RTV Part 2 Study Guide

RTV Part 2 Study Guide - 28 What are the advantages of...

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28. What are the advantages of digital compared to analog? The advantages of digital compared to analog are digital creates little or no noise ease of manipulation compression Lesson 2-slide 21 29.What is the NTSC scanning rate? a. Television’s ability to transmit images is based on the technology of scanning b. Standard U.S. television scans a television picture using two fields of information for a total of 525 lines or 480 lines (same thing) c. 525 Lines: NTSC (US, Canada, Japan, etc.) d. 625 Lines: Pal or Secam e. 1125 Lines: HDTV 30.How does interlace scanning work to produce one complete frame? What is the difference between a field and a frame? How many fields equal one frame? a. Interlace scanning, first scans all odd lines, then scan all even lines, filling in the rest of info to get complete image ( Progressive starts at top and does each line simultaneously) b. Two fields combine to make a single picture called a frame c. Two fields equal one frame-525 /2= 262.5 lines per field.
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i. Still Frames Moving 30 Frames/ sec ii. Frames Created from Tiny Dots (pixels) in each line iii. Interlace Scanning Lesson 2- slide 5-7 31. What are the colors used to capture and transmit images in a camera and TV set? Red, green, blue 32.What is CCD? a. Charged-coupled devices- Part of the first step in creating a TV Attached to the prism are light sensitive wafers (CCDs) Each of the red, green, and blue chips can sample 1 million picture elements in a manner not unlike the way a printing press uses dots to produce a color newspaper photo
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The CCDs rasterize the red, green, and blue components of the picture by turning them into rows of individual dots that we call pixels 33.Why are TV transmitters physically placed on the highest place possible? Placed high because they need a direct, clear path to reach the height of the transmitter above average terrain is an important consideration for how far the signal will travel 34.Disregard 35.What is the difference between interlaced and progressive scanning? Interlaced scanning uses two fields to complete a frame. One field scans 262.5 of odd lines first, and the other has 262.5 even lines. (A PAL based television display, for example, scans 50 fields every second (25 odd and 25 even). The two sets of 25 fields work together to create a full frame every 1 /25th of a second, resulting in a display of 25 frames per second)
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This note was uploaded on 02/15/2011 for the course RTV 3007 taught by Professor Staff during the Fall '08 term at University of Florida.

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RTV Part 2 Study Guide - 28 What are the advantages of...

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