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Communication Systems

Q1:

In PAL system weighting of R - Y and B - Y signals is done to

A prevent over modulation on saturated colours

B prevent under modulation of saturated colours

C allow over modulation of saturated colours

D allow under modulation on saturated colours

ANS:A - prevent over modulation on saturated colours

Weighting reduces the chances of over-modulation of the transmitter carrier in the presence of highly saturated colours when picture has very light or very dark parts.



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