Video Quality Experts Group (VQEG)

VEG Audiovisual Model Validation (AVHD-AS) and ITU-T Study Group 12 P.NATS Phase 2

AVHD-AS / P.NATS Phase 2 Project, March 2017 to January 2020 (finished)

AVHD-AS/P.NATS Phase 2 was a joint project of VQEG and ITU-T Study Group 12 Question 14. The goal was to develop a multitude of objective models, varying in terms of complexity / type of input / use-cases for the assessment of video quality in adaptive bitrate streaming services over reliable transport up to 4K.

The project plan specified (step 1) the model validation process and (step 2) a procedure to merge high performing models, to create a single model in each category. In the bitstream model category, high performing models were identified but disagreements in step 2 became an obstacle. High performing models in other categories led to the approval of:

The "AVHD-AS / P.NATS Phase II Final Report" is available here.

For a description of the AVHD-AS / P.NATS Phase II validation test, see:

A. Raake et al., "Multi-Model Standard for Bitstream-, Pixel-Based and Hybrid Video Quality Assessment of UHD/4K: ITU-T P.1204," in IEEE Access, vol. 8, pp. 193020-193049, 2020, doi: 10.1109/ACCESS.2020.3032080.

TU Ilmenau created and published a database during this effort. This is not part of the training and validation set. The other datasets are not currently available.

Question relating to this project should be sent to Shahid Mahmood Satti, Silvio Borer, Alexander Raake, and Jörgen Gustafsson.

VQEG is Co-Chaired by: Margaret Pinson, NTIA/ITS and Kjell Brunnström, RISE Research Institute of Sweden AB
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