Huawei IPC6125-WDL-FA Configuration Manual page 54

IPC6125-WDL-FA
Configuration Guide
Parameter
Encoding
complexity
Resolution
Bit rate type
Bit rate value
Bit rate control
mode
Bit rate upper limit
Issue 01 (2016-08-20)
Description
The parameter is available only when you set Coding protocol to
H.264.
H.264 includes H.264 Base Profile, H.264 Main Profile, and H.264
High Profile. Of them, H.264 Base Profile has the lowest encoding
compression performance and lowest requirements on hardware
decoding performance, while H.264 High Profile has the highest.
The coding complexity of H.265 is H.265 Main. When the coding
protocol is changed from MJPEG and H.265 back to H.264, H.264
High Profile is used by default.
Increasing the resolution improves the video quality but consumes
more bandwidth.
NOTE
l The PAL standard primarily applies to China and Europe.
l The NTSC standard primarily applies to America and Japan.
The Bit rate type parameter is available only when you set Coding
protocol to H.264 and H.265.
The bit rate is the number of data bits transmitted in a unit of time.
The Bit rate value 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.
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.
l When the total bit rate of enabled live video streams exceeds 40
Mbit/s, you are advised to reduce the bit rate or the number of
enabled video streams to prevent image freeze or artifacts caused
by large bit streams.
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 Bit rate upper limit parameter is available only when you set
Bit rate type to Variable bit rate.
The bit rate range is associated with the resolution.
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6 Setting Video Parameters
48