Configuration and Operation
95
9.4.1.5
GOV Settings
Users can set the GOV length to determine the frame structure (I-frames and P-frames) in a video
stream for saving bandwidth. The setting range is from 2 to 64. A longer GOV means decreasing the
frequency of I-frames. The default GOV setting for H.264-1 and H.264-2 is 60. The default GOV
setting for H.264-3 and H.264-4 (CB-6208) is 30. Click
SAVE
to confirm the GOV setting.
9.4.1.6
H.264 Profile
The H.264 standard defines 21 sets of capabilities. These are referred to as profiles and they target
specific classes of applications. In the security industry, the most common are as follows:
Baseline Profile (BP)
Primarily for low-cost applications that require additional data loss robustness,
Baseline
Profile
is used in some videoconferencing and mobile applications. This is the most common
profile used in IP security cameras due to the low computational cost of processing the video
using this profile.
Main Profile (MP)
This profile provides improved picture quality at reduced bandwidths and storage costs and
is becoming more common as the camera processors (DSPs) become more able to handle
the processing load.
Main Profile
can save 10-12% over
Baseline
. This is the default profile.
High Profile (HP)
High Profile
is the primary profile for HD broadcast applications. It can save 10-12% of the
storage cost over
Main Profile
. However, it may also increase video latency, depending on
the stream structure. Quasar Gen II models default to the
Main Profile
to provide the best
trade-off between storage size and video latency.
Click
SAVE
to confirm the settings.
