Operation Manual

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BIT RATE
The bit rate is the quality of the video stream (rendered in kilobits per second). The higher the value, the higher the video quality and bandwidth
required.
NOTE: When you change any of the video stream configuration settings, the camera automatically adjusts the bit rate. If you manually reduce
the bit rate lower than the camera's automatic setting, the image quality might be reduced and the stream selection options might be limited.
I-FRAME INTERVAL
The I-frame interval configures the number of partial frames that occur between full frames in the video stream. For example, in a scene where a
door opens and a person walks through, only the movements of the door and the person are stored by the video encoder. The stationary
background that occurs in the previous partial frames is not encoded, because no changes occurred in that part of the scene. The stationary
background is only encoded in the full frames. Partial frames improve video compression rates by reducing the size of the video. As the I-frame
interval increases, the number of partial frames increases between full frames. Higher values are recommended only on networks with high
reliability. This setting is available only with H.264.
QUALITY OF SERVICE FOR DIFFERENTIATED SERVICES CODE POINT
Quality of Service (QoS) for Differentiated Services Code Point (DSCP) is a code that allows the network to prioritize the transmission of different
types of data. This setting is available only with H.264.
NOTES:
• If you are not familiar with DSCP, contact your network administrator before changing this setting.
• Your network must be configured to use QoS. If you are unsure if your network is QoS-aware, contact your network administrator.
ENDURA SIGNING
Enabling the Endura Signing feature allows an Endura
®
system to authenticate video from an Endura recorded stream. This setting is available
only with H.264.
PROFILE
The profile defines the subset of bit stream features in an H.264 stream, which includes color reproduction and additional video compression. It
is important to select the highest profile that is compatible with the recording device so that you receive the best compression that your decoder
can process.
Baseline: A simple profile with a low compression ratio. A baseline profile is compatible with more recorders but uses more bits to compress
quality video than the other profiles. This profile supports I-frames and P-frames. Use the baseline profile in applications with limited scene
changes; for example, an indoor scene with a single, unchanging primary light source and minimal motion.
Main: An intermediate profile with a medium compression ratio. The default setting is main. This profile is compatible with most recorders and
uses fewer bits to compress video than the baseline profile; however, it uses more bits than the high profile. The main profile supports I-frames
and P-frames.
High: A complex profile with a high compression ratio. This is the primary profile for high-definition television applications; for example this is
the profile adopted for Blu-ray and HD-DVD. The high profile supports I-frames and P-frames.
RATE CONTROL
The rate control setting determines the bit rate and quality of each frame in the H.264 video stream. Each rate control setting is a compromise
between image quality and the resources required for video storage.
CBR: The constant bit rate (CBR) streams video at a fixed number of bits per second. CBR uses the full capacity of the bit rate setting for scenes
with or without motion. Video is always streamed at the user bit rate setting.
VBR: The variable bit rate (VBR) reduces or increases bit rates in response to motion while maintaining high-quality video. VBR uses variable
capacity of the bit rate setting for scenes according to a user-defined target bit rate.
CVBR: The constrained variable bit rate (CVBR) provides high-quality video and long recording time of variable bit rate while limiting variations
in recording capacity consumption.