Author Archives: Christian Timmerer

About Christian Timmerer

Christian Timmerer is a researcher, entrepreneur, and teacher on immersive multimedia communication, streaming, adaptation, and Quality of Experience. He is an Assistant Professor at Alpen-Adria-Universität Klagenfurt, Austria. Follow him on Twitter at http://twitter.com/timse7 and subscribe to his blog at http://blog.timmerer.com.

MPEG Column: 105th MPEG Meeting

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— original post by Multimedia Communication blog, Christian Timmerer, AAU

 

Opening plenary, 105th MPEG meeting, Vienna, Klagenfurt

At the 105th MPEG meeting in Vienna, Austria, a lot of interesting things happened. First, this was not only the 105th MPEG meeting but also the 48th VCEG meeting, 14th JCT-VC meeting, 5th JCT-3V meeting, and 26th SC29 meeting bringing together more than 400 experts from more than 20 countries to discuss technical issues in the domain of coding of audio, [picture (SC29 only),] multimedia and hypermedia information. Second, it was the 3rd meeting hosted in Austria after the 62nd in July 2002 and 77th in July 2006. In 2002, “the new video coding standard being developed jointly with the ITU-T VCEG organization was promoted to Final Committee Draft (FCD)” and in 2006 “MPEG Surround completed its technical work and has been submitted for final FDIS balloting” as well as “MPEG has issued a Final Call for Proposals on MPEG-7 Query Format (MP7QF)”.

The official press release of the 105th meeting can be found here but I’d like to highlight a couple of interesting topics including research aspects covered or enabled by them. Although research efforts may lead to the standardization activities but also enables research as you may see below.

MPEG selects technology for the upcoming MPEG-H 3D audio standard

Based on the responses submitted to the Call for Proposals (CfP) on MPEG-H 3D audio, MPEG selected technology supporting content based on multiple formats, i.e., channels and objects (CO) and higher order ambisonics (HOA). All submissions have been evaluated by comprehensive and standardized subjective listening tests followed by statistical analysis of the results. Interestingly, when taking the highest bitrate of 1.2 Mb/s with a 22.2 channel configuration, both of the selected technologies have achieved excellent quality and are very close to true transparency. That is, listeners cannot differentiate between the encoded and uncompressed bitstream. A first version of the MPEG-H 3D audio standard with higher bitrates of around 1.2 Mb/s to 256 kb/s should be available by March 2014 (Committee Draft – CD), July 2014 (Draft International Standard – DIS), and January 2015 (Final Draft International Standards – FDIS), respectively.

Research topics: Although the technologies have been selected, it’s still a long way until the standard gets ratified by MPEG and published by ISO/IEC. Thus, there’s a lot of space for researching efficient encoding tools including the subjective quality evaluations thereof. Additionally, it may impact the way 3D Audio bitstreams are transferred from one entity to the another including file-based, streaming, on demand, and live services. Finally, within the application domain it may enable new use cases which are interesting to explore from a research point of view.

Augmented Reality Application Format reaches FDIS status

The MPEG Augmented Reality Application Format (ARAF, ISO/IEC 23000-13) enables the augmentation of the real world with synthetic media objects by combining multiple, existing standards within a single specific application format addressing certain industry needs. In particular, it combines standards providing representation formats for scene description (i.e., subset of BIFS), sensor/actuator descriptors (MPEG-V), and media formats such as audio/video coding formats. There are multiple target applications which may benefit from the MPEG ARAF standard, e.g., geolocation-based services, image-based object detection and tracking, mixed and augmented reality games and real-virtual interactive scenarios.

Research topics: Please note that MPEG ARAF only specifies the format to enable interoperability in order to support use cases enabled by this format. Hence, there are many research topics which could be associated to the application domains identified above.

What’s new in Dynamic Adaptive Streaming over HTTP?

The DASH outcome of the 105th MPEG meeting comes with a couple of highlights. First, a public workshop was held on session management and control (#DASHsmc) which will be used to derive additional requirements for DASH. All position papers and presentations are publicly available here. Second, the first amendment (Amd.1) to part 1 of MPEG-DASH (ISO/IEC 23009-1:2012) has reached the final stage of standardization and together with the first corrigendum (Cor.1) and the existing part 1, the FDIS of the second edition of ISO/IEC 23009-1:201x has been approved. This includes support for event messages (e.g., to be used for live streaming and dynamic ad insertion) and a media presentation anchor which enables session mobility among others. Third and finally, the FDIS of conformance and reference software (ISO/IEC 23009-2) has been approved providing means for media presentation conformance, test vectors, a DASH access engine reference software, and various sample software tools.

