Organisation internationale de normalisation

Action Points

ISO/IEC FDIS 23001-10 (SC 29 N 14805)

Part 10: Carriage of Timed Metadata Metrics of Media in ISO Base Media File Format

FDIS (2015-07-12)

19. Green Metadata (23001-11)

    1. Topics

       1. Green Metadata

2. Contributions

Number	Session	Title	Source		Dispositions
m36216		Table of Replies on ISO/IEC FDIS 23001-11	ITTF via SC 29 Secretariat		Noted
m36208	Green	Summary of Voting on ISO/IEC 23001-11:201x/PDAM 1	SC 29 Secretariat		Refer N15506
m36578	Green	Green Metadata Verification Test Report	Felix C. Fernandes, Xavier Ducloux, Spencer Cheng	Accepted N15508
m36401	Green	Evaluation of the Green Metadata	yahia benmoussa, , Nicolas Tizon, , Nicolas Derouineau, , Eric SENN	Noted
m36398	Green	Proposed reference bitstreams for Green MPEG Compliance	Nicolas DEROUINEAU, Nicolas TIZON, Didier NICHOLSON	Noted
m36381	Green	Demo of Energy-efficient media selection in DASH	Xavier Ducloux, Patrick Gendron		Noted
m36394	Green	Detailed Evaluation of Tunable Image Quality HEVC Decoding	Erwan Raffin, Morgan Lacour, Erwan Nogues, Maxime Pelcat, Daniel Ménard	Noted
m36402	Green	Enhancement of "dequantization and inverse transform" metadata	yahia benmoussa, , eric senn	Noted
m36671	Green	Entropic Decoding Analysis for Green MPEG	cyril Bergeron, Florian Broekaert	Noted
m36699	green	Best Effort Decoding for Green MPEG - Device Power Analysis	Steve Saunders, Alexis Tourapis, Krasimir Kolarov, David Singer	Not uploaded

1. Summary of discussions

   1. M6381: Demo of Energy-efficient media selection in DASH

• 
  The demo simulates battery depletion and video streaming of 10 representations (5 resolutions x 2 bitrates). Each representation consisted of 3 sequences concatenated into a single bitstream.
  
• 
  Four scenarios were demonstrated on a tablet:
  
  1. 
     The traditional DASH scenario in which selection is based on network conditions. If network conditions are good, then the battery is depleted quickly.
     
  2. 
     The simplest representation is chosen. This provides poor quality.
     
  3. 
     A reactive power saving mode which has a one- to two-segment delay in selecting the appropriate representation for power saving. This leads to poor quality at scene changes.
     
  4. 
     A proactive power saving mode that uses Green Metadata to anticipate video complexity changes and thus provides good quality.
     

1. M36394: Detailed Evaluation of Tunable Image Quality HEVC Decoding

• 
  The contribution fixed a bug that resolved the chroma artifacts in m36024.
  
• 
  New luma interpolation filters are proposed and PSNR results for Y, U, V are shown across 4 bitstreams and 4 bitrates.
  
• 
  The decoding-time reduction (compared to a compliant decoder) and PSNR were
  

shown to be proportional to the activation level.

• 
  The decoded bitstreams were viewed by the group and no artifacts were observed.
  
• 
  Results were also provided to show a comparison between an optimized compliant decoder and an optimized tunable decoder. Up to 22% decoding-time reduction was observed in the optimized tunable decoder compared to the optimized compliant decoder.
  
• 
  The proponent is encouraged to continue the study and to provide energy measurements on a mobile platform across a wide range of bitstreams such as the gamma anchor that was used for the Green MPEG CfP.
  

1.