![Page 1: Study of no reference video quality metrics for hevc compression](https://reader035.vdocument.in/reader035/viewer/2022062523/58a12fb11a28abd34f8b52e3/html5/thumbnails/1.jpg)
Study of NR Video Quality Metrics for HEVC Compression
K. Rouis, J. Bel Hadj Tahar, M. Leszczuk, L. Janowski, Z. Papir
![Page 2: Study of no reference video quality metrics for hevc compression](https://reader035.vdocument.in/reader035/viewer/2022062523/58a12fb11a28abd34f8b52e3/html5/thumbnails/2.jpg)
Outline• ITU-T normalised models• Work of Video Quality Experts Group (VQEG)• Sources and compressions• Video Quality Metric (VQM) as ground truth• Pearson correlations• Analysis of results• Further work and conclusions
![Page 3: Study of no reference video quality metrics for hevc compression](https://reader035.vdocument.in/reader035/viewer/2022062523/58a12fb11a28abd34f8b52e3/html5/thumbnails/3.jpg)
ITU-T Normalised Models
Type of ITU-T ModelFull
Reference (FR)
Reduced Reference
(RR)
NoReference
(NN)
Resolution
HDTV J.341 n/a n/a
SDTV J.144 n/a n/a
VGA J.247 J.246 n/a
CIF J.247 J.246 n/a
QCIF J.247 J.246 n/a
![Page 4: Study of no reference video quality metrics for hevc compression](https://reader035.vdocument.in/reader035/viewer/2022062523/58a12fb11a28abd34f8b52e3/html5/thumbnails/4.jpg)
Work of VQEG• Working on NR
quality metrics• Focus on major
H.264 artefacts:• Blockiness• Blur
• But since 2013 –H.265 (HEVC)
Metrics still applicable?
![Page 5: Study of no reference video quality metrics for hevc compression](https://reader035.vdocument.in/reader035/viewer/2022062523/58a12fb11a28abd34f8b52e3/html5/thumbnails/5.jpg)
Sources and Compressionssrc01 src02 src03 src04 src05 src06 src07 src08 src09 src10
Param ValueWIDTH 1280
GOPTYPESIZE GOP8RATECONTROL QP 26, 32, 38, 46
RATECONTROL FRAME Mbit/s 1, 2, 4, 8, 16REFRESH 1
INTRAPERIOD 16SLICE ARGUMENT 0
![Page 6: Study of no reference video quality metrics for hevc compression](https://reader035.vdocument.in/reader035/viewer/2022062523/58a12fb11a28abd34f8b52e3/html5/thumbnails/6.jpg)
VQM as Ground Truth
Metric
Scores
Model
Metric
VQM
Model
![Page 7: Study of no reference video quality metrics for hevc compression](https://reader035.vdocument.in/reader035/viewer/2022062523/58a12fb11a28abd34f8b52e3/html5/thumbnails/7.jpg)
Pearson Correlations• Negative
Blockiness – OK!
• Blur > Blockiness
• src09 – complex motion
• src10 – opposite to expected
Source Blockiness Blursrc01 -0.67 1.00
src02 -0.97 0.91
src03 -0.97 0.96
src04 -0.77 0.99
src05 -0.87 0.99
src06 -0.57 0.91
src07 -0.96 0.96
src08 -0.95 0.92
src09 -0.36 0.95
src10 +0.69 0.99
![Page 8: Study of no reference video quality metrics for hevc compression](https://reader035.vdocument.in/reader035/viewer/2022062523/58a12fb11a28abd34f8b52e3/html5/thumbnails/8.jpg)
Analysis of ResultsVQM for blockiness: VQM for blur:
![Page 9: Study of no reference video quality metrics for hevc compression](https://reader035.vdocument.in/reader035/viewer/2022062523/58a12fb11a28abd34f8b52e3/html5/thumbnails/9.jpg)
Future Work/Conclusions
H.264 H.265≟
More sources
VQM Ground Truth≟