Research topics: The MPEG-DASH conformance and reference software provides the ideal playground for researchers as it can be used both to generate and to consume bitstreams compliant to the standard. This playground could be used together with other open source tools from the DASH-IF, GPAC, and DASH@ITEC. Additionally, see also Open Source Column: Dynamic Adaptive Streaming over HTTP Toolset.

HEVC support in MPEG-2 Transport Stream and ISO Base Media File Format

After the completion of High Efficiency Video Coding (HEVC) – ITU-T H.265 | MPEG HEVC at the 103rd MPEG meeting in Geneva, HEVC bitstreams can be now delivered using the MPEG-2 Transport Stream (M2TS) and files based on the ISO Base Media File Format (ISOBMFF). For the latter, the scope of the Advanced Video Coding (AVC) file format has been extended to support also HEVC and this part of MPEG-4 has been renamed to Network Abstract Layer (NAL) file format. This file format now covers AVC and its family (Scalable Video Coding – SVC and Multiview Video Coding – MVC) but also HEVC.

Research topics: Research in the area of delivering audio-visual material is manifold and very well reflected in conference/workshops like ACM MMSys and Packet Video and associated journals and magazines. For these two particular standards, it would be interesting to see the efficiency of the carriage of HEVC with respect to the overhead.

Publicly available MPEG output documents

The following documents shall be come available at http://mpeg.chiariglione.org/ (availability in brackets – YY/MM/DD). If you have difficulties to access one of these documents, please feel free to contact me.

  • Requirements for HEVC image sequences (13/08/02)
  • Requirements for still image coding using HEVC (13/08/02)
  • Text of ISO/IEC 14496-16/PDAM4 Pattern based 3D mesh compression (13/08/02)
  • WD of ISO/IEC 14496-22 3rd edition (13/08/02)
  • Study text of DTR of ISO/IEC 23000-14, Augmented reality reference model (13/08/02)
  • Draft Test conditions for HEVC still picture coding performance evaluation (13/08/02)
  • List of stereo and 3D sequences considered (13/08/02)
  • Timeline and Requirements for MPEG-H Audio (13/08/02)
  • Working Draft 1 of Video Coding for browsers (13/08/31)
  • Test Model 1 of Video Coding for browsers (13/08/31)
  • Draft Requirements for Full Gamut Content Distribution (13/08/02)
  • Internet Video Coding Test Model (ITM) v 6.0 (13/08/23)
  • WD 2.0 MAR Reference Model (13/08/13)
  • Call for Proposals on MPEG User Description (MPEG-UD) (13/08/02)
  • Use Cases for MPEG User Description (13/08/02)
  • Requirements on MPEG User Description (13/08/02)
  • Text of white paper on MPEG Query Format (13/07/02)
  • Text of white paper on MPEG-7 AudioVisual Description Profile (AVDP) (13/07/02)

Open Source Column: Dynamic Adaptive Streaming over HTTP Toolset

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Introduction

Multimedia content is nowadays omnipresent thanks to technological advancements in the last decades. A major driver of today’s networks are content providers like Netflix and YouTube, which do not deploy their own streaming architecture but provide their service over-the-top (OTT). Interestingly, this streaming approach performs well and adopts the Hypertext Transfer Protocol (HTTP), which has been initially designed for best-effort file transfer and not for real-time multimedia streaming. The assumption of former video streaming research that streaming on top of HTTP/TCP will not work smoothly due to its retransmission delay and throughput variations, has apparently be overcome as supported by [1]. Streaming on top of HTTP, which is currently mainly deployed in the form of progressive download, has several other advantages. The infrastructure deployed for traditional HTTP-based services (e.g., Web sites) can be exploited also for real-time multimedia streaming. Typical problems of real-time multimedia streaming like NAT or firewall traversal do not apply for HTTP streaming. Nevertheless, there are certain disadvantages, such as fluctuating bandwidth conditions, that can not be handled with the progressive download approach, which is a major drawback especially for mobile networks where the bandwidth variations are tremendous. One of the first solutions to overcome the problem of varying bandwidth conditions has been specified within 3GPP as Adaptive HTTP Streaming (AHS) [2]. The basic idea is to encode the media file/stream into different versions (e.g., bitrate, resolution) and chop each version into segments of the same length (e.g., two seconds). The segments are provided on an ordinary Web server and can be downloaded through HTTP GET requests. The adaptation to the bitrate or resolution is done on the client-side for each segment, e.g., the client can switch to a higher bitrate – if bandwidth permits – on a per segment basis. This has several advantages because the client knows best its capabilities, received throughput, and the context of the user. In order to describe the temporal and structural relationships between segments, AHS introduced the so-called Media Presentation Description (MPD). The MPD is a XML document that associates an uniform resource locators (URL) to the different qualities of the media content and the individual segments of each quality. This structure provides the binding of the segments to the bitrate (resolution, etc.) among others (e.g., start time, duration of segments). As a consequence each client will first request the MPD that contains the temporal and structural information for the media content and based on that information it will request the individual segments that fit best for its requirements. Additionally, the industry has deployed several proprietary solutions, e.g., Microsoft Smooth Streaming [3], Apple HTTP Live Streaming [4] and Adobe Dynamic HTTP Streaming [5], which more or less adopt the same approach.

