ATI Technologies 137-40188-60 Minimum Frame Frames, Only, Format, Mbps Required 160x120, 352x240

Using Your ATI Multimedia Center 43

Video	IBP	Minimum	I-Frame	Minimum
	Frames	CPU	Only	CPU
Format
	(Mbps)	Required	(Mbps)	Required
160x120	1.0	P200-MMX	1.0	P200-MMX
352x240	1.5	PII-266	2.0	P200-MMX
320x480	3.0	PII-400	4.0	PII-266
640x480	4.0	Athlon 600	6.0	PIII-450
720x480	4.0	Athlon 700	6.0	PIII-450

Mbps = Megabits per second, or millions of bits per second. 1 Mbps is approximately 125Kbytes/second.

•The motion estimation slider can be used to control the quality of the video – a high setting (75 or more) uses more CPU, but provides better quality video. A low setting (25 or less) speeds up encoding, but produces lower quality video at a given bit-rate.

•The above bit-rate settings are based on a motion estimation setting of 10.

•If your system is not capable of achieving smooth-looking video at 29.97, try the following:

•Capture I frames only.

•Capture using a smaller frame size.

•Capture video only, with no audio.

MPEG-1 decoders are widely used, so video encoded in MPEG-1 format can be played on many PCs. However, MPEG-1 playback on a PC uses the Microsoft MPEG-1 decoder, which may not provide the best performance.

MPEG-2 playback on a PC requires an MPEG-2 decoder. With ATI graphics cards, MPEG-2 decoders use the ATI hardware IDCT and motion compensation, which provides higher resolution video playback and less CPU loading than the Microsoft MPEG-1 decoder.