What features may be available when video signals take digital form?
A: displaying multiple channels
B: freezing frames
C: zooming in for close-up
D: All of the above
A: displaying multiple channels
B: freezing frames
C: zooming in for close-up
D: All of the above
举一反三
- What two descriptions best define DWDM？ （） A: a WDM system that is compatible with EDFA technology B: an optical technology for transmitting up to 16 channels over multiple fiber strands C: an optical technology for transmitting up to 32 channels over multiple fiber strands D: a technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDM E: a technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM
- Non-verbal signals stressed in the video include_______. A: making eye contact B: using hand gestures C: clearing the throat D: all of the above
- 4. What are the advantages of digital signals, comparedwith analog signals?
- what is a digital signal? () A: discrete signals B: continuous signals C: both of a and b D: signals exist in the world
- The function of the video distributor is one channel of video input and multiple channels of video output, with the functions of impedance matching and signal amplification. ( )