Figure 1: Concept of Dynamic Adaptive Streaming over HTTP.

Recently, ISO/IEC MPEG has ratified Dynamic Adaptive Streaming over HTTP (DASH) [6] an international standard that should enable interoperability among proprietary solutions. The concept of DASH is depicted in Figure 1. The Institute of Information Technology (ITEC) and, in particular, the Multimedia Communication Research Group of the Alpen-Adria-Universität Klagenfurt has participated and contributed from the beginning to this standard. During the standardization process a lot of research tools have been developed for evaluation purposes and scientific contributions including several publications. These tools are provided as open source for the community and are available at [7].

Open Source Tools Suite

Our open source tool suite consists of several components. On the client-side we provide libdash [8] and the DASH plugin for the VLC media player (also available on Android). Additionally, our suite also includes a JavaScript-based client that utilizes the HTML5 media source extensions of the Google Chrome browser to enable DASH playback. Furthermore, we provide several server-side tools such as our DASH dataset, consisting of different movie sequences available in different segment lengths as well as bitrates and resolutions. Additionally, we provide a distributed dataset mirrored at different locations across Europe. Our datasets have been encoded using our DASHEncoder, which is a wrapper tool for x264 and MP4Box. Finally, a DASH online MPD validation service and a DASH implementation over CCN completes our open source tool suite.

libdash

Figure 2: Client-Server DASH Architecture with libdash.

The general architecture of DASH is depicted in Figure 2, where orange represents standardized parts. libdash comprises the MPD parsing and HTTP part. The library provides interfaces for the DASH Streaming Control and the Media Player to access MPDs and downloadable media segments. The download order of such media segments will not be handled by the library. This is left to the DASH Streaming Control, which is an own component in this architecture but it could also be included in the Media Player. In a typical deployment, a DASH server provides segments in several bitrates and resolutions. The client initially receives the MPD through libdash which provides a convenient object-oriented interface to that MPD. Based on that information the client can download individual media segments through libdash at any point in time. Varying bandwidth conditions can be handled by switching to the corresponding quality level at segment boundaries in order to provide a smooth streaming experience. This adaptation is not part of libdash and the DASH standard and will be left to the application which is using libdash.

DASH-JS

Figure 3: Screenshot of DASH-JS.

DASH-JS seamlessly integrates DASH into the Web using the HTML5 video element. A screenshot is shown in Figure 3. It is based on JavaScript and uses the Media Source API of Google’s Chrome browser to present a flexible and potentially browser independent DASH player. DASH-JS is currently using WebM-based media segments and segments based on the ISO Base Media File Format.

DASHEncoder

DASHEncoder is a content generation tool – on top of the open source encoding tool x264 and GPAC’s MP4Box – for DASH video-on-demand content. Using DASHEncoder, the user does not need to encode and multiplex separately each quality level of the final DASH content. Figure 4 depicts the workflow of the DASHEncoder. It generates the desired representations (quality/bitrate levels), fragmented MP4 files, and MPD file based on a given configuration file or by command line parameters.

Figure 4: High-level structure of DASHEncoder.

The set of configuration parameters comprises a wide range of possibilities. For example, DASHEncoder supports different segment sizes, bitrates, resolutions, encoding settings, URLs, etc. The modular implementation of DASHEncoder enables the batch processing of multiple encodings which are finally reassembled within a predefined directory structure represented by single MPD. DASHEncoder is available open source on our Web site as well as on Github, with the aim that other developers will join this project. The content generated with DASHEncoder is compatible with our playback tools.

Datasets

Figure 5: DASH Dataset.

