An Efficient Hierarchical Video Coding Scheme Combining Visual Perception Characteristics

Table 2

Performance of the proposed algorithm compared with H.264/AVC standard.

Video sequence	QP	ΔTime (%)	ΔBit rate (%)	ΔPSNR-Y (dB)	ΔROI-PSNR-Y (dB)
Foreman	28	−71.24	+2.19	−0.30	−0.25
	32	−71.92	+2.15	−0.29	−0.21
	36	−70.81	+2.06	−0.17	−0.15
Hall	28	−83.64	+1.24	−0.21	−0.19
	32	−84.27	+1.17	−0.22	−0.14
	36	−84.98	+1.12	−0.19	−0.13
Salesman	28	−76.43	+2.12	−0.26	−0.21
	32	−75.92	+1.87	−0.20	−0.15
	36	−76.01	+1.83	−0.14	−0.12
Car-phone	28	−73.85	+2.84	−0.32	−0.24
	32	−73.36	+2.57	−0.21	−0.19
	36	−74.96	+1.69	−0.14	−0.12
News	28	−85.47	+2.14	−0.13	−0.11
	32	−85.84	+2.13	−0.12	−0.07
	36	−85.93	+1.86	−0.09	−0.08
Coastguard	28	−61.24	+2.47	−0.28	−0.24
	32	−62.35	+2.13	−0.29	−0.26
	36	−62.62	+1.76	−0.21	−0.18
Paris	28	−84.12	+1.07	−0.29	−0.23
	32	−84.61	+1.15	−0.22	−0.21
	36	−84.97	+1.03	−0.21	−0.17
Silent	28	−80.14	+1.51	−0.24	−0.18
	32	−80.86	+1.42	−0.18	−0.15
	36	−81.32	+1.17	−0.11	−0.09
Mother and Daughter	28	−83.76	+1.85	−0.18	−0.14
	32	−83.89	+1.64	−0.10	−0.10
	36	−84.21	+0.09	−0.08	−0.05
Akiyo	28	−85.64	+1.87	−0.11	−0.09
	32	−85.76	+1.21	−0.08	−0.07
	36	−86.41	+0.08	−0.07	−0.06
Average results
QP	28	−78.55	+1.93	−0.188	−0.153
	32	−78.88	+1.74
	36	−79.22	+1.27

Description: The symbol “+” means enhancement or increase; symbol “−” means decrement or decrease. PSNR-Y means the peak signal-to-noise ratio of luminance, and it also represents the quality of the reconstructed video image. ΔPSNR-Y means the difference of the PSNR-Y. ΔROI-PSNR-Y means the non-zero region of the ΔPSNR-Y in visual perception characteristics mark.