Ganz zn-m2af User Manual page 14

PixelPro Series
H.264
This is a video compression standard that makes good use of bandwidth and which
could provide high-quality video streams at less than 1 Mbit/s.
The H.264 standard provides scope for a large range of different coding tools for use by
various applications in different situations, and the GANZ PixelPro provides certain
subsets of these tools.
Using H.264, it is also possible to control the bit rate, which in turn allows the amount of
bandwidth usage to be controlled. CBR (Constant Bit Rate) is used to achieve a specific
bit rate by varying the quality of the H.264 stream. While using VBR (Variable Bit Rate),
the quality of the video stream is kept as constant as possible, at the cost of a varying
bit rate.
Motion JPEG
This format uses standard JPEG still images in the video stream. These images then
are displayed and updated at a rate sufficient to create a stream that shows constantly
updated motion.
The Motion JPEG stream uses considerable amounts of bandwidth, but also provides
excellent image quality and access to every individual image contained in the stream.
Multiple clients accessing Motion JPEG streams could use different image settings.
Codec
H.264 / MJPEG
Size
Video output resolution. See the next page for the output resolution table.
Frame rate
1~30fps in normal mode (1~15fps for slow shutter mode)
Note: If the slow shutter mode is turned on and the low light condition is met, the
frame rate is automatically goes down. In this case, the frame is half of the
normal mode.
GOP Size
1 ~ 60 frames
Bit-rate control (CBR or VBR)
When using H.264 compression, if there is only limited bandwidth available, a constant
bit rate(CBR) is recommended, although this may compromise image quality. Use a
variable bit rate(VBR) for the best possibly image quality.
Average Bit-rate (512Kbps ~ 10Mbps)
Recommended bit rate for D1: 800Kbps ~ 1Mbps
Recommended bit rate for 1.3M(720p): 3Mbps ~ 4Mbps
Recommended bit rate for 2.0M(1080p): 6Mbps ~ 8Mbps
10-2014-A
ZN-M2AF User's Manual
13