User`s manual

19
AXIS 210/211/211A - Configuration
The Low-light behavior settings determine how the camera will compensate for at low
light levels. These settings all affect video image quality and are basically a measure of
how much noise to allow in the video images.
Please see the online help for further instructions on these settings.
MPEG-4 Settings
The MPEG-4 standard provides many different coding tools for various applications in
different situations. As it is not reasonable to expect all MPEG-4 clients to support all of
these tools, it is usual to define and use certain subsets.
To view the MPEG-4 stream, the viewing client must support the subset used for the video
stream. The subset used is commonly referred to as profile@level, where the profile
defines the syntax and semantics of the tool subset and the level describes the restrictions
imposed on the profile, in terms of e.g. bandwidth.
The profiles and levels supported by the camera are as follows:
Level 5 is to prefer if there is enough bandwidth available, as the image quality of the
video stream will be better than if level 3 is used.
The GOV structure can be set to either I or IP, which describes the type of images included
in the video stream, as well as their internal order. An I-image is a complete image,
whereas a P-image is the differences in the image compared to the previous image in the
video stream. The I-structure thus consists of a sequence of complete images. The
IP-structure consists of I-images each followed by a number of P-images, using much less
bandwidth than the I-structure.
Profile@Level Properties
Advanced Simple Profile @ Level 3 Max bit rate = 768 kbit/s
ISMA compliant
Advanced Simple Profile @ Level 5 Max Bit rate = 8 Mbit/s