What is the purpose of FTC?

• A. Emphasizes the trailing edge and de-emphasizes the rest of the video
• B. Increases the overall video gain
• C. Filters out noise completely
• D. Emphasizes the leading edge and deemphasizes the remaining video

Answer: (D)

The idea being tested is how a technique shapes a video signal to make important features stand out. Emphasizing the leading edge means giving extra weight to the initial, rapid change in the video signal and then reducing emphasis on what comes after. This creates a high-pass effect: sharp onsets become more salient while the slower, lingering parts are toned down. In radar video, the leading edge often carries the most immediate cue that something new has appeared, so boosting that edge helps you detect and identify targets more quickly and clearly, while deemphasizing the rest helps suppress later clutter and noise that would otherwise blur the signal.

Choosing the leading-edge emphasis over the trailing edge makes sense because you want the first indication of a target to pop out, not the tail of the signal. Increasing the overall gain would just amplify noise and clutter alongside the signal, and trying to filter noise out completely isn’t feasible without losing legitimate signal content.