VQEG提出的3DTV图像质量主观测试评价方法

ACR is suitable in term of its stability and assessing time.
Propose using ACR with more than 28 participants for 3D video
Scores of 42 participants P1 : Score=4 P2 : Score=5
0.06
12 16 20 24 28 32 36 40 44 M Normalized MCI of ACR with 24 participants for 2D video

To satisfy the criterion (Normalized MCI < 0.09) 28 people must participate in ACR 23 people must participate in DCR 36 people must participate in DSCQS
0.46 0.42 0.38 0.34 0.30 0.26 0.22
DCR
3D 2D
10 9 8 7 6 5 4
DSCQS
3D 2D
MCI
MCI
12 16 20 24 28 32 36 40 44 M
12 16 20 24 28 32 36 40 44 M

In DCR and DSCQS, it might be easy for participants to evaluate 3D video quality because there is a reference video In ACR, it might be difficult for participants to evaluate 3D video quality because they do not have a criterion for evaluating 3D video quality due to lack of viewing experience

0.15
Normalized MCI
0.12 0.09
ACR DCR DSCQS
0.06
12 16 20 24 28 32 36 40 44 M
MCI NormalizedMCI MOSmax MOSmin
0.15
Normalized MCI
0.12 0.09
ACR DCR DSCQS
Scores of M participants P1 : Score=4 P2 : Score=5 Randomly select Calculate MCI
MCI
P42 : Score=5

P42 : Score=5
Selection and calculation were repeated 15 times MCI in graph plots average of 15 MCIs

Conducted subjective quality assessment for ACR, DCR, and DSCQS to compare their stabilities in 3D video

Experimental results showed that ACR is suitable in terms of its stability and assessing time
DCR is suitable in term of M However, the assessing time of DCR is twice as long as that of ACR

Assessing time of ACR per participant is T If “Normalized MCI < 0.09” is needed ACR requires 28T (T * 28 people) DCR requires 46T (2T * 23 people) DSCQS requires 144T (4T * 36 people)

MCI of ACR for 3D video was larger than that for 2D video.
0.46 0.42 0.38 0.34 0.30 0.26 0.22
ACR
3D 2D
MCI
Hale Waihona Puke Baidu
12 16 20 24 28 32 36 40 44 M

No significant difference in MCI of DCR and DSCQS between 2D and 3D videos.
Experiment for 3D video Experiment for 2D video Video 1920x1080/24p 1920x1080/24p format (Dual channel) Video codec H.264/AVC codec Bit-rate 3, 4.5, 6, 12 2, 3, 6, (Total bit-rate of dual channel), Uncompressed Uncompressed Video 8 videos 8 videos (Left channel of 3D video) content Assessment ACR 5-grade-scale method method DCR 5-grade-scale method DSCQS method Participant 42 people Monitor 40-inch True3Di (3D mode) 40-inch True3Di (2D mode) with polarized glasses without polarized glasses