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Video formats, modes and bandwidth
OSCAR Technical Manual V2.4.0
134
As already mentioned, the recommended limit for transferring isochronous
image data is 1000q (quadlets) per cycle or 4096 bytes (with 400 Mbit/s of
bandwidth).
The third table shows that in Format_2 Mode_2 @ 7.5 fps a camera has to
send 1280 pixels or 1 line of video per cycle. The camera therefore uses 32%
of available bandwidth. This allows up to three cameras with these settings
to be operated independently on the same bus.
Format Mode Resolution Color Mode 60
fps
30
fps
15
fps
7.5
fps
3.75
fps
1.875
fps
2
0
1280 x 960
16 bit/pixel
YUV (4:2:2) 1H
1280p
640q
1/2H
640p
320q
1/4H
320p
160q
1
1280 x 960
24 bit/pixel
RGB 1H
1280p
960q
1/2H
640p
480q
1/4H
320p
240q
2
1280 x 960
8 bit/pixel
Y (MONO8) 2H
2560p
640q
1H
1280p
320q
1/2H
640p
160q
1/4H
320p
80q
3
1600 x 1200
16 bit/pixel
YUV (4:2:2) 5/4H
2000p
1000q
5/8H
1000p
500q
5/16H
500p
250q
4
1600 x 1200
24 bit/pixel
RGB 5/8H
1000p
750q
5/16
500p
375q
5
1600 x 1200
8 bit/pixel
Y (MONO8) 5/2H
4000p
1000q
5/4H
2000p
500q
5/8H
1000p
250q
5/16H
500p
125q
6
1280 x 960
16 bit/pixel
Y (MONO16) 1H
1280p
640q
1/2H
640p
320q
1/4H
320p
160q
7
1600 x 1200
16 bit/pixel
Y (MONO16) 5/4H
2000p
1000q
5/8H
1000p
500q
5/16H
500p
250q
Table 54: Format_2
Note
L
• If the cameras are operated with an external trigger the
maximum trigger frequency may not exceed the highest
continuous frame rate, so preventing frames from being
dropped or corrupted.
• IEEE 1394 adapter cards with PCILynx™ chipsets have a
lower limit of 4000 bytes per cycle.