What is the phase relationship between the delayed and non-delayed video?

What is the phase relationship between the delayed and non-delayed video?

• A. Opposite polarity
• B. Same polarity
• C. Quadrature phase
• D. No fixed phase

Answer: (A)

Delaying a video signal creates a phase shift between the delayed copy and the original. If the delay corresponds to half of the period of the dominant video frequency, that phase shift is 180 degrees, which is equivalent to the signal flipping its polarity. So the delayed video appears inverted relative to the non-delayed video, making opposite polarity the correct description. The other options describe zero shift (same polarity), a 90-degree shift (quadrature), or an unpredictable relationship (no fixed phase), none of which fit the scenario where a time delay that aligns with half a cycle causes a sign inversion.

Delaying a video signal creates a phase shift between the delayed copy and the original. If the delay corresponds to half of the period of the dominant video frequency, that phase shift is 180 degrees, which is equivalent to the signal flipping its polarity. So the delayed video appears inverted relative to the non-delayed video, making opposite polarity the correct description. The other options describe zero shift (same polarity), a 90-degree shift (quadrature), or an unpredictable relationship (no fixed phase), none of which fit the scenario where a time delay that aligns with half a cycle causes a sign inversion.