Mini Dome Series | User Manual
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Table 3 - 2: Edit Profile Options
Item
Option
Description
Video Codec
MJPEG
H.264
MJPEG:
Each video frame is individually compressed as
single jpeg image with full-scale contents itself and can be
retouched freely with ease. However, due to completeness of
each frame, it brings about larger file size and thus easily
tends to lose frames under limited network bandwidth.
H.264:
The latest best-renowned video compression format,
it adopts intelligent technology to record variation in each
frame rather than record each full frame. As a result, less
network bandwidth it requires and file size is prone to be
smaller compared with MJPEG.
Resolution
2048×1536 , 1920×1080 , 1280×960 ,
1280×720, 800×600, 640×480, 640x360,
320x240, 320x180
3M(2048×1536) is the highest resolution
QVGA (320x180) is the lowest resolution.
Frame Rate (fps)
NTSC: 1~30
PAL: 1~25
The utmost fps settings for 2 systems varies as the following:
NTSC:
H.264/MJPEG single stream: 2048×1536@15fps;
H.264/MJPEG single stream: 1920×1080 to 320x180@30fps
PAL:
H.264/MJPEG single stream: 2048×1536@15fps;
H.264/MJPEG single stream: 1920×1080 to 320x180@25fps
GOP (Group Of
Pictures) Length
NTSC: 1~60
PAL: 1~50
Select the GOP length number from NTSC: 1 to 60 / PAL: 1 to
50. Less number means the distance between 2 I-frames is
smaller, which needs more network bandwidth with better
image. By contrast, larger number consumes less bandwidth
but is hard to be recovered. The available length number
options of GOP will vary based on frame rate settings.
QoS (DSCP)
Codepoint
0 ~ 63
To classify and manage network traffic and provide quality of
service (QoS) on modern IP networks, Differentiated
Services Code Point (DSCP) is a computer networking
architecture that specifies a resource allocation to each
device on a priority-based pattern for ideal bandwidth
management. The bigger value, the higher priority it will be.
Profile
Main
High
There
’re 2 kinds of profiles for H.264 codec and the
compression ratio with protocol for each type are different.
Users may choose a proper one for desired applications or
contact IT personnel for more information.
Bit Rate Control
CBR: Constant Bit Rate
VBR: Variable Bit Rate
Choose the bit rate control selection based on user
requirements. Higher bit rate values will result in better
quality with bigger file size and thus consume more network
bandwidth. CBR stands for constant mode with certain fixed
rate by user definition, while VBR means variable mode in
which users can set a range of upper and lower limits
respectively for bit rate control.
