Optimized Rate Control Algorithm of High-Efficiency Video Coding Based on Region of Interest

Table 3

Experimental comparison data between the ORC algorithm and algorithm in [31].

		Target bit rate (kbps)	Algorithm in [31]			ORC algorithm			(dB)
			Y-PSNR (dB)	Actual coding bit rate (kbps)	(%)	Y-PSNR (dB)	Actual coding bit rate (kbps)	(%)
	Traffic	500	32.16	500.294	0.294	32.17	500.125	0.125	0.01
		1000	34.45	1000.018	0.018	34.44	1000.227	0.227	0.01
		2000	36.78	2000.215	0.215	36.82	2000.016	0.016	0.04
		4000	38.99	4000.035	0.035	39.02	4000.108	0.108	0.03
	PeopleOnStreet	500	36.89	500.214	0.214	36.88	500.136	0.136	0.01
		1000	38.04	1000.193	0.193	38.12	1000.225	0.225	0.08
		2000	40.24	1999.245	0.756	40.26	2000.114	0.114	0.02
		4000	42.53	4000.213	0.213	42.57	4000.107	0.107	0.04
	BasketballDrive	500	29.16	500.312	0.312	29.25	500.141	0.141	0.09
		1000	31.43	1000.294	0.294	31.48	1000.113	0.113	0.05
		2000	33.57	2000.183	0.183	33.59	2000.116	0.116	0.02
		4000	35.81	4000.247	0.247	35.90	4000.000	0.000	0.09
	Parkscene	500	33.29	500.183	0.183	33.35	499.847	0.153	0.06
		1000	35.46	1000.216	0.216	35.50	1000.218	0.218	0.04
		2000	37.73	1999.594	0.406	37.77	2000.236	0.236	0.04
		4000	40.41	4000.214	0.214	40.46	4000.231	0.231	0.05
	FourPeople	500	37.15	500.204	0.204	37.19	500.691	0.691	0.04
		1000	39.95	1000.157	0.157	39.97	1000.637	0.637	0.02
		2000	41.88	2000.248	0.248	41.92	2000.314	0.314	0.04
		4000	43.65	4000.312	0.312	43.71	4000.105	0.105	0.06
	Johnny	500	38.85	504.137	4.137	38.87	500.411	0.411	0.02
		1000	41.67	999.084	0.084	41.72	999.579	0.421	0.05
		2000	43.75	2000.253	0.253	43.82	2000.304	0.304	0.07
		4000	46.17	4000.178	0.178	46.25	4000.225	0.225	0.08
	BasketballDrill	500	32.13	500.217	0.217	32.15	500.117	0.117	0.02
		1000	35.02	1000.014	0.014	35.05	1000.206	0.206	0.03
		2000	38.28	2000.178	0.178	38.33	2000.041	0.041	0.05
		4000	41.60	4000.159	0.159	41.63	4000.100	0.100	0.03
	BQMall	500	29.82	500.217	0.217	29.88	500.171	0.171	0.06
		1000	32.18	1000.084	0.084	32.25	1000.231	0.231	0.07
		2000	35.06	2000.315	0.315	35.13	2000.036	0.036	0.07
		4000	37.59	4000.169	0.169	37.65	4000.245	0.245	0.06
	BasketballPass	500	36.85	500.037	0.037	36.90	500.045	0.045	0.05
		1000	40.45	999.176	0.824	40.48	1000.321	0.321	0.03
		2000	42.97	2000.154	0.154	43.04	1999.796	0.204	0.07
		4000	45.68	4000.013	0.013	45.73	4000.113	0.113	0.05
	BQSquare	500	31.73	500.043	0.043	31.76	500.168	0.168	0.03
		1000	34.39	1000.115	0.115	34.42	1000.112	0.112	0.03
		2000	36.82	2000.245	0.245	36.85	2000.009	0.009	0.03
		4000	41.15	4000.169	0.169	41.21	4000.105	0.105	0.06
Average					0.220			0.190	0.045