Our DASH dataset comprises multiple full movie length sequences from different genres – animation, sport and movie (c.f. Figure 5) – and is located at our Web site. The DASH dataset is encoded and multiplexed using different segment sizes inspired by commercial products ranging from 2 seconds (i.e., Microsoft Smooth Streaming) to 10 seconds per fragment (i.e., Apple HTTP Streaming) and beyond. In particular, each sequence of the dataset is provided with segments sizes of 1, 2, 4, 6, 10, and 15 seconds. Additionally, we also offer a non-segmented version of the videos and the corresponding MPD for the movies of the animation genre, which allows for byte-range requests. The provided MPDs of the dataset are compatible with the current implementation of the DASH VLC Plugin, libdash, and DASH-JS. Furthermore, we provide a distributed DASH (D-DASH) dataset which is, at the time of writing, replicated on five sites within Europe, i.e., Klagenfurt, Paris, Prague, Torino, and Crete. This allows for a real-world evaluation of DASH clients that perform bitstream switching between multiple sites, e.g., this could be useful as a simulation of the switching between multiple Content Distribution Networks (CDNs).

DASH Online MPD Validation Service

The DASH online MPD validation service implements the conformance software of MPEG-DASH and enables a Web-based validation of MPDs based on a file, URI, and text. As the MPD is based on XML schema, it is also possible to use an external XML schema file for the validation.

DASH over CCN

Finally, the Dynamic Adaptive Streaming over Content Centric Networks (DASC áka DASH over CCN) implements DASH utilizing a CCN naming scheme to identify content segments in a CCN network. Therefore, the CCN concept from Jacobson et al. and the CCNx implementation (www.ccnx.org) of PARC is used. In particular, video segments formatted according to MPEG-DASH are available in different quality levels but instead of HTTP, CCN is used for referencing and delivery.

Conclusion

Our open source tool suite is available to the community with the aim to provide a common ground for research efforts in the area of adaptive media streaming in order to make results comparable with each other. Everyone is invited to join this activity – get involved in and excited about DASH.

Acknowledgments

This work was supported in part by the EC in the context of the ALICANTE (FP7-ICT-248652) and SocialSensor (FP7-ICT-287975) projects and partly performed in the Lakeside Labs research cluster at AAU.

References

[1] Sandvine, “Global Internet Phenomena Report 2H 2012”, Sandvine Intelligent Broadband Networks, 2012. [2] 3GPP TS 26.234, “Transparent end-to-end packet switched streaming service (PSS)”, Protocols and codecs, 2010. [3] A. Zambelli, “IIS Smooth Streaming Technical Overview,” Technical Report, Microsoft Corporation, March 2009. [4] R. Pantos, W. May, “HTTP Live Streaming”, IETF draft, http://tools.ietf.org/html/draft-pantos-http-live-streaming-07 (last access: Feb 2013). [5] Adobe HTTP Dynamic Streaming, http://www.adobe.com/products/httpdynamicstreaming/ (last access: Feb 2013). [6] ISO/IEC 23009-1:2012, Information technology – Dynamic adaptive streaming over HTTP (DASH) – Part 1: Media presentation description and segment formats. Available here [7] ITEC DASH, http://dash.itec.aau.at [8] libdash open git repository, https://github.com/bitmovin/libdash  

MPEG Column: 103rd MPEG Meeting

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— original post by Multimedia Communication blog, Christian Timmerer, AAU

 

The 103rd MPEG Meeting

The 103rd MPEG meeting was held in Geneva, Switzerland, January 21-15, 2013. The official press release can be found here (doc only) and I’d like to introduce the new MPEG-H standard (ISO/IEC 23008) referred to as high efficiency coding and media delivery in heterogeneous environments:

  • Part 1: MPEG Media Transport (MMT) – status: 2nd committee draft (CD)
  • Part 2: High Efficiency Video Coding (HEVC) – status: final draft international standard (FDIS)
  • Part 3: 3D Audio – status: call for proposals (CfP)

MPEG Media Transport (MMT)

The MMT project was started in order to address the needs of modern media transport applications going beyond the capabilities offered by existing means of transportation such as formats defined by MPEG-2 transport stream (M2TS) or ISO base media file format (ISOBMFF) group of standards. The committee draft was approved during the 101st MPEG meeting. As a response to the CD ballot, MPEG received more than 200 comments from national bodies and, thus, decided to issue the 2nd committee draft which will be publicly available by February 7, 2013.

