User`s manual

Moxa VPort 26 System Configuration
4-32
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)
176x112(NTSC)
176x144(PAL)
B0 267 kbps 230 Kbps 225 Kbps 170 Kbps 56 Kbps 14 Kbps
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
NOTE
The image quality, FPS, and bandwidth are influenced significantly by network throughput, system network
bandwidth management, applications the VPort
runs (such as VMD), how complicated the image is, and the
performance of your PC or notebook when displaying images. The administrator should take into consideration
all of these variables when designing the video over IP system, and when specifying the requirements for the
video system.
Audio
Audio Source
The VPort supports real-time and synchronous video/audio transmission. Administrators need to select the
correct audio input type to avoid audio input distortion.