1. "Digital Media Primer" Yue-Ling Wong, Copyright (c)2013 by Pearson Education, Inc. All rights reserved.

2. Chapter 6 Fundamentals of Digital Video
Part 1
The Properties of Broadcast Video

3. In this lecture, you will learn:
the basic terminology of broadcast standards that will prepare you to learn digital video terminology and standards

4. Video
motion
a sequence of pictures

5. Video
motion
a sequence of pictures
frames

6. Frame Rate How fast the pictures are captured
How fast the frames are played back is determined by
Frames per second (fps)

7. Broadcast Standards Digital video resolution Color spaces Frame rate
Influenced by analog TV broadcast standards

8. Frame Rates of Different Broadcast Standards
Video Type
Frame Rate (frames per second)
NTSC (black-and-white) 30
NTSC (color)
29.97
PAL 25
SECAM
Motion-picture film 24

9. How CRT Monitors and TVs Display Pictures
Picture displayed on CRT is made up of horizontal lines
NTSC: 525 lines (about 480 lines are picture)
PAL and SECAM: 625 lines (about 576 lines are picture)
Lines are traced across the screen
one line at a time
from top to bottom

10. Ways of Tracing Lines From Top to Bottom
Progressive scan:
from top to bottom in one pass
Interlaced scan:
in two passes:
even-numbered lines
odd-numbered lines

11. Review Questions Note to instructor:
Depending on your preference, you may want to go over the review questions at the end of this lecture as an instant review or at the beginning of next lecture to refresh students' memory of this lecture.

12. Review Question The scan mode of a CRT computer monitor is ___.
interlaced
progressive A

13. Review Question The scan mode of a CRT television set is ___.
interlaced
progressive A

14. Review Question
Interlaced scan displays the frame by scanning the lines of a frame ___.
in one pass from top to bottom
in two passes: even-numbered lines in one pass and odd-numbered lines in the second B

15. Review Question
Progressive scan displays the frame by scanning the lines of a frame ___.
in one pass from top to bottom
in two passes: even-numbered lines in one pass and odd-numbered lines in the second A