Streaming over HTTP (DASH)
Master’s Degree Project by Kashaf Mazhar (Stockholm, Sweden).
The main objective of the thesis is to formulate compliance procedure of DASH. The need for conformance procedures focused in the thesis can be summarized as: - It forms the outline for the interaction between the client and server for the exchange of information before the streaming begins. This interaction needs to follow the rules and regulations laid out by the DASH standard itself. So the main aim is to formulate the rules and then implement them so that common grounds for DASH interaction can be laid out. Services that conform to theses grounds can be regarded as DASH. - Then the file format conformance is investigated to correlate the information exchanged and the media content itself that is used by the streaming service. Providing cross reference mechanisms confirms that the content that is available on the server for streaming is following DASH specification. This is important to check because the features and efficiency that DASH proclaims is possible only via the existence of the attributes that are being checked by conformance procedures. - As the standardization process is underway it is important to clarify the implementation details for the process as well. In light of this a link needs to be created between the theoretical concepts mentioned and the practical implementation required for that. The conformance procedures will serve this purpose as the implementation part of it will test the concepts of DASH in practice and will provide grounds to make amendments in the specification where required.
READ THE THESIS HERE : https://eeweb01.ee.kth.se/upload/publications/reports/2011/XR-EE-LCN_2011_011.pdf
Usages of DASH for Rich Media Services
In this research paper, Cyril Concolato, Jean Le Feuvre and Romain Bouqueau have investigated how Rich Media languages can be used with adaptive streaming over HTTP technologies, especially MPEG DASH. They have shown the need to provide standard ways to identify parts of a DASH session for track selection. They have also presented how Rich Media services can be carried in a DASH session along with audio and video data to ensure tight synchronization between the media data and the interactive service.
Finally, they proposed some light modifications to DASH and ISO Base Media File to allow building a smart, bandwidth-friendly data carousel of interactive services and meta-data in a DASH session.
READ THE PAPER HERE : http://biblio.telecom-paristech.fr/cgi-bin/download.cgi?id=11064
A proposed standard to stream video online smoothly, regardless of network conditions, has been pushed forward with some rather unexpected patent-holder help.MPEG-DASH was approved in a vote by ISO national member bodies as a way to stream media over HTTP. Publication of the standard is expected "shortly".
MPEG-DASH could supersede a raft of proprietary and royalty-protected technologies, developed by tech companies to stream media to mobile devices in particular - which are at the mercy of varying network speeds and connectivity conditions. For fans of free and open source software, it'll raise the hope that HTML5 video can sidestep royalty-encumbered players currently available from the likes of Microsoft, Adobe or Apple.
"The biggest advantage to us of a standard like MPEG DASH is that everything can be encoded one way and encapsulated one way, and stored on our CDN servers just once. That's a benefit both in terms of saving our CDN costs from a storage perspective and a benefit because you have greater cache efficiency," said Mark Watson, senior engineer for Netflix.
MPEG DASH - Enabling Formats for Video Streaming over the Open Internet (EBU webinar PDF)
... MPEG news from its 98th meeting in Geneva, Switzerland with less than 140 characters and a lot of acronyms. The official press release is, as usual, here. As you can see from the press release, MPEG produced significant results, namely: - MPEG Dynamic Adaptive Streaming over HTTP (DASH) ratified - 3D Video Coding: Evaluation of responses to Call for Proposals - MPEG royalty free video coding: Internet Video Coding (IVC) + Web Video Coding (WebVC) - High Efficiency Coding and Media Delivery in Heterogeneous Environments: MPEG-H comprising MMT, HEVC, 3DAC - Compact Descriptors for Visual Search (CDVS): Evaluation of responses to the Call for Proposals - Call for requirements: Multimedia Preservation Description Information (MPDI) - MPEG Augmented Reality (AR) As you can see, a long list of achievements within a single meeting but let's dig inside. For each topic I've also tried to provide some research issues which I think are worth to investigate both inside and outside MPEG.
ISO/IEC 23009-1, known as MPEG-DASH, has been ratified unanimously by positive votes from 24 national bodies in November 2011. Publication by ISO as an International Standard will take place shortly. MPEG-DASH is the first International Standard for dynamic adaptive streaming of multimedia content over HTTP, based on work previously published by 3GPP. It provides a rich set of features to support on-demand, live streaming and time-shift services. It also supports streaming of multiplexed or independent streams over the existing Internet infrastructure with efficient use of CDNs (Content Delivery Networks). Since it requires only HTTP servers, existing server solutions can be used for large-scale deployment scenarios such as the delivery of TV content over Internet and mobile networks. Several standardization organizations and industry consortia are building on MPEG-DASH in their own specifications.
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Input media formats: - Smooth (VoD & Live). An adaptive HTTP format specified by Microsoft. Used by Microsoft in Silverlight, but is an open format that third party clients also support. - Apple HLS (VoD & Live). An adaptive HTTP format specified by Apple. Used by Apple in iPhone/iPad, but is – like Smooth – an open format. - MPEG DASH (VoD). A new adaptive format specified by ISO. Wide and promising industry backing. We support both MPEG-2 TS and MP4-based (ISOBFF) profiles.
