What Is the Advantage of Interlaced Video? What Are Some $63.5 \mu$

What is the advantage of interlaced video? What are some of its problems?
(b) NTSC video has 525 lines per frame and $63.5 \mu$ sec per line, with 20 lines per field of vertical retrace and $10 \mu$ sec horizontal retrace.
1) Where does the $63.5 \mu \mathrm{sec}$ come from?
2) Which takes more time, horizontal retrace or vertical retrace? How much more time?

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(a) +: Reduce flicker. -: Introduces ser...

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