The three HD display modes provided by the HD video terminal are ( ). (Select 3 answers)

Answer(s): A,B,D

On an H.460 network, setting of the keep-alive duration, keep-alive port, and keep-alive field are transmitted during transmission of ( ).

Answer(s): C

During the MCU system control boards switching, the conference status on the SMC will offline for about 10s.()

Answer(s): B

Relationship between the camera and background, Why the background cannot be multifarious. (Select 2 answers)

The AF function of the camera will focus on areas where the edges have high energy. If the background is multifarious, the camera may focus on the background which makes the foreground become vague.
the multifarious background consumes large transmission bandwidth, hampering encoding and decoding effect of the foreground
The AF function of the camera will focus on areas where the edges have high energy. If the background is multifarious, the camera may focus on the foreground which makes the background become vague
the multifarious background consumes large transmission bandwidth, hampering encoding and decoding effect of the background

Answer(s): A,B

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