Difficulty: Easy
Correct Answer: Interlacing
Explanation:
Introduction / Context:
Video displays can update images in different patterns. Legacy television standards improved perceived flicker and bandwidth use by drawing alternate lines in successive passes, a method known as interlacing. Understanding how interlacing differs from raster-scan and vector methods clarifies terminology in graphics and display engineering.
Given Data / Assumptions:
Concept / Approach:
Interlaced scanning divides each full frame into two fields. Field 1 contains every other line, and Field 2 fills in the remainder. By refreshing fields more often than full frames, the eye perceives smoother motion at lower data rates. Raster-scan draws every line sequentially each frame. Vector (stroke) displays steer the beam along line segments rather than sweeping rows of pixels.
Step-by-Step Solution:
Match “skip lines on first pass, draw them on second” with interlacing.Eliminate vector/refresh-vector and stroke writing, which do not use alternating fields.Confirm the term: Interlacing.
Verification / Alternative check:
Standards such as 1080i exemplify interlaced video using two fields to complete a frame.
Why Other Options Are Wrong:
Refresh-vector (B) and stroke (D) are vector-based methods. Raster-scan (C) draws consecutive lines without skipping every other line.
Common Pitfalls:
Confusing interlacing with “interpolation.” Interlacing is a scan pattern, not a resampling algorithm.
Final Answer:
Interlacing.
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