High Efficiency Video Coding (HEVC) – ITU-T H.265 | MPEG HEVC

HEVC is the next generation video coding standard jointly developed by ISO/IEC JTC1/SC29/WG11 (MPEG) and the Video Coding Experts Group (VCEG) of ITU-T WP 3/16. Please note that both ITU-T and ISO/IEC MPEG use the term “high efficiency video coding” in the the title of the standard but one can expect – as with its predecessor – that the former will use ITU-T H.265 and the latter will use MPEG-H HEVC for promoting its standards. If you don’t want to participate in this debate, simply use high efficiency video coding.

The MPEG press release says that the “HEVC standard reduces by half the bit rate needed to deliver high-quality video for a broad variety of applications” (note: compared to its predecessor AVC). The editing period for the FDIS goes until March 3, 2013 and then with the final preparations and a 2 month balloting period (yes|no vote only) once can expect the International Standard (IS) to be available early summer 2013. Please note that there are no technical differences between FDIS and IS.

The ITU-T press release describes HEVC as a standard that “will provide a flexible, reliable and robust solution, future-proofed to support the next decade of video. The new standard is designed to take account of advancing screen resolutions and is expected to be phased in as high-end products and services outgrow the limits of current network and display technology.”

HEVC currently defines three profiles:

  • Main Profile for the “Mass-market consumer video products that historically require only 8 bits of precision”.
  • Main 10 Profile “will support up to 10 bits of processing precision for applications with higher quality demands”.
  • Main Still Picture Profile to support still image applications, hence, “HEVC also advances the state-of-the-art for still picture coding”

3D Audio

The 3D audio standard shall complement MMT and HEVC assuming that in a “home theater” system a large number of loudspeakers will be deployed. Therefore, MPEG has issued a Call for Proposals (CfP) with the selection of the reference model v0 due in July 2013. The CfP says that MPEG-H 3D Audio “might be surrounding the user and be situated at high, mid and low vertical positions relative to the user’s ears. The desired sense of audio envelopment includes both immersive 3D audio, in the sense of being able to virtualize sound sources at any position in space, and accurate audio localization, in terms of both direction and distance.”

“In addition to a “home theater” audio-visual system, there may be a “personal” system having a tablet-sized visual display with speakers built into the device, e.g. around the perimeter of the display. Alternatively, the personal device may be a hand-held smart phone. Headphones with appropriate spatialization would also be a means to deliver an immersive audio experience for all systems.”

Complementary to the CfP, MPEG also provided the encoder input format for MPEG-H 3D audio and a draft MPEG audio core experiment methodology for 3D audio work.

Publicly available MPEG output documents

The following documents shall be come available at http://mpeg.chiariglione.org/ (note: some may have an editing period – YY/MM/DD). If you have difficulties to access one of these documents, please feel free to contact me.

  • Study text of DIS of ISO/IEC 23000-13, Augmented Reality Application Format (13/01/25)
  • Study text of DTR of ISO/IEC 23000-14, Augmented reality reference model (13/02/25)
  • Text of ISO/IEC FDIS 23005-1 2nd edition Architecture (13/01/25)
  • Text of ISO/IEC 2nd CD 23008-1 MPEG Media Transport (13/02/07)
  • Text of ISO/IEC 23008-2:201x/PDAM1 Range Extensions (13/03/22)
  • Text of ISO/IEC 23008-2:201x/PDAM2 Multiview Extensions (13/03/22)
  • Call for Proposals on 3D Audio (13/01/25)
  • Encoder Input Format for MPEG-H 3D Audio (13/02/08)
  • Draft MPEG Audio CE methodology for 3D Audio work (13/01/25)
  • Draft Requirements on MPEG User Descriptions (13/02/08)
  • Draft Call for Proposals on MPEG User Descriptions (13/01/25)
  • Draft Call for Proposals on Green MPEG (13/01/25)
  • Context, Objectives, Use Cases and Requirements for Green MPEG (13/01/25)
  • White Paper on State of the Art in compression and transmission of 3D Video (13/01/28)
  • MPEG Awareness Event Flyer at 104th MPEG meeting in Incheon (13/02/28)

MPEG Column: 102nd MPEG Meeting

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— original post by Multimedia Communication blog, Christian Timmerer, AAU

The 102nd MPEG meeting was held in Shanghai, China, October 15-19, 2012. The official press release can be found here (not yet available) and I would like to highlight the following topics:

  • Augmented Reality Application Format (ARAF) goes DIS
  • MPEG-4 has now 30 parts: Let’s welcome timed text and other visual overlays
  • Draft call for proposals for 3D audio
  • Green MPEG is progressing
  • MPEG starts a new publicity campaign by making more working documents publicly available for free

