Extra exam question E2B03
Subelement E2, OPERATING PROCEDURES· Group E2B
How is an interlaced scanning pattern generated in a fast-scan (NTSC) television system?
- A.By scanning two fields simultaneously
- B.By scanning each field from bottom-to-top
- C.By scanning lines from left-to-right in one field and right-to-left in the next
- D.By scanning odd-numbered lines in one field and even-numbered lines in the next (correct answer)
WhyNTSC's interlaced scanning pattern is generated by scanning the odd-numbered lines of the picture in one field and the even-numbered lines in the next. Interlaced scanning in NTSC works by drawing the odd-numbered lines of the picture in one field and the even-numbered lines in the next field, with the two fields together making up a complete frame, answer D. The fields aren't scanned simultaneously, top-to-bottom versus bottom-to-top isn't the distinction being made, and alternating scan direction left-to-right versus right-to-left isn't how NTSC interlacing works either.
Published 2026-08-28 · Last updated 2026-08-28 · Question text is verbatim from the 2024-2028 NCVEC Element 4 pool (public domain); the explanation above is original writing, see our methodology.
Related questions
- E2B01In digital television, what does a coding rate of 3/4 mean?
- E2B02How many horizontal lines make up a fast-scan (NTSC) television frame?
- E2B04How is color information sent in analog SSTV?
- E2B05Which of the following describes the use of vestigial sideband in analog fast-scan TV transmissions?
- E2B06What is vestigial sideband modulation?