What properties does the color rendering index affect on the color of a video image?

Intelligent control system includes video system, audio system and others, which of the following does not belong to the video system. ( )

When the speech codec capability is negotiated in the SIP protocol, the voice codec supported by the local device is provided, including PCMU and PCMA Based on the RTP message shown in the figure, it can be seen that the ( ) voice codec is selected.

The response message "lxx" indicates . ( )

Master-slave decisions are mainly used to prevent both parties from triggering the same unsharable event or resource at the same time during communication, so a master party needs to be identified in advance. When a conflict occurs, the slave shall act at the discretion of the master.