NO.149 T.140 Subtitles support sending and receiving subtitles from SIP, H.323 type terminals.

NO.150 Which of the following video resolutions meet the 16:9 aspect ratio requirement?

NO.151 Enabling SEC, the system can automatically adjust the network transmission and different error corrections of AV processing for the rich QOS mode of the IP network After enabling SEC, the anti-packet loss ability has been greatly improved ()

NO.152 Due to the size of the display and the limitation of MCU resources, the number of multi-screen sprites generally does not exceed 16 sprites, otherwise the image is too small and the picture will not be clear.

NO.153 At what level is the SIP protocol located?

NO.154 Due to the size of the display and the resource limitations of the MCU , the number of multi-screen sprites generally does not exceed 24 , otherwise the image is too small and the picture will not be clear.

NO.155 The role of MP is to complete the interaction of control information with the conference TV terminal.

NO.156 The video signal starts from the input terminal device, is encoded and compressed and sent to the network, and finally displays, and has undergone many image processing links in the middle, mainly including: IP Camera, pre-processing, compression encoding, data encapsulation and transmission, decoding, image format variation , broadcast. ( )

NO.157 The RTP protocol provides both real-time transmission capabilities and service quality assurance mechanisms.

NO.158 Protocol is a firewall/NAT traversal standard approved by the ITU of the International Telecommunication Union, which two protocols are mainly composed?

NO.159 Session Management (SIP) and Session Description (SDP) are not independent, they complement each other so that new applications or media can be easily added.

NO.160 H. 323 ALG can only be used with certain firewalls. ( )

NO.161 Under static NAT networking, the SRC address of the terminal under the private network changes to ( ).

NO.162 What is the software format of the HD Video Terminal Upgrade Pack?

NO.163 The H.460 protocol specifies that H.323 signaling parts of the public-private network traversal are handled. ()

NO.164 Dynamic mapping can be from multiple private addresses to a single public address, or from multiple private addresses to multiple public addresses. ()

NO.165 Any color at the opposite end of the diameter of the color ring is called a complementary color. ( )

NO.166 Which of the following measures can users use to expand the video port of the VP9650 ?

NO.167 In MCU odd wall mode, you can configure IP routing to specify that IP routes send and receive data through GE1.

NO.168 The H460 protocol specifies that the H.323 media streaming portion of the public-private network traversal processing process is