International organisation for standardisation organisation internationale de normalisation

m31680

Summary: Two defect: 1) data_offset setting is not clear. 2) the definition of bandwidth needs clarification.

Disposition: Accepted. Defect 1 is purely editorial and will be fixed in FDIS. Defect 2 to be included in DuI.

5. m31405

Summary: Reports the performance of DASH with HTTP 2.0. 2.0 performs as good as HTTP 1.1 but how to use it would be good to highlight.

Also studies DASH to be used in Content Centric Networks (CCN):

• 
  Two methods:
  

1. 
   Proxy translating the DASH URLs to CCN URI
   
2. 
   MPD with CCN URI
   
• 
  CCN URI are not as efficient as HTTP 1.1
  
• 
  CCN supporting caching and intrinsic multicast
  
• 
  Only solution might be the use document relative URL.
  

Disposition: Accepted with revision. To add an informative section in TuC on use of DASH with HTTP 2.0.

1. m31303

Summary: proposes using a metadata track to convey encryption information per sample. It should be discussed in FF breakout group.

Disposition: Noted.

2. m31461

Summary: proposes to define a mechanism to convey intended content characteristics in MPD.

Disposition: Partially accepted.

1. 
   Add in Defect under Investigation: adaptation sets shall be created such that allows seamless switching.
   
2. 
   Establish CE for investigating the method of signaling intended content/display characteristics including signaling through @profile or explicit signaling in MPD with new element/attribute
   
   • 
     CE Name: Signaling Intended Content and Display (SIC)
     

3. m31594

Summary: propose to be able to signal various conditions such as ambient and distance viewing condition at each adaptation sets.

Disposition: Noted. A section to be added in TuC for Part 3 on the utilization of Essential/Supplementary Descriptors.

4. m31371

Summary: proposes to have precise definition for “seamless switching” and “switching point”.

Disposition: Noted. Add a definition of “seamless switching” to Part 1 clause 3. To be added in TuC:

• 
  “A switch is consider seamless if Representation one is correctly presented up to time t and Representation two is presented from time t on, as if it would have been decoded and presented without switching from prior time t.”
  

5. m31474

Summary: Reporting the use of SVC with DASH. To make it more efficient, for each resolution, one SVC set is used that utilizes SNR scalability. Shows that if each enhancement is stored in a separate file, they can be streamed more efficiently.

Disposition: Noted.

6. m31593

Summary: Proposes an extended profile mainly targeted for advertising support, using xlink and new features of Part 1 2^nd edition.

Disposition: Accepted. To be included in TuC. Send a summary to external organizations to get comment.

6. Action Points

20. Conformance and Ref. SW. for DASH (23009-2)

    1. Topics

       1. ISO/IEC 23009-2 1^st edition

2. Contributions

Number	Session	Title	Source	Dispositions
m31391	DASH	Proposed draft for Amd.1 of MPEG-DASH conformance and reference software	Christian Timmerer, Markus Waltl, Benjamin Rainer	Accepted N13978
m31392	DASH	Updates for MPEG-DASH reference access client (libdash)	Christian Timmerer, Christopher Müller	Accepted N13978
m31393	DASH	Updates for MPEG-DASH MPD Schema Validator	Christian Timmerer, Benjamin Rainer	Accepted N13978
m31460	DASH	Updates to DASH Conformance	Thomas Stockhammer, Waqar Zia	Accepted N13978

3. Summary of discussions

   1. m31391

Summary: Provides parts taken out from 1^st edition for Amd 1.

Disposition: Accepted. Start 2^nd edition of Part 2, instead of Amd 1, issue 1^st WD at this meeting. The Part 2 2^nd edition must test conformance for both Part 1 1^st and 2^nd editions. Specifically, it must test MPD conformance by the method described in Part 1 2^nd Ed 5.2.1 against elements and attributes described in 5.2.3.

2. m31392

Summary: Added the quality metrics.

Disposition: Accepted. Include this contribution into the 2^nd edition WD.

3. m31393

Summary: Update rules on new features of the 2^nd edition WD.

Disposition: Accepted. Include this contribution into the 2^nd edition WD.

4. m31460

Summary: Updates on segment conformance for Amd1 and some bug fixes.

Disposition: Accepted. Include this contribution into the 2^nd edition WD. Also update the text of the 2^nd edition WD with the rules regarding 1^st Amd features and MPD @bandwidth verification.

General recommendation: to mandate the next ad-hoc to generate a table of Part 1 2^nd edition features (elements and attributes, and segment features) that are currently covered by conformance test vectors and identify the parts that are missing.

4.