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Q: 11

Several video compression standards that are currently widely used include: H.261H.263 and H.264 and MPEG-1. MPEG-2 and MPEG-4. Its H.26X series of standards is primarily used for real-time video communications, and the MPEG series of standards is primarily used for video storage (DVD), video broadcasting, and video streaming.

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Q: 12
Illuminance, expressed in terms of the luminous flux accepted per unit area, is expressed in lux (Lux , lx ). ( )
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Q: 13
The gatekeeper rejects the access authentication, address resolution request, and gives the resolution result, which of the following signaling can achieve this function
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Q: 14
In the Early state, dialog can be terminated by ( ).
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Q: 15
A short message is when a message ( ) can be sent to a designated venue or to all venues for inter- venue communication and information prompting.
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Q: 16
In the hierarchical relationship of SIP structure, what are the following main items of the request message?
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Q: 17
During the terminal registration GK phase, the UDP header in the RRQ registration request message contains the following information ( ).
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Q: 18
The compression encoding of audio signals can be divided into ( ).
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Q: 19
The MCU node number after the meeting, consisting of ( ).
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Q: 20
The main role of the 317.H.245 protocol is ( ).
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Question 11 of 20 · Page 2 / 2

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