Input DRM formats:
- Microsoft PlayReady DRM
In a decade or so down the line, experts looking back likely will say that 2012 was the year cable operators and the rest of the telecommunications industry pivoted from basic “get it out there” multiscreen platforms to those that work with a far higher level of precision and efficiency.
That’s the plan, at least. What happens remains to be seen. What is clear is that the industry is poised to take several important steps beyond the “one off” catch-as-catch-can approach that has dominated to date. “The year 2011 saw most — if not all — the major service providers world-wide investigating adaptive streaming, ranging from lab investigations to highly publicized deployments,” wrote Yuval Fisher, chief technology officer of RGB Networks in response to emailed questions. “The market has matured quickly, with operators’ expectations quickly rising from the initial ‘help me just see how this works’ to ‘I need high video quality, high-availability equipment.’”
MPEG systems technologies Part 7 Final Draft : Common Encryption (CENC) in ISO base media file format files
If you are interested into knowing details of the upcoming Common Encryption (CENC) format that is supposed to be finalized in februray (cf http://bit.ly/rxuijU ), you can take a look at its Final Draft version...
It seems that there is a ballot pending about AES CBC beside AES CTR : http://bit.ly/znGz6M
READ THE SPECIFICATION HERE : http://bit.ly/wzqsOO
1st Quarter 2012 Video Breakthroughs Events List
Interesting list of DASH special features among which : - Switching and selectable streams - Fragmented manifest - Segments with variable durations - Multiple base URLs - Clock-drift control for live sessions - Quality metrics for reporting the session experience
A good overview of the major features implemented in 2011 inside USP repackaging software : - PlayReady encryption key exchange with BuyDRM's KeyOS Smooth DRM Service - Verimatrix iOS key exchange - support for MPEG DASH draft specification - Proxy support (NFS, S3, Windows Azure)
... and what's coming in 2012 : - Selective scrambling - Flash access DRM - Full MPEG-DASH support - support for UltraViolet's Common File Format, using Common Encryption
A Test Bed for DASH featuring Session Mobility
In this research paper, Christopher Müller and Christian Timmerer have described a test-bed for DASH featuring session mobility. It is based on international open standards and fully integrated into the well-known VLC. In particular, it facilitates MPEG-21 Digital Item in order to leverage existing media repositories such as UPnP and provides a testing framework for actual dynamic adaptive streaming algorithms including the possibility for transferring a running session from one device to another.
READ PAPER HERE : http://www-itec.uni-klu.ac.at/bib/files/mueller_A_Test_Bed_for_DASH_featuring_Session_Mobility.pdf
Presentation on use of DASH with MPEG-2 TS for Adaptive Multiplatform Delivery
If you produce streaming video in the worship market and have your ear to the ground, you may be experiencing sensory overload right now. HTML5 is being promoted as a panacea for all plug-in-related woes; Adobe threw the mobile market into turmoil by ceasing development of the Flash Player, and there’s a new standard called DASH that supposedly will create a unified approach for adaptive streaming to all connected devices. Seems like getting that sermon out over the Internet has gotten a lot more complicated. Well, maybe not. In this article I’ll describe what’s actually happening with HTML5, Flash, and DASH, and make some suggestions as to how to incorporate these changes into your video-related technology plans.
An MPEG meeting in February will further shape the spec as it moves to general adoption. The Motion Pictures Experts Group (MPEG) announced last week that the DASH specification has been ratified as a standards-based way to move forward with dynamically adaptive streaming over the HTTP protocol. The DASH specification was approved by 24 national bodies from across North America, Europe, and parts of Asia. MPEG-DASH, now know as ISO/IEC 23009-1, was frozen technically in August 2011, and ratified by the national bodies prior to MPEG 98 (the 98th meeting of MPEG) held in Geneva, Switzerland, which wrapped up on December 2.
Microsoft launches Silverlight 5, keeping a promise for GPU decoding and equality for browser-based applications. Given the added functionality and lengthy formalized support cycle that Microsoft announced at the time of Silverlight 5's launch - the company says it will support the tool until late 2021 - the same pundits might want to take a second look. First, let's look at the functionality. Microsoft announced two key features of Silverlight 5: graphics processing unit (GPU) acceleration for H.264 decoding and the ability for Silverlight to make a direct call to the kernel of the host operating system.
IP streaming technology has advanced significantly over the past decade, as network performance has increased and as new protocols have been used for video delivery. Unfortunately, these improvements have been driven primarily by a few dominant vendors (Apple, Microsoft and Adobe), and they don't interoperate with each other. Dynamic Adaptive Streaming over HTTP (DASH) provides a common, standards-based methodology for delivering video and audio content over a wide variety of IP networks including the Internet. Work on specifying DASH is nearing completion as a standard within the International Organization for Standardization (ISO) and International Electrotechnical Commission (IEC), the same groups that published the well-known MPEG standards. Final versions of products and systems based on DASH should begin appearing on the market in the near future.
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