Optimized Sample Adaptive Offset Filter in HEVC

Table 4

BD degradation: HM 16.20 + SCM 8.8 vs. proposed system.

HM 16.20 + SCM 8.8
Test set		AI	RA	LDB	LDP
Class A (4K × 2K)	Traffic	1.2	1.3	—	—
	People on street	1.3	2.2	—	—
Class B (1080P)	Cactus	0.6	2.5	2.7	10.2
	Park scene	0.6	0.9	1.6	9
	Basketball drive	0.3	1.5	1.3	8
Class C (WVGA)	Party scene	0.3	−0.2	0.7	4.3
	BasketballDrill	1.2	1.6	2.7	6.2
Class D (WQVGA)	Blowing bubbles	0.3	−0.6	0	2.8
	BasketballPass	0.5	0.8	1.3	4.9
Class E (720P)	Kristena and Sara	0.8	—	2.4	11
	Johnny	0.5	—	1.8	13.4
	Four people	0.8	—	2.5	8.9
Class F	Slide show	1.7	1.8	6.1	12.5
	BasketballDrill text	1.4	3	3.7	22.5
Proposed system
Class A (4K × 2K)	Traffic	0.1	0	—	—
	People on street	0.2	0.3	—	—
Class B (1080P)	Cactus	0.2	0.2	0.4	2.1
	Park scene	0.2	0.1	0.4	1.2
	Basketball drive	0.3	0.4	0.3	1.5
Class C (WVGA)	Party scene	0.2	−0.4	0.5	1
	BasketballDrill	0.3	0.4	0.7	1.6
Class D (WQVGA)	Blowing bubbles	0.1	−0.1	0.1	0.6
	BasketballPass	0.1	0.2	0.7	0.9
Class E (720P)	Kristen and Sara	0.2	—	0.1	0.4
	Johnny	0.1	—	0.1	0.7
	Four people	0.2	—	0.1	0.3
Class F	Slide show	2.1	1	1.4	0.3
	BasketballDrill text	0.4	1.3	2.1	1
Summary	Test set	HM 16.20 + SCM 8.8
		AI	RA	LDB	LDP
	Class A	1.1	1.65	—	—
	Class B	0.46	1.56	1.8	9.5
	Class C	0.65	0.8	1.7	5.2
	Class D	0.25	−0.05	0.55	3.7
	Class E	0.55	—	2.15	11
	Class F	1.5	1.95	5.1	17.85
		Proposed system
	Class A	0.3	0.3	—	—
	Class B	0.3	0.35	0.75	1.7
	Class C	0.4	0.05	0.85	1.6
	Class D	0.2	0.15	0.6	1.05
	Class E	0.3	—	0.15	0.7
	Class F	1.45	1.4	2.05	0.9