User`s manual

Moxa VPort 16-M12 System Configuration
4-27
Resolution NTSC PAL
SVGA 800 x 600 800x 600
Full D1 720 x 480 720 x 576
4CIF 704 x 480 704 x 576
VGA 640 x 480 640 x 480
CIF 352 x 240 352 x 288
QCIF 176 x 112 176 x 144
Max. FPS (Frame per second)
Setting Description Default
Maximum frame rate The maximum frame rate is different to accommodate different
modulations of video input. Administrators can also set
up the
maximum frame rate to optimize bandwidth use.
NTSC: 1, 3, 5, 10, 15, 20, 25, 30
PAL: 1, 3, 5, 8, 12,16, 20, 25
30 for NTSC, 25 for
PAL
NOTE
Frame rate (frames per second) is determined by the resolution, image data size (bit rate), and transmission
traffic status. The Administrator and users can check the frame rate status in the
FPS Status
on the VPort’s
web homepage.
NOTE
The VPort 16
-
M12 supports a maximum of three simultaneous video streams, and the FPS will be affected when
all three video streams are enabled. If the video quality is set very high for all three video streams, the total FPS
for the three streams combined is about 75. We strongly recommended that you configure these three video
streams based on specific requirements to optimize video performance.
Video Quality Control
Video Quality Control is used to optimize the bandwidth of the MPEG4 video stream. There are 2 modes for
video quality control.
Setting Description Default
Fixed bit rate
(Only for H.264)
The administrator can fix the bandwidth to tune the video
quality and FPS (frames per second) to the optimum
combination.
Different resolutions have
different bandwidth parameters. The
VPort will tune the video performance according to the
bandwidth. A higher bandwidth means better quality and
higher FPS.
600Kbps in 800x600
resolution
Fixed Quality The administrator can set the image quality to one of 5
standards: Medium, Standard, Good, Detailed, or
Excellent. The VPort will tune the bandwidth and FPS
automatically to the optimum combination.
Good
Video
Size
Bit rate
800x600 720x480(NTSC)
720x576(PAL)
704x480(NTSC)
704x576(PAL)
640x480(NTSC)
640x480(PAL)
352x240(NTSC)
352x288(PAL)
176x122(NTSC)
320x288(PAL)
B1 600 kbps 518 Kbps 507 Kbps 384 Kbps 126 Kbps 31 Kbps
B2 1200 kbps 1036 Kbps 1014 Kbps 768 Kbps 253 Kbps 63 Kbps
B3 1800 kbps 1555 Kbps 1521 Kbps 1152 Kbps 379 Kbps 95 Kbps
B4 2400 kbps 2073 Kbps 2028 Kbps 1536 Kbps 506 Kbps 126 Kbps
B5 3000 kbps 2592 Kbps 2535 Kbps 1920 Kbps 633 Kbps 158 Kbps
B6 3600 kbps 3110 Kbps 3042 Kbps 2304 Kbps 759 Kbps 290 Kbps
B7 4200 kbps 3628 Kbps 4549 Kbps 2688 Kbps 886 Kbps 221 Kbps