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46 Personal Video Recorder
Video
Format
IBP
Frames
(Mbps)
Minimum
CPU
Required
I-Frame
Only
(Mbps)
Minimum
CPU
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.
If your system is not capable of achieving smooth-looking video, try the
following:
• Record I frames only.
• Record using a smaller frame size.
ATI VCR is best suited for Personal Video Recorder use.
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.