Efficient Region-of-Interest Scalable Video Coding with Adaptive Bit-Rate Control

Table 5

FMO: four-layer coding versus eight-layer coding (“STOCKHOLM”, 30 fps, 96 frames, GOP size is 8).

Quantization parameters	Four layers; (one 640 × 360 layer, and three 720p layers) by using the FMO		Eight layers; (two CIF layers, three SD layers, and three 720p layers)		Bit-rate savings (%)
	PSNR [dB]	Bit-rate [kb/s]	PSNR [dB]	Bit-rate [kb/s]
32	34.5	2566.2	34.5	3237.0	20.7
34	33.9	1730.2	33.9	2359.1	26.7
36	33.3	1170.0	33.3	1759.0	33.5