Huawei IPC6122-P Configuration Manual page 39

IPC6122-P
Configuration Guide
Parameter
Bit rate type
Bit rate value
Bit rate control mode
Bit rate upper limit
Frame rate
Image quality
I-frame interval
Issue 02 (2016-04-06)
Description
The parameter is available only when you set Coding protocol
to H.264.
The bit rate is the number of data bits transmitted in a unit of
time.
The parameter is available only when you set Bit rate type to
Constant bit rate.
Increasing the bit rate value improves the video quality but
consumes more bandwidth.
NOTE
l To ensure the video quality, you must set a proper bit rate value based
on the site requirements.
l To ensure video smoothness, the actual bandwidth is greater than the
bit rate value. When the bit rate is low, the required bandwidth is
generally 1.2 times of the bit rate.
The parameter is available only when you set Bit rate type to
Constant bit rate. The options are as follows:
l Frame rate priority: The frame rate stability is preferentially
ensured. However, if the scenario is complex or if the object
moves quickly in an image, the actual bit rate can be greater
than the preset value.
l Image quality priority: The image quality is preferentially
ensured. However, if the scenario is complex or if the object
moves quickly in an image, frame loss may occur or live
video may not be played smoothly.
The parameter is available only when you set Bit rate type to
Variable bit rate.
The bit rate range is associated with the resolution.
The frame rate is the number of frames displayed in a second.
Increasing the frame rate improves the video quality but
consumes more bandwidth.
The parameter is available only when you set Coding protocol
to H.264 and Bit rate type to Variable bit rate.
NOTICE
Better image quality indicates that more network bandwidth is consumed.
Configure a proper image quality value based on the site requirements.
The parameter is available only when you set Coding protocol
to H.264.
I-frame is an intra-coded frame that represents a fixed image
independent of other picture types. Each group of pictures (GOP)
begins with this type of frame.Decreasing the I-frame interval
improves the video quality but consumes more bandwidth.
NOTE
It is recommended that the I-frame interval be set to two times of the
frame rate.
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6 Setting Video Parameters
34