Software based on different technologies

Technology	Bandwidth	Resolution	Frame Rate	Network	Cost
I-Stream	128kb-1Mb*1	768x576	25 fps(PAL) 30fps(NTSC)	ISDN 128k ADSL 256k-8M DDN 2M VPN 1-2M	Medium
MPEG-4	128-512Kb	384x288	25 fps	ISDN 128Kb VPN 1-2Mb Dedicated network and LAN 10-100MB	Very expensive *2
H.323	128-512Kb	384x288	15 fps	ISDN DDN	Expensive
H.320	56-128Kb	176x144	15 fps	ISDN DDN	Expensive
H.263	56-64Kb	176x144	10 fps	ISDN DDN 56K modem	Low
MPEG	1.5Mb	384x288	25 fps	LAN 10-100Mb VCD	Medium
MPEG-2	10Mb	704x576	25 fps	Optical fibre connection LAN 100Mb DVD	Very High
MPEG-3	40Mb	1152x796	25 fps	Optical fibre connection HDTV	Very high

Note: *1. Resolution can be adjusted to suite different bandwidth.
*2. Real-time CODEC equipment for high resolution is very expensive.

CODEC TECHNOLOGIES COMPARISON

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