Augmented Reality Application Format (ARAF) goes DIS

MPEG’s application format dealing with augmented reality reached DIS status and is only one step away from becoming in international standard. In a nutshell, the MPEG ARAF enables to augment 2D/3D regions of scene by combining multiple/existing standards within a specific application format addressing certain industry needs. In particular, ARAF comprises three components referred to as scene, sensor/actuator, and media. The scene component is represented using a subset of MPEG-4 Part 11 (BIFS), the sensor/actuator component is defined within MPEG-V, and the media component may comprise various type of compressed (multi)media assets using different sorts of modalities and codecs.

A tutorial from Marius Preda, MPEG 3DG chair, at the Web3D conference in August 2012 is provided below.

MPEG-4 has now 30 parts

Let’s welcome timed text and other visual overlays in the family of MPEG-4 standards. Part 30 of MPEG-4 – in combination with an amendment to the ISO base media file format (ISOBMFF) –  addresses the carriage of W3C TTML including its derivative SMPTE Timed Text, as well as WebVTT. The types of overlays include subtitles, captions, and other timed text and graphics. The text-based overlays include basic text and XML-based text. Additionally, the standards provides support for bitmaps, fonts, and other graphics formats such as scalable vector graphics.

Draft call for proposals for 3D audio

MPEG 3D audio is concerned about various test items ranging from 9.1 over 12.1 up to 22.1 channel configurations. A public draft call for proposals has been issued at this meeting with the goal to finalize the call and the evaluation guidelines at the next meeting. The evaluation will be conducted in two phases. Phase one for higher bitrates (1.5 Mbps to 265 kbps) is foreseen to conclude in July 2013 with the evaluation of the answers to the call and the selection of the “Reference Model 0 (RM0)” technology which will serve as a basis for the development of an 3D audio standard. The second phase targets lower bitrates (96 kbps to 48 kbps) and builds on RM0 technology after this has been documented using text and code.

Green MPEG is progressing

The idea between green MPEG is to define signaling means that enable energy efficient encoding, delivery, decoding, and/or presentation of MPEG formats (and possibly others) without the loss of Quality of Experience. Green MPEG will address this issue from an end-to-end point of view with the focus – as usual – on the decoder. However, a codec-centric design is not desirable as the energy efficiency should not be affected at the expenses of the other components of the media ecosystem. At the moment, first requirements have been defined and everyone is free to join the discussions on the email reflector within the Ad-hoc Group.

MPEG starts a new publicity campaign by making more working documents publicly available for free

As a response to national bodies comments, MPEG is starting from now on to make more documents publicly available for free. Here’s a selection of these documents which are publicly available here. Note that some may have an editing period and, thus, are not available at the of writing this blog post.

  • Text of ISO/IEC 14496-15:2010/DAM 2 Carriage of HEVC (2012/11/02)
  • Text of ISO/IEC CD 14496-30 Timed Text and Other Visual Overlays in ISO Base Media File Format (2012/11/02)
  • DIS of ISO/IEC 23000-13, Augmented Reality Application Format (2012/11/07)
  • DTR of ISO/IEC 23000-14, Augmented reality reference model (2012/11/21)
  • Study of ISO/IEC CD 23008-1 MPEG Media Transport (2012/11/12)
  • High Efficiency Video Coding (HEVC) Test Model 9 (HM 9) Encoder Description (2012/11/30)
  • Study Text of ISO/IEC DIS 23008-2 High Efficiency Video Coding (2012/11/30)
  • Working Draft of HEVC Full Range Extensions (2012/11/02)
  • Working Draft of HEVC Conformance (2012/11/02)
  • Report of Results of the Joint Call for Proposals on Scalable High Efficiency Video Coding (SHVC) (2012/11/09)
  • Draft Call for Proposals on 3D Audio (2012/10/19)
  • Text of ISO/IEC 23009-1:2012 DAM 1 Support for Event Messages and Extended Audio Channel Configuration (2012/10/31)
  • Internet Video Coding Test Model (ITM) v 3.0 (2012/11/02)
  • Draft Requirements on MPEG User Descriptions (2012/10/19)
  • Draft Use Cases for MPEG User Description (Ver. 4.0) (2012/10/19)
  • Requirements on Green MPEG (2012/10/19)
  • White Paper on State of the Art in compression and transmission of 3D Video (Draft) (2012/10/19)
  • White Paper on Compact Descriptors for Visual Search (2